CIRCUITRY KEYBOARD
ELECTRONIC CIRCUIT EXPERIMENT KIT
Piano with Four Groups of Keyboard-Activated LEDs and Brightness Control
38
Piano with Four Groups of Keyboard-Activated LEDs and Volume Control
39
DID YOU KNOW?
1
st
Digit
0
1
2
3
4
5
6
7
8
9
2
nd
Digit
0
1
2
3
4
5
6
7
8
9
Color
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White
Gold
Silver
Multiplier
1Ω
10Ω
100Ω
1KΩ
10KΩ
100KΩ
1MΩ
0.1Ω
0.01Ω
Tolerance
0
±1%
±2%
±0.5%
±0.25%
±0.1%
±0.05%
±5%
±10%
X
11
12
9
10
7
8
5
6
28
29
27
39
37
38
40
36
37
42
43
44
45
46
2
1
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
40
38
39
41
23
24
3
4
11
12
9
10
7
8
5
6
39
37
38
40
36
37
42
43
44
45
46
2
1
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
40
38
39
41
23
24
3
4
28
29
27
16
15
1KΩ
4-23 • 24-28-40 • 39-38 • 37-2 • 1-36 • 29-12-10-8-6 • 5-42 • 7-43 • 9-44 • 11-45 • 41-3
4-23 • 24-40-6-8-10-12 • 11-45 • 9-44 • 7-43 • 5-42 • 2-37 • 36-1 • 38-16-29 • 28-39 • 41-27-15-3
Turn on the Main Switch. Whenever a piano key is played an LED will light up. Each set of four keys is grouped with an LED and their
brightness can be adjusted by turning the knob on the Variable Resistor.
Slide on the Main Switch. Whenever a piano key is played an LED will light up. Each group of four keys is grouped with an LED. The
volume can be adjusted by turning the knob on the Variable Resistor.
Each of the three resistors on the board has a code printed on it to show its
resistance value. Each color band represents a number. Read it left to right with
the silver or gold band last. Those indicate tolerance. Use the chart at right to see
the “secret” code.
The 1KΩ resistor’s bands are: Brown•Black•Red•Gold or
1 0 (x) 100Ω ±5%
10 x 100 = 1,000 which can be written as 1K
Resistors can also have 3, 5 or 6 bands.
