Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The circuit can be modified to trigger a high brightness white LED.
This simple circuit that senses energy cables (alternating current) through the field produced was found...
This interesting game was found in a 1987 publication, but it is very simple and can be easily...
This circuit was found in a 2006 documentation. Its purpose is to control a servo system in which...