This circuit is from a 1990 Modern Electronics magazine. In the original there are some problems to be considered that the voltage drop in SCR2, which can be a TIC106. Thus, it may be necessary to use a higher voltage in the supply with the exchange of R29. The circuit directly controls a load on the 110 V (117 V) AC network and the power depends on the triac, which can be any of the TIC series.
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