We found this circuit in a 1963 Radio Electronics. It can be used for remote control. The frequency depends on the coil and the power is supplied by a single battery.
Developed by Philips this 60's circuit uses a transistor of the time, but the configuration holds true for...
This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any...
This sophisticated audio compressor was obtained in a documentation from the 70s. The transistors are of...