This is a circuit found in a 1970's Radio Electronics. The circuit works with virtually any triac that must match the load.
We found this circuit in a 1980 documentation. With basic changes, including transistors that were...
This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The...
This source was found in a 1982 American publication, but can be easily assembled using 2N2995 (PNP...