Suggested by an American documentation from the 90s, this circuit generates signals with frequencies determined by the capacitors and calculated by the formula next to the diagram.
This metronome was found in a 1979 publication, but it can be assembled more easily with the BC548...
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
This type of circuit, even with the same configuration, appears several times on this site. The...