Using one unijunction transistor and two bipolar transistors, this circuit generates a signal from 25 Hz to 3 kHz. The circuit is from Electronics Now magazine, January 0, 1994.
This circuit is from an old National Semiconductor component manual. The circuit can be...
Found in Radio Electronics from the 90s, this circuit uses components from that time. However, it...
This circuit has been found in older telecommunications documentation. The circuit switches off after...