MR-HW08KT Motion Detection Sensor Module for Home Automation Switching
MR-HW08KT Motion Detection & Switching Sensor Module for Home Automation
The 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.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 5V–12V DC |
| Detection Range | Up to 7 meters |
| Detection Angle | 120° conical |
| Output Signal | High (3.3V) when motion detected |
| Adjustable Delay | ~5 seconds to 5 minutes |
| Adjustable Sensitivity | Via on-board potentiometer |
What You Can Build With This
- Automatic room light controller that turns lights on when someone enters
- Security alarm system with buzzer and SMS alert via GSM module
- Smart corridor or staircase lighting for energy saving
- Motion-activated camera or recording trigger
Compatibility
The 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.
Wiring Notes
Connect 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.
Why Buy from Compoden
Every 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 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, 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.
How do I adjust the detection delay and sensitivity?
Use 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.
Can this module directly switch a 230V light?
No, it outputs a low-current signal. You'll need a relay module or SSR rated for mains voltage to switch appliances safely.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items