{"title":"PIR \u0026 Motion Sensors","description":"\u003cp\u003eMotion sensors switch on lights, sound alarms and count people. They all give a simple digital output that goes HIGH when something moves.\u003c\/p\u003e\n\u003cp\u003ePIR (passive infrared) sensors watch for changes in body heat crossing their field of view, so a person sitting perfectly still can eventually stop triggering them.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eHC-SR501\u003c\/strong\u003e is the classic module: longer range (up to about 7 m), a 4.5-20V supply, and two potentiometers for sensitivity and hold time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMini PIRs\u003c\/strong\u003e such as the HC-SR505 are tiny, fixed and very low power, which suits battery builds.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eRCWL-0516\u003c\/strong\u003e is different: a microwave radar that senses movement through plastic, glass and thin wood, so it still works sealed inside a box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePick the HC-SR501 when you want to tune it.\u003c\/li\u003e\n\u003cli\u003ePick a mini PIR for battery or compact builds.\u003c\/li\u003e\n\u003cli\u003ePick radar when the sensor must be hidden.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery PIR needs a 30-60 second warm-up after power-on, and false triggers during that window are normal. Keep PIRs away from curtains, direct sun and air vents. All of these work with Arduino and ESP32 using a single digitalRead().\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhy does my PIR trigger right after power-on?\u003c\/h3\u003e\n\u003cp\u003eIt needs 30-60 seconds to settle to the room's infrared level.\u003c\/p\u003e\n\u003ch3\u003eWhy does a still person stop triggering it?\u003c\/h3\u003e\n\u003cp\u003eA PIR detects changes in infrared, not heat itself. A motionless body gives a flat signal.\u003c\/p\u003e\n\u003ch3\u003eHC-SR501 or a mini PIR?\u003c\/h3\u003e\n\u003cp\u003eThe HC-SR501 if you need adjustable range and delay. A mini PIR for small, low-power builds.\u003c\/p\u003e\n\u003ch3\u003eCan a motion sensor work inside a box?\u003c\/h3\u003e\n\u003cp\u003eA PIR cannot see through plastic. The RCWL-0516 radar can.\u003c\/p\u003e\n\u003ch2\u003eGuides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/hc-sr501-pir-motion-sensor-explained-how-it-works-and-how-to-wire-it-to-an-arduino-uno\"\u003eHC-SR501 PIR Motion Sensor Explained: How It Works and How to Wire It to an Arduino Uno\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/how-does-a-pir-motion-sensor-work\"\u003eHow Does a PIR Motion Sensor Work?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/rcwl-0516-radar-esp32-room-occupancy-sensor\"\u003eRCWL-0516 Radar + ESP32: Build a Room Occupancy Sensor That Works Through Its Own Box\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Why does my PIR trigger right after power-on?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It needs 30-60 seconds to settle to the room's infrared level.\"}}, {\"@type\": \"Question\", \"name\": \"Why does a still person stop triggering it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A PIR detects changes in infrared, not heat itself. A motionless body gives a flat signal.\"}}, {\"@type\": \"Question\", \"name\": \"HC-SR501 or a mini PIR?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HC-SR501 if you need adjustable range and delay. A mini PIR for small, low-power builds.\"}}, {\"@type\": \"Question\", \"name\": \"Can a motion sensor work inside a box?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A PIR cannot see through plastic. The RCWL-0516 radar can.\"}}]}\u003c\/script\u003e","products":[{"product_id":"hfs-dc06-58ghz-radar-motion-sensor-module-doppler-detection","title":"HFS-DC06 5.8GHz Radar Motion Sensor Module | Doppler Detection","description":"\u003ch1\u003eHFS-DC06 5.8GHz Microwave Motion Doppler Radar Sensor Module\u003c\/h1\u003e\u003cp\u003eThe HFS-DC06 is a compact 5.8GHz microwave radar sensor that uses the Doppler effect to detect moving objects. It can penetrate non-metallic materials like drywall and plastic, making it suitable for hidden motion detection in automation, security, and lighting projects. With a straightforward digital output and adjustable detection range, it integrates easily with microcontrollers for a wide variety of DIY and professional applications.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Current\u003c\/td\u003e\n\u003ctd\u003e30mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e5.8GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e0 to 10 meters (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eDigital (high on motion detected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e4-pin header (VCC, GND, OUT, EN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAutomatic door opener that triggers when someone approaches\u003c\/li\u003e\n\u003cli\u003eMotion-activated lighting system for rooms or corridors\u003c\/li\u003e\n\u003cli\u003eIntruder alarm that senses movement through walls\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-garage-vehicle-presence-detector-v19\"\u003eGarage parking sensor to detect vehicle presence\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with any 3.3V or 5V microcontroller like Arduino UNO, ESP8266, ESP32, and Raspberry Pi (using level shifting if needed). Its digital output can be read directly on a GPIO pin. Pair with a relay module to control high-voltage devices.