Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to obtain now as it is of the era. The circuit is intended for FI ceramic filter circuits.
This power supply can provide 10 A currents. Its regulation is made by 7812 integrated circuit. The...
This circuit using an Unijunction Transistor produces a 240 Hz saw tooth signal. The frequency...
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...