This flasher was found in an 80's Electronic Engineering but can be easily implemented with modern general purpose transistors. The frequency depends on C1.
Found in a 1968 US publication, this circuit can operate on any power grid. The thickness of the wire...
This simple receiver for listening on the phone was obtained in a 1960 documentation. The circuit is...
This small stereo amplifier is suitable for listening with low impedance headphones with excellent...