Found in a 90's EDN, this circuit can be used as a shield. The components depend on the MOSFETs and the load that must be controlled. The logic is TTL.
The integrated circuit MC1408 / MC1508, consists of an 8-bit digital / analog converter from...
This circuit controls a relay from the light incident on a sensor. The sensor is an LDR and the...
This circuit has its frequency controlled by a 1MHz crystal. The circuit can be powered by...