We found this circuit in a 1967 El3ectronics World. The transistors are from the era but can be replaced by current equivalents. The circuit is for 5 A loads.
This variable power supply circuit was found in a German publication from the 1980s. The circuit is...
This circuit is suggested by Texas Instruments and is based on a relaxation oscillator with...
In the figure we have a typical Wien Bridge oscillator with AGC. The negative waveform is sampled by...