This circuit makes use of a stroboscopic tube, a component that no longer exists today. The circuit is from the 70's and can be adapted to use mains voltage.
The indicated circuit performs a slow charge of 12 V batteries maintaining a constant current of...
This simple transistor tester was found in a Japanese magazine in 1967. It tests general purpose...
This toy transistorized organ was found in the May 1970 issue of Radio Electronics magazine. The...