This sophisticated metronome has accented tones for better use. The circuit is from Radio Electronics from December 1985. The amplifier stage is provided.
Because it uses TTL integrated circuits, this siren must be powered by 5 V or as indicated with D1 to...
The correct connection of speakers and tweeters in a speaker to obtain better sound quality,...
The CMOS PLL used on this circuit is not very common. The circuit can be used to take out contact...