Circuit can emulate an electronic piano with an NE555 IC
PCB: [ Ссылка ]
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Components list:
1x NE555
1x Buzzer
1x LED (any color)
1x 10uF Electrolytic Capacitor
1x 100n Polyester Capacitor
9x 1K Resistors
1x Trimmer 10K
8x Button

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WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals.

#Keyboard #Electronic #NE555

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