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.
Capacitance to voltage converter (CB6075E) This Texas Instruments circuit can be used on a...
This circuit was obtained from an American 80's documentation. The transistors can be 2N2222 and...
This circuit is a small FM transmitter, capable of carrying its signals over short distances...