This circuit generates sinusoidal signals between 300 and 3000 Hz. We find a 303 Circuits from the 90's. The operational ones are types with FET. The power supply must be symmetrical.
Found in a 90s Popular Electronics, this circuit fires an old flash of xenon from the pulse of...
Other operational amplifiers can be used on this unit gain amplifier. The circuit is from the 1993...
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...