The integrated circuit used in this detector is uncommon today. We found it in a documentation from the 70s. Detection is done by an optical camera with LEDs and a photo sensor.
In the figure we have the simple way to implement a voltage reference with an operational one. The...
Found in a Popular Electronics from 1992, this circuit has two output voltages given by the...
This circuit allows the testing of integrated circuits of type 741 (operational amplifier) such as...