I have bought a “Grove - PIR Motion Sensor”. I have got problem to change a sensor range. I want to detect object to maximum 1 meter. Over this value objects should be ignored.
I removed resistor R4 and I solder potentiometr 2MOhm. The foto resistor is not connected.
How to calibrate the sensor? What value should be of R4 resistor for fixed range 1 meter?
Thanks for help!
I tried it and succeeded.and I follow the process below：
1.Remove the R13 from the PCB board；
2.Add a potentiometer to the corresponding position on the PCB board(As shown below)
Initially estimated for a fixed range of 1 m, the R13 resistance should be 0.188MΩ