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 circuit is from a 1967 documentation. It consists of a sensor for memories used at the time....
Can be used as a shield, this old American documentation circuit offers digitally selected...
This circuit was found in old documentation, but it adapts perfectly to modern applications with...