Build this simple electronic metronome. Tempo variable between 40 and 250 bpm (beats per minute) . Sound + led display for time signature.
Circuito de metronomo electronico.

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other projects:
* make your printed circuit without iron/laminator:
   • Heatless (cold) Toner Transfer (for PCB)  
* make a 10 year led flasher (on 1 AA cell):
   • 10 Year LED flasher + PC-board  
* make a 512 color (random) led flasher :
   • 512 color LED flasher (random)  
* etch your PCB with the sponge method (fast!) :    • Printed Circuit  Board Sponge Etching...  

Music album:
https://spoti.fi/341Ns1V