This circuit was found in a PE Hobbyst Handbook of 1989. It uses a black light fluorescent of the time. Small fluorescent black light from 1 to 4 W can be used.
This old circuit (1968) uses a germanium transistor to drive a relazy from a switch. The circuit...
This circuit was found in the February 1993 Radio Electronics magazine. The frequency depends on...
January 6, 2016 - Mouser Electronics, Inc. is now stocking the TPS25810 USB Type-C™...