Found in Radio Electronics magazine, May 1987. It triggers a xenon lamp from an inductive sensor. The circuit requires 200 to 400 V DC to operate.
This filter rejects 1 kHz signals, being suggested by the manufacturer of the operational...
The circuit presented was found in a Japanese magazine in 1973. The circuit uses transistors of...
This circuit of a 1978 American publication monitors a telephone line by triggering a relay. The...