@▷ Mini Metronome by 555 | Diagram for Schematic

Mini Metronome by 555

Linear scale – Small size
40 to 208 beats per minute

* Q1 & Q2 provide linear frequency operation of IC1 following P1 resistance variation.
* Q3 was added in order to obtain a louder click, similar to clockwork metronomes.
* A 12V micro battery was used to obtain a higher output power and more compactness.
* Rotate P1 fully towards R2, then set R1 to obtain 40 beats per minute (compare with another metronome).
* Rotate P1 fully towards R3, then set R4 to obtain 208 beats per minute.
* Finally mark the entire scale with the usual metronome steps, as follows:
40 – 42 – 44 – 46 – 48 – 50 – 52 – 54 – 58 – 60 – 63 – 66 – 69 – 72 – 76 – 80 – 84 – 88 – 92 – 96 – 100 – 104 – 108 – 112 – 116 – 120 – 126 – 132 – 138 – 144 – 152 – 160 – 168 – 176 – 184 – 192 – 200 – 208.

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