This 9-pixel circuit has been implemented with 9 LDRs and can be coupled to a processing system for an elementary artificial eye. The circuit is from Radio Electronics, November 1986.
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...