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to ground, and OUT to any digital input pin. Use the EN pin to enable or disable the sensor (pulled high by default). Mount the sensor away from large metal objects for optimal detection.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and OUT to a digital pin. When motion is detected, the OUT pin goes high (3.3V logic, readable by 5V Arduino).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect through walls?\u003c\/summary\u003e\u003cp\u003eYes, 5.8GHz microwaves pass through non-metallic materials like drywall, wood, and plastic. It can detect motion behind a thin wall or enclosure.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the detection angle?\u003c\/summary\u003e\u003cp\u003eThe module has a hemispherical detection pattern covering a wide area, but for best results, position it facing the area you want to monitor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444953407853,"sku":"CDN-0212","price":510.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/hfs-dc06-58ghz-radar-motion-sensor-module-doppler-detection-8016766.jpg?v=1790780227"},{"product_id":"58ghz-microwave-motion-sensor-human-presence-detection","title":"5.8GHz Microwave Motion Sensor - Human Presence Detection","description":"\u003ch1\u003eHuman Presence Microwave Motion Sensor 5.8 GHz\u003c\/h1\u003e\n\u003cp\u003eThis sensor uses 5.8 GHz millimeter-wave radar to detect stationary and moving human presence, unlike basic PIR sensors that only detect motion. It reports distance, motion, and static presence data via UART, making it perfect for intelligent automation in homes, offices, and industrial settings.\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e5.8 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e0.75 m to 5 m (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eUART (TX\/RX), digital presence pin\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Angle\u003c\/td\u003e\n\u003ctd\u003eApproximately 100° conical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e24 x 24 mm PCB module\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-occupancy-based-lighting\"\u003eOccupancy-based smart lighting that stays on as long as a person is in the room, even if motionless.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eEnergy-saving automation to turn off fans, ACs, or monitors when a desk is vacated.\u003c\/li\u003e\n  \u003cli\u003eA security system that triggers an alert or camera when an intruder is present.\u003c\/li\u003e\n  \u003cli\u003ePeople counting and room occupancy dashboard for offices or shops using serial data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller that supports 5V logic level UART, such as Arduino Uno, ESP32, or Raspberry Pi Pico. For 3.3V boards like Raspberry Pi GPIO UART, use a level shifter or voltage divider on the sensor’s TX line. Common pairings include ESP32 for Wi-Fi integration and Arduino for rapid prototyping.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V and GND to ground. Connect the sensor’s TX pin to the microcontroller’s RX pin and RX to TX. The digital presence output goes high when human presence is detected; use a 10kΩ pull-up if needed. Ensure the sensor is mounted with its antenna side unobstructed and away from metal.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi 4?\u003c\/summary\u003e\u003cp\u003eYes, but the Raspberry Pi’s GPIO UART operates at 3.3V while the sensor outputs 5V. Use a logic-level converter or a simple resistor divider on the sensor’s TX line to avoid damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect a person sitting completely still?\u003c\/summary\u003e\u003cp\u003eYes, this sensor emits and analyses reflected microwave signals, so it can detect stationary human presence by sensing micro-movements like breathing. It provides separate ‘moving’ and ‘static’ status outputs.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum detection distance?\u003c\/summary\u003e\u003cp\u003eThe sensor can detect presence up to 5 meters, but the firmware allows restricting zones via serial commands. The effective range depends on mounting height and environment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444953506157,"sku":"CDN-0216","price":730.