This high voltage oscillator with a neon lamp was found in a 1969 documentation. The circuit is synchronized by pulses of 1 kHz. The power voltage is 160 V.
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to...