This circuit uses a contactor having been found in a 1987 publication. More modern equivalent devices may be used. The circuit has neon indicator lamps.
This low Power output stage can source a fraction of watt to a small loudspeaker. The transformer...
This circuit uses a triac to detect the level of a reservoir, and a sensitive SCR connected to the...
EZP-Q metallized polypropylene capacitors from Panasonic's can be purchased from Mouser...