This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The circuit generates a 1000 Hz modulated 10 Hz signal. The signal must be applied to an amplifier.
This circuit causes an LED to flash at intervals determined by C1 and R2 and for a duration given...
Found in a 90's EDN, this circuit provides a current of a few tens of mA. The circuit can generate 15...
This circuit, of a Popular Electronics of 1969 is destined to firing a gas LASER of the time. The...