Ambient light also affects the output voltage. In my case, it was only about ±0.1V, but the sensor may need to be shielded from outside light sources if it is a problem. The LM741 is applied as a ...

It is based on the working of the popular IR sensor Module TSOP1738 which senses ... LM311 is a precision voltage comparator. It looks like the common Op Amps like LM741, CA3130, CA3140, TL071 etc.