This circuit is from Electronics Now magazine, February 1987. The number of channels is high depending only on the distances of the stations and the losses in the cables.
This circuit was found in an American publication called Ham Radio. The circuit uses still current...
This two-tone alarm siren was found in the January 1975 issue of Radio Electronics magazine. The...
This circuit makes use of a transconductance operational amplifier. It generates signals with TTL...