Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS components. The circuit has a CMOS amplifier stage that drives a small speaker.
This SANYO circuit has a typical input resistance of 1ook9 and excites a load with a resistance of 5.1k...
This circuit was obtained in a 1989 English magazine. Despite using a fixed 5 V regulator, it can...
We found this speed control for miniature cars in an American publication from the 70s. With...