October 2018
Beginner
80 pages
1h 30m
English
Content preview from A Beginner's Guide to Circuits
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8THE DIGITAL PIANO
THIS PROJECT’S FOUR BUTTONS PLAY FOUR UNIQUE TONES.
THE CIRCUIT DIAGRAM
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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