We found this 4.5 MHz amplifier for video signals from old analog TVs in the June 1992 issue of Radio Electronics magazine. It uses a 592 integrated circuit.
This polarity test or indicator indicates the polarity of a power line by LEDs. The circuit is...
This is the circuit of a digital clock published in the January 1975 issue of Radio Electronics magazine....
Found in an Elektor from the 90s, this circuit can be powered directly by the power grid. The...