This circuit that we found in a 1990 documentation uses an LED as a sensor. The operational amplifier is equivalent to the 741 and the trigger adjustment is made in the potentiometer.
Fully-Certified Software Development Kit Leverages Hardware-Based Calculations to Create Fast,...
This transmitter for modulated infrared remote control was found in documentation from the 90s....
This game aims to make you discover which is the combination of activated switches that make the...