This simple metronome, from 1985 documentation uses only transistors and has two settings. For voltages above 6 V, up to 12 V, replace the BC557 with a BD136.
July 2017 - The Texas Instruments TAS5782M Closed Feedback- Class D Amplfier Evaluation Module can now...
This circuit can be controlled by pin 1 through the output of a microcontroller functioning as a...
Found in a documentation for radio amateurs from the 90s, this circuit is suitable for RF...