This 2002 documentation circuit is suitable for automotive use. The circuit is based on an integrated that is not common today and has a medium power stage with a BD135.
This Morse code practice circuit produces a tone at the speaker whose frequency depends on C1 and...
Similar metronome settings can be found at several points in this section. This was taken from a...
With this circuit it is possible to receive signals from the 150 MHz band on common AM radios for...