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Adjustable PIR Passive Infra Red Motion Detector Module HCSR501

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$4.60 (inc GST) $4.18 (exc GST)
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Product Description

These are ideal for detecting movement across an area, just like motion detectors you would find in alarm systems and so on. 


  • Connect 5V and GND to... 5V and GND pins
  • Monitor the OUT pin with your microcontroller's digital or analogue input pin (etc). This pin will go "HIGH" (3.3V) when motion is detected.
  • The on time delay is adjustable between a few and 200 seconds (use the trimpot labelled CH1 to adjust).
  • Sensitivity is adjusted with the trimpot labelled RL2.


  • Angle of detection - 140 degrees (70° to the left, 70° to the right)
  • Detection distance: 3~7 metres (adjustable)

Please note that the PCB colour may vary between batches, however the pinouts are exactly the same. 

Jumper settings:

If the jumper is put in its bottom position (with the board still facing you and the pins at the top) there is no reset. If it is in its top position (H) it is in auto-reset mode - which means sensor will stay high until the motion stops. After motion is no longer detected the output will go low. If set to o reset (L) the sensor will stop sensing once it has triggered, and stays high for the preset time period.

To choose one of these settings, simply create a solder-bridge between the labelled pad and the pad in the middle, or move the jumper depending on which model you have. Any questions please email support@tronixlabs.com.


When using with an ESP8266 based board by adding around 10K of pull-up resistors between VCC and the output or GPIO pin. Thanks Iain!

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