This circuit was found in a 90s Popular Electronics. It generates tones given by the oscillators and can be changed. The circuit already includes an amplification stage.
This simple Wheatstone bridge uses only passive components. We can calibrate R1 in terms of...
This circuit was found in an American publication from 1968. The transistors are from the time,...
May 2016 - It can be obtained from Mouser Electronics new connectors Ultra-Fit ™ series from Nikex for...