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/58ghz-microwave-motion-sensor-human-presence-detection-1828903.jpg?v=1790780227"},{"product_id":"mr-hw08kt-motion-detection-sensor-module-for-home-automation-switching","title":"MR-HW08KT Motion Detection Sensor Module for Home Automation Switching","description":"\u003ch1\u003eMR-HW08KT Motion Detection \u0026amp; Switching Sensor Module for Home Automation\u003c\/h1\u003e\u003cp\u003eThe MR-HW08KT is a passive infrared (PIR) motion sensor module designed for automatic switching in home automation and security systems. It detects human movement within a 7-meter range and outputs a TTL-level signal to trigger relays, microcontrollers, or other loads. With adjustable sensitivity and delay time, it adapts to various indoor detection scenarios.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V–12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003eUp to 7 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Angle\u003c\/td\u003e\n\u003ctd\u003e120° conical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eHigh (3.3V) when motion detected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Delay\u003c\/td\u003e\n\u003ctd\u003e~5 seconds to 5 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Sensitivity\u003c\/td\u003e\n\u003ctd\u003eVia on-board potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAutomatic room light controller that turns lights on when someone enters\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-esp32-gsm-sms-alert-system\"\u003eSecurity alarm system with buzzer and SMS alert via GSM module\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eSmart corridor or staircase lighting for energy saving\u003c\/li\u003e\n\u003cli\u003eMotion-activated camera or recording trigger\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe module works with any 5V or 3.3V microcontroller that has a digital input, including Arduino Uno, Nano, ESP8266, ESP32, and Raspberry Pi (with level shifting for 5V logic). The output is active high and can directly drive an LED or interface with a relay module (use a transistor driver if the relay coil current exceeds 20mA). Common pairings include 5V single-channel relay modules for appliance control.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to a 5V–12V DC supply, GND to common ground, and OUT to a digital GPIO pin. No external pull-up is needed; the output is push-pull. The on-board regulator provides a stable 3.3V logic output—compatible with both 3.3V and 5V inputs. Avoid running signal wires parallel to high-current cables to minimise false triggers.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and OUT to any digital pin. The output is 3.3V but Arduino 5V inputs recognise it as HIGH.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I adjust the detection delay and sensitivity?\u003c\/summary\u003e\u003cp\u003eUse the potentiometers on the module. One adjusts the time the output stays high after motion (clockwise increases delay), the other adjusts the PIR sensitivity to movement.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan this module directly switch a 230V light?\u003c\/summary\u003e\u003cp\u003eNo, it outputs a low-current signal. You'll need a relay module or SSR rated for mains voltage to switch appliances safely.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444958454125,"sku":"CDN-0326","price":270.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/mr-hw08kt-motion-detection-sensor-module-for-home-automation-switching-6359806.jpg?v=1790780107"},{"product_id":"rcwl-0516-microwave-radar-sensor-motion-detection-module","title":"RCWL-0516 Microwave Radar Sensor – Motion Detection Module","description":"\u003ch1\u003eRCWL-0516 Microwave Radar Sensor – 5V Motion Detection Through Walls\u003c\/h1\u003e\n\n\u003cp\u003eThe RCWL-0516 is a Doppler radar motion sensor module that uses microwave signals to detect movement through non-metallic barriers like drywall, wood, and glass. Unlike passive infrared (PIR) sensors, it does not require line-of-sight and can sense motion even behind walls or doors. Ideal for hidden sensor installations, automatic lighting, and security systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3–5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003eUp to 7 meters (adjustable via potentiometer)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e3.3 V TTL – HIGH on motion (jumper configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrowave Frequency\u003c\/td\u003e\n\u003ctd\u003e3.18 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e~20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e36 × 17 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMotion-activated room lighting that works even with hidden sensor placement\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-gsm-sms-kit-build-an-iot-button-that-sends-messages\"\u003eDIY security alarm with SMS alerts using GSM module and Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAutomatic door or gate opener triggered by approaching people or vehicles\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp8266-nodemcu-home-automation-project-kit\"\u003eSmart home occupancy sensor for presence-based automation with NodeMCU\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any 3.3 V or 5 V microcontroller including Arduino Uno\/Nano, ESP8266, ESP32, and Raspberry Pi. The 3.3 V logic output is safe for Raspberry Pi GPIO directly, and is reliably read as HIGH by 5 V Arduino inputs. No external level shifting required for most setups.