Found in old documentation, this oscillator operates with high voltage. The diode must be of the appropriate type with low current and an inverse voltage of at least 100 V.
This simple latching alarm circuit using CMOS gates was found in the May 1990 Radio Electronics magazine....
This amplifier for a sinusoidal function generator uses a 741 integrated circuit. The circuit is...
This circuit is from an operating manual from the 1990s. The circuit generates sinusoidal and cosine...