PIR SENSOR NOT DETECTING THE MOTION. JUST TURNS ON LED WHEN CONNECTS TO THE POWER SUPPLY.


SIR, I bought a simple PIR motion sensor from market. when i connect vcc (input) to the  battery the led gets on. PIR sensor don't detect. what will be possibilities for not working.
PLEASE give me the solution to overcome this problem.

Pablos Casita3 months ago

I had the same problem and didn't mange to get it to work.

iceng3 months ago

Which of the two dozen different PIR sensors are you talking about..

Most PIR sensors have a open collector output which needs a pullup resistor...

PIR-OPTOISO-sw.jpgPIR-017-OPTOISO-sw.JPG
iceng iceng3 months ago

Right... Just click the pic to see the whole image..

Now about a Best Answer - . - . - .