Found in a Maxim publication from the 90s, this circuit generates signals from 10 to 25 kHz with a THD better than -80 dB. The circuit makes use components of the time.
This circuit for car engine spot adjustment was found in an 80's Radio Electronics. The circuit...
This circuit triggers a relay when it gets dark, thus enabling the lighting of fluorescent lamps, which...
This circuit that generates signals between 1.5 and 2 kHz was found in a documentation from the...