This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is powered by 3 batteries (4.5 V). The circuit is superheterodyne with an IF of 455 kHz.
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...