8THE DIGITAL PIANO

THIS PROJECT’S FOUR BUTTONS PLAY FOUR UNIQUE TONES.

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THE CIRCUIT DIAGRAM

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THE PARTS LIST

PART

VALUE

DESCRIPTION

R1

1 kΩ

Standard resistor

R2

10 kΩ

Standard resistor

R3–5

1 kΩ

Three standard resistors

R6

100 Ω

Standard resistor

C1

0.1 μF

Nonpolarized capacitor

U1

NE555

555 timer IC

S1–S4

Momentary ON

Four tactile mini-pushbuttons

SPK1

8 Ω

Mini-speaker

ABOUT THE CIRCUIT

In this circuit, you’ll build a musical instrument with four buttons that play four different tones.

To create sound, you need to send an ...

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