Found in American documentation from the 90s, this circuit can be used as a shield with the replacement of the output optical coupler. The operational also admits equivalent.
This interesting configuration of optical triggering using an oscillator was found in a 90s...
This circuit works with only 1.5 V and can be powered by a solar panel. The circuit is from 1991....
This circuit periodically reverses the rotation of a motor to change the position of eggs in an...