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.
September 2017 - Mouser Electronics announces the availability of new MIC28514T series DC-DC...
This circuit uses as a sensor a thermocouple to detect air flow. We found this circuit in a 1980s...
The circuit shown was found in Intersil documentation from the 90s. The formula allows to...