This dimmer for incandescent lamps using triac and an LF7237 IC was found in May 1985 Radio Electronics magazine. The circuit supports extension buttons.
This half-wave control was published in the September 1987 issue of Radio Electronics magazine. The...
This circuit can be enabled and disabled by a TTL signal. The relay is a low current reed type and...
This circuit is from the time when the 741 was first introduced. It was published in the February 1971...