This circuit is from an Electronic Design from the 90's. The circuit has excellent gain and must be powered by a symmetrical power source.
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...