This circuit generates sinusoidal signals from 15 Hz to 15 kHz. The circuit is from Electronics Now magazine from December 1995. The power supply must be dual.
Using bipolar, FETs and unijunction this long-lasting timer can reach 10 hours with good quality...
This 1-transistor circuit for currents up to 50 mA was found in the August 1974 Radio Electronics...
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...