Using CMOS circuits and operational amplifiers of the time, this circuit was found in the September 1977 issue of Radio Electronics magazine. The circuit is powered by a 15 V power source.
May 2017 - Panasonic's new APS1 series of optical couplers with 3 750 V insulation and up to 50...
This circuit can detect both light and shadow using an LDR as a sensor. We found the circuit in an...
This simple megaphone is from old documentation, but uses still current components. The circuit is...