This indicator or VU meter for stereo amplifiers was found in a 90s Radio Electronics. The integrated circuit used is uncommon today.
EDN magazine in a 90's issue published this TTL technology debouncer flip flop circuit, in this...
This circuit produces a 2 kHz tone on a standard piezoelectric transducer. The circuit can be used as...
This circuit can control the speed of Motors up to 2 A and voltages in the range between 3 and 12...