This cassette player motor speed control was found in the January 1991 issue of Radio Electronics magazine. The circuit is for voltages from 9 to 12 V.
This circuit generates rectangular and triangular signals up to a few megahertz. The circuit is...
This circuit is from a documentation from the 50's. The transistors are made of germanium. The...
This circuit was found in a 1967 Electronic Design. The circuit makes use of components from the...