This circuit was found in a 90s American publication. The same configuration appears in several places on this site, obtained from different sources. The lamps can be replaced by LEDs.
This sophisticated sinusoidal audio signal generator uses a Wien bridge configuration with an...
The circuit shown in the figure makes it possible to control a stepper motor via the serial port...
This circuit was found in a documentation from the 60s. The drive transistor is a power...