Arduino Tutorial 38- IR Infrared Obstacle Avoidance Sensor With Arduino

Let's take a look at Infrared Obstacle Avoidance Sensor Module, it's working, and how to connect it with Arduino.
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[@TUTUTUTTATTAATYUUTTYU]

I have a problem i am using a arduino nano and a port COM3 on your arduino IDE your HIGH and LOW chanched blue mine didn't and it doesn't work so i think it has be that can you fix this?

[@pollycat5166]

informative for an easy intruder alarm.

[@EnjoyMechatronics]

Glad you think so!