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3–5 V (use 5 V for best detection range), GND to common ground, and OUT to a digital input pin. Keep the antenna area away from large metal objects and WiFi routers to avoid interference. For noisy power supplies, add a 100 μF electrolytic capacitor across VCC and GND.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the RCWL-0516's 3.3 V output is correctly interpreted as a logic HIGH by Arduino Uno's 5 V inputs. Simply wire VCC to 5 V, GND to GND, and OUT to any digital pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect motion through walls?\u003c\/summary\u003e\u003cp\u003eMicrowave radar penetrates typical interior walls, wood, and glass, but not solid metal or thick concrete. The effective range reduces when objects are behind barriers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum detection range?\u003c\/summary\u003e\u003cp\u003eThe onboard potentiometer adjusts sensitivity for up to approximately 7 meters. Larger targets (e.g., people vs. small animals) are detected farther, and obstacles can shorten the range.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444959240557,"sku":"CDN-0338","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/rcwl-0516-microwave-radar-sensor-motion-detection-module-7002897.jpg?v=1790780107"},{"product_id":"human-presence-microwave-motion-sensor-58-ghz-radar-module","title":"Human Presence Microwave Motion Sensor 5.8 GHz Radar Module","description":"\u003ch1\u003eHuman Presence Microwave Motion Sensor 5.8 GHz Radar Module\u003c\/h1\u003e\n\n\u003cp\u003eThis 5.8 GHz microwave motion sensor uses Doppler radar to detect movement and even stationary human presence through non-metallic obstacles like walls or furniture. It's more sensitive than PIR sensors and works well for occupancy detection, automated lighting, and security systems. The module outputs a voltage signal upon detecting motion, making it easy to interface with microcontrollers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating frequency\u003c\/td\u003e\n\u003ctd\u003e5.8 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection range\u003c\/td\u003e\n\u003ctd\u003eUp to 7 meters (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput voltage\u003c\/td\u003e\n\u003ctd\u003e4–28 VDC (typically 5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput signal\u003c\/td\u003e\n\u003ctd\u003e3.3V TTL logic level (high on motion)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePenetration\u003c\/td\u003e\n\u003ctd\u003eNon-metallic materials (wood, plastic, glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e28.5mm × 17.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eTouchless light switch that activates when you enter a room\u003c\/li\u003e\n  \u003cli\u003eOccupancy-based energy‑saving systems for home or office\u003c\/li\u003e\n  \u003cli\u003eHidden security sensor to detect intruders through walls\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-garage-door-opener-kit-auto-open-and-close-via-phone-ble\"\u003eAutomatic door opener or garage presence detector\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller that can read a digital input, including Arduino, ESP8266, ESP32, Raspberry Pi (with level shifting for 5V logic). The module has a 3.3V regulator, so it can be powered directly from 5V or a battery within the wide input range. Pair it with a relay module for controlling mains appliances.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VIN to 5V (or up to 28V), GND to ground, and OUT to a digital input pin. The output goes HIGH for a few seconds when motion is detected; keep the antenna area clear of metal for best range. Add a 10kΩ pull‑down resistor if using with a sensitive MCU input.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the sensor outputs a 3.3V signal which is safely read by Arduino's 5V logic pins. Connect VIN to 5V, GND to GND, and OUT to a digital pin (e.g., pin 2).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect motion through walls?\u003c\/summary\u003e\u003cp\u003eYes, it can detect human movement through non‑metallic barriers like drywall, wood, or glass, though the range may reduce slightly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this sensor detect stationary people?\u003c\/summary\u003e\u003cp\u003eUnlike basic PIR sensors, this module can detect stationary human presence due to the Doppler effect from minute movements like breathing, making it suitable for occupancy sensing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444994761069,"sku":"CDN-0592","price":730.