Motion Detection Module MR-HW08KT for Home Automation
MR-HW08KT PIR Motion Detection and Switching Sensor Module for Home Automation
The MR-HW08KT is a passive infrared (PIR) motion sensor module designed for home automation and security applications. It detects infrared radiation emitted by moving bodies, triggering a relay output that can switch connected loads like lights or alarms. This compact module integrates sensitivity and time-delay adjustments, making it easy to deploy in a variety of indoor projects.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 5Vā12V DC |
| Detection Range | Up to 5 meters |
| Detection Angle | 120Ā° cone |
| Output Type | Relay (NO/NC) |
| Delay Adjustment | 5ā300 seconds |
| Sensitivity | Adjustable via potentiometer |
What You Can Build With This
- Automatic hallway or staircase lighting that switches on when motion is detected.
- DIY home security alarm that triggers a siren or notification when a person enters a room.
- Smart pet feeder that dispenses food when your pet approaches the bowl.
- Hands-free appliance control for fans or lights in workshops or garages.
Compatibility
This module works seamlessly with Arduino, Raspberry Pi, ESP8266, and other 5V microcontrollers via its relay output. It can control AC/DC loads directly (up to 10A at 250VAC or 30VDC). For logic-level monitoring, the relay side should be isolated if connecting to sensitive boards; consider using an optocoupler if driving inductive loads.
Wiring Notes
Connect VCC and GND to a 5Vā12V DC supply. The relay output has three terminals: Common (COM), Normally Open (NO), and Normally Closed (NC). For typical switching, wire the load between COM and NO. The detection signal is also accessible on the digital output pin (TTL level) for directly interfacing with microcontrollers. Ensure the power supply can deliver at least 200mA for reliable relay operation.
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, the MR-HW08KT can be powered from the Arduino's 5V pin, and the digital output can connect directly to any GPIO for motion detection. Use the relay for switching heavier loads.
Can I adjust the distance it detects motion?
The detection range is affected by sensitivity, which is adjustable via the onboard potentiometer. For maximum range, ensure the sensor is unobstructed and set to highest sensitivity.
What is the power consumption when idle?
The module typically consumes less than 50mA in standby mode, making it suitable for battery-powered projects when using efficient power management.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā 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 ā it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 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