This circuit was obtained from an Electronic Design from the 90's. The circuit generates signals at a frequency determined by R and C. The selection by the jumpers determines the PWM modulation.
This non-regulated power supply uses a single secondary winding transformer. The secondary voltage...
Using a small incandescent bulb as a regulator, this Wien bridge oscillator produces a sinusoidal...
The figure presents a configuration that can be very useful for audio equipment designers. What...