This circuit found in a 90s Popular Electronics, triggers a huge array of LEDs from the sounds captured by a microphone, thus generating visual effects.
) The integrated circuit used in this control is uncommon today and the maximum current obtained allows...
The purpose of this circuit found in a 1994 documentation is to drive a 24 V motor. The circuit...
Found in an American transistor documentation from 1954, this 4-transistor amplifier uses the...