We found this multiple thermostat circuit in July 1980 Radio Electronics magazine. It uses opto-triacs for power control and operates on a 117 VAC mains.
The integrated circuit used is equivalent to the 555 and the transistor can be the BC548. The...
We found this circuit in a 1977 documentation. The XR2206 is not easy to obtain, but it consists of a...
This flasher or neon signal powered by batteries was found in old documentation. The transformer must...