This synthesizer circuit was found in a Radio Electronics magazine from May 1983. The circuit uses common components and does not require a balanced power supply.
With the coded activation of the relays, it is possible to control which of the 16 outputs...
The integrated circuit used in this application is not very common. Transistors and resistors...
This simple circuit makes use of neon lamps to indicate the voltage of a power grid. The lamps are...