This circuit is from NASA documentation from the 1980s. The circuit shows how to obtain a stable optical coupler system. The circuit can be used as a shield.
Found in a Hands On Electronics from the 80's this circuit allows the reading of low resistances in...
The figure shows how to implement an inverter trigger using the LM3900. The LM3900 is a NORTON...
This stepper motor control was originally designed to use a PC's parallel port and is quite simple...