This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be fitted with heat sinks.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
Found in a Popular Electronics from the 90s, this circuit uses common components with several...
This circuit is from the 80's but uses common components today. The relay is voltage sensitive...