CIRCUITRY KEYBOARD
ELECTRONIC CIRCUIT EXPERIMENT KIT
Piano with Keyboard-Activated LED and Volume Control
35
Slide the Main Switch to “on”.
Whenever a piano key is
pressed, the Red LED will light
up. The piano’s volume can be
controlled with the Variable
Resistor.
Piano with Four Groups of Keyboard-Activated LEDs
37
Slide on the Main Switch.
Whenever a piano key is played
an LED will light up. Each
group of four keys is linked
with a single LED.
Piano with Variable LEDs and Volume Control
36
Turn on the Main Switch. The
Red and Green LEDs will light
up. Whenever a piano key is
pressed, the Blue and Yellow
LEDs will come on. The piano’s
volume can be controlled with
the Variable Resistor.
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
5
6
28
29
27
16
15
1KΩ
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
9
10
7
8
23
24
40
38
39
41
36
37
42
43
44
45
46
VCC
POT1
POT2
SPK1
SPK2
LED1
LED2
LED3
LED4
LED5
GND
2
1
3
4
5
6
11
12
28
29
27
16
15
1KΩ
