This circuit was obtained from a 1965 Radio Electronics. The semiconductors used admit modern equivalents. The high voltage coil is an automobile ignition coil.
This receiver for infrared remote control was found in the Philips Databook of 1990, The circuit...
This circuit was found in the June 1985 issue of Radio Electronics magazine. The idea is to use a...
This circuit from a 1967 publication turns a short pulse into a square signal whose duration...