This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the power supply must be symmetrical.
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...