Found in the December 1986 issue of Radio Electronics magazine, this circuit is designed to select 4 outputs with pulses from a pressure switch. The circuit includes LED indication.
This circuit makes the RIAA equalization for signals obtained from a turntable for signal recovery in other...
The integrated circuit used in this 90's circuit is not common today, but the configuration can be...
Another application circuit for the NE567 is shown in the figure. It consists of a decoder for...