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/human-presence-microwave-motion-sensor-58-ghz-radar-module-7494155.jpg?v=1790779985"},{"product_id":"bm612-digital-pir-sensor-adjustable-motion-detection-module","title":"BM612 Digital PIR Sensor – Adjustable Motion Detection Module","description":"\u003ch1\u003eBM612 Digital PIR Motion Sensor – 5V, Adjustable Delay \u0026amp; Sensitivity\u003c\/h1\u003e\n\n\u003cp\u003eThe BM612 is a digital passive infrared (PIR) sensor module that detects motion by sensing changes in infrared radiation from moving objects. It outputs a clean digital high signal when motion is detected, making it ideal for microcontroller-based security systems, automatic lighting, and IoT projects. With onboard potentiometers for delay and sensitivity adjustment, you can fine-tune its behaviour to avoid false triggers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC (3.3V logic compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003eUp to 7 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Angle\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 120° cone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eDigital high (3.3V) when motion detected\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDelay Adjustment\u003c\/td\u003e\n\u003ctd\u003e5s to 300s (rotary pot)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity Adjustment\u003c\/td\u003e\n\u003ctd\u003eRotary potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32mm x 24mm x 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic room light controller that switches on when you enter\u003c\/li\u003e\n  \u003cli\u003eLow-cost burglar alarm with Arduino and a buzzer\u003c\/li\u003e\n  \u003cli\u003eMotion-activated wildlife camera using an ESP32-CAM\u003c\/li\u003e\n  \u003cli\u003eContactless doorbell or entrance alert system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe BM612 works with any microcontroller that can read a digital input, including Arduino Uno, Nano, ESP8266, ESP32, and Raspberry Pi Pico. Its output is 3.3V logic, so it connects safely to 3.3V boards without level shifting. For 5V Arduino boards, the 3.3V output still reads as a valid high. It pairs well with relay modules for switching mains-powered devices.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to GND, and OUT to any digital pin on your microcontroller. No external pull-up resistor is needed. If driving a relay directly, place a 10KΩ resistor between OUT and the relay base to limit current. Avoid placing the sensor near heat sources or windows to minimize false triggers.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, the BM612 output is 3.3V logic and can connect directly to a Raspberry Pi GPIO pin. Use a simple Python script to monitor the pin state and trigger actions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust sensitivity and delay?\u003c\/summary\u003e\u003cp\u003eTurn the two orange potentiometers on the board using a small screwdriver. One adjusts sensitivity (clockwise for more sensitive), the other sets the time the output stays high after motion stops (5 to 300 seconds).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect motion through glass?\u003c\/summary\u003e\u003cp\u003eNo, PIR sensors cannot detect infrared changes through glass because glass blocks most infrared wavelengths. Place it in an open area for reliable detection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445008032109,"sku":"CDN-0663","price":130.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/bm612-digital-pir-sensor-adjustable-motion-detection-module-9728086.jpg?v=1790779928"},{"product_id":"hc-sr505-mini-pir-motion-sensor-module-3-15v-3m-range","title":"HC-SR505 Mini PIR Motion Sensor Module | 3-15V, 3m Range","description":"\u003ch1\u003eHC-SR505 Mini Infrared PIR Motion Sensor Module – 3-15V, 3m Detection\u003c\/h1\u003e\u003cp\u003eThe HC-SR505 is a compact pyroelectric infrared (PIR) motion sensor module designed for human detection. It outputs a TTL high signal when movement is detected within its 3-meter, 100-degree conical field of view. With a wide operating voltage range and ultra-low standby current, it's ideal for battery-powered security, automation, and IoT projects.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3–15V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatic Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;50µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003eUp to 3 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Angle\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;100° cone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eTTL high (3.3V) when motion detected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelay Time\u003c\/td\u003e\n\u003ctd\u003eFixed 8 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-pir-motion-night-light\"\u003eMotion-activated night light\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eIntruder alarm system\u003c\/li\u003e\n\u003cli\u003eAutomatic door or gate opener\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-room-occupancy-counter\"\u003eRoom occupancy counter for energy saving\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe HC-SR505 works with any microcontroller or single-board computer that accepts 3.3V logic, including Arduino Uno, ESP32, ESP8266, and Raspberry Pi. Even when powered by 5V, its output remains a safe 3.3V level, so no level shifting is required for 3.3V devices. It can drive a digital input pin directly.