This thermal control circuit appeared in Radio Electronics magazine in October 1958. The circuit is powered by the power grid and has two sensors that operate in a differential mode.
This bistable touch circuit using CMOS technology controls a relay. The supply voltage must be...
This project is from the book Science Fair Projects by Newton C. Braga. In it we have a relay that...
This circuit was obtained in an old documentation, but it is still current by the used components....