CIRCUITRY KEYBOARD
ELECTRONIC CIRCUIT EXPERIMENT KIT
Piano with Keyboard-Activated LED
32
Piano with Multiple LEDs
33
Piano with Keyboard-Activated LED and Brightness Control
34
23
24
40
38
39
41
36
37
42
43
44
45
46
2
1
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
3
4
11
12
23
24
40
38
39
41
36
37
42
43
44
45
46
2
1
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
3
4
9
10
7
8
5
6
28
29
23
24
3
4
40
38
39
41
36
37
42
43
44
45
46
2
1
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
11
12
7
8
9
10
5
6
4-23 • 24-12-40 • 39-38 • 37-2 • 1-36 • 11-46 • 41-3
4-23 • 24-10-8-6-40 • 39-38 • 37-2 • 1-36 • 9-46 • 41-7-5-3
4-23 • 24-10-8-6-28-40 • 39-38 • 37-2 • 1-36 • 29-12 • 11-46 • 41-9-7-5-3
Turn on the Main Switch. Whenever a
piano key is pressed, the Green LED will
light up.
Slide the Main Switch to “on”. The Red
and Blue LEDs will light up. The Yellow
LED will light up whenever a piano key is
pressed.
Turn on the Main Switch.
The Red, Blue and Yellow
LEDs will light up.
Whenever a piano key is
pressed, the green LED will
light up as well. Its
brightness can be controlled
with the Variable Resistor.