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to a 3–15V supply, GND to common ground, and OUT to any digital I\/O pin. For stable operation, add a 10µF electrolytic capacitor across VCC and GND near the sensor. The output goes high for about 8 seconds upon detecting motion; no external pull-up is needed.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V (or 3.3V), GND to GND, and OUT to any digital pin. The output is 3.3V logic and safe for Arduino inputs.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect motion through walls or glass?\u003c\/summary\u003e\u003cp\u003eNo, PIR sensors require direct line-of-sight infrared radiation; they cannot detect through solid barriers. For hidden installations, use a sensor with an external lens or mount it behind an IR-transparent window.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat's the difference between HC-SR505 and HC-SR501?\u003c\/summary\u003e\u003cp\u003eThe HC-SR505 is smaller, has a fixed delay of about 8 seconds, and no sensitivity trimmer. The HC-SR501 is larger, adjustable via two potentiometers, and often used for more flexible applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445015142765,"sku":"CDN-0685","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/hc-sr505-mini-pir-motion-sensor-module-3-15v-3m-range-1141715.jpg?v=1790779927"},{"product_id":"hc-sr501-pir-motion-sensor-module-for-arduino-raspberry-pi","title":"HC-SR501 PIR Motion Sensor Module for Arduino \u0026 Raspberry Pi","description":"\u003ch1\u003ePIR Motion Detection Sensor – HC-SR501\u003c\/h1\u003e\n\u003cp\u003eThe HC-SR501 is a passive infrared (PIR) motion sensor module that detects changes in infrared radiation from warm bodies. Widely used in security alarms, automatic lights, and presence-triggered devices, it outputs a digital HIGH signal for a configurable time when motion is sensed.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5V to 20V DC (nominal 5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e3–7 metres (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Angle\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 140° cone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e3.3V HIGH when triggered (TTL)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDelay Time\u003c\/td\u003e\n\u003ctd\u003e5–200 seconds (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eQuiescent Current\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 50 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBurglar alarm that triggers a buzzer and sends alerts via IoT\u003c\/li\u003e\n  \u003cli\u003eAutomatic corridor or staircase lighting when someone approaches\u003c\/li\u003e\n  \u003cli\u003eEnergy‑saving fan controller that runs only when a room is occupied\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-wildlife-camera-trap-kit-with-raspberry-pi-5-plus-camera\"\u003eWildlife camera trap that captures photos on movement\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino, ESP8266, ESP32, and Raspberry Pi. The module operates at 5V but outputs a 3.3V logic signal, so no level shifting is needed for 3.3V microcontrollers. Common pairings include relay modules to switch mains appliances, or a buzzer\/LED for simple alert systems.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and OUT to a digital input pin. Avoid placing the sensor near heat sources, windows, or in direct airflow to prevent false triggers. The onboard 3.3V regulator means the module can also be powered from a 9V battery in standalone setups.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and OUT to any digital pin (e.g., D2). Use the digitalRead() function to detect motion.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust sensitivity and delay?\u003c\/summary\u003e\u003cp\u003eThere are two orange potentiometers on the module: one sets detection range (approx. 3–7m), the other sets the output HIGH duration (approx. 5–200s). Turn clockwise to increase the value.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect through walls or glass?\u003c\/summary\u003e\u003cp\u003eNo, PIR sensors need a direct line of sight to detect infrared radiation changes. They cannot penetrate solid objects like walls or glass.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445107843437,"sku":"CDN-0384","price":70.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/hc-sr501-pir-motion-sensor-module-for-arduino-raspberry-pi-4031939.jpg?v=1790779507"}],"url":"https:\/\/compoden.com\/collections\/motion-sensors.oembed","provider":"Compoden","version":"1.0","type":"link"}