This circuit was found in an Electronic Design. It makes use of a relaxation oscillator to trigger an SCR and two relays. The circuit operates at frequencies of 12 to 180 cycles per minute.
This circuit consists of a constant current source for charging 12 V batteries. The charge is...
This simple neon lamp power indicator circuit was found in the January 1971 Radio Electronics...
We found this sophisticated meter circuit in an article in Radio Electronics magazine from June...