Found in Electronics Engineering, this sophisticated circuit makes use of components that are still common today. The circuit is connected to the output of the stereo amplifier.
CL88020 is a Next-Generation Device Designed for Offline Lighting CHANDLER, Ariz., July 10, 2017 — A...
We found this alarm circuit in a Radio Electronics magazine from July 1990. The power transistor must be...
This circuit was found in a 1965 General Electric publication. The circuit can be adapted to...