Long range IR sensor circuit diagram

In a previous post, I made an Infrared sensor that has a maximum range of only 5 centimeters but my audience want more detector range so I made the circuit for him and for all of you who interesting in DIY electronic project!!!

The circuit use opamp comparator configuration that stable than a previous circuit that I use just two transistors to make the job done. This circuit has detector range about 25 centimeters and can easily adjust detector range easily with a potentiometer(R4 in the below picture). You may need to block strong light expose directly to an Infrared sensor or the circuit will always turn on forever. 
You can find the electronic components details in the above picture and you can see the instruction on my video below.

You can ask any question on the comment box below if you have any question about this project. Enjoy DIY world!!!


  1. i thought the min voltage of 741 was 12 volts split not single 5 volts

    1. 741 can works with split or single power supply same as any general purpose op-amp. I made the circuit as a comparator so it can working with 5 volts power supply.

  2. Can this project be made as an obstacle avoidance


Post a Comment

Popular posts from this blog

How to connect volume control to an amplifier

5 watts amplifier TDA7056A wiring diagram

How to add power supply filter capacitor to amplifier board.

Hall effect sensor wiring diagram and test video

Cellphone white spot on back body repair

Resistor color code

PAM 8403 board amp wiring diagram

10 watts 8 ohms class d amplifier pam8610 sound test

simple bass booster circuit diagram

How to make a simple audio pre-amplifier