This interesting transistor circuit has several effects and an included amplifier. The circuit is monophonic and powered by standard batteries. The number of keys can be changed.
This circuit, found in 2002 documentation, triggers LEDs when a phone call is received. The LEDs...
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...
This control circuit for direct current motors uses a 741 and an operational one of unusual power...