16
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D
D
C
C
B
B
A
A
AREXX Engineering
Nervistraat
16
8013
RS
Zw
olle
the
Netherlands
w
w
w
.arexx.com
Piano
Board
Title:
Drawn by:
Checked by:
Document number:
Revision
Sheet of
Date:
Size:
A3
BS
C
-
1.
0
1
1
ARX_003_01
_S
C
H
01-08-20
17
PCB
_PCB1
ARX_003_01_010_PCB
PCB
S1
.fa
S2
.fa#
S3
.sol
S4
.sol#
S5
.la
S6
.la
#
S7
.ti
S8
do
S9
do#
S10
re
S11
re#
S12
m
i
S13
fa
S14
fa#
S15
sol
S16
sol#
S17
la
S18
la#
S19
ti
S20
do.
S21
do#.
S22
re.
S23
re#.
S24
m
i.
S25
fa.
PA0
PA1
PA2
PA3
PB1
PB2
PB3
PB0
R1
330
R
R2
330
R
R3
330
R
R4
330
R
R5
330
R
R6
330
R
R7
330
R
R8
330
R
So
un
d
C
hip
PB3
1
PD0
2
PD1
3
PD2
4
PD3
5
VDD2
6
VREG
7
VPP
8
DAC
9
PP1
10
PP2
11
-
12
VDD4
13
VDD3
14
GND
15
-
16
PC3
17
PC2
18
PC1
19
PC0
20
VDD1
21
PA0
22
MODE/PA1
23
SCL
/PA2
24
SDA/PA3
25
PB0
26
PB1
27
PB2
28
U1
S34
Volum
e
up
S26
Volum
e dow
n
PC0
PC1
PC2
PC3
PD0
PD3
GND
GND-
R
R9
470
R
S30
Te
m
po Up
S31
Te
m
po Dow
n
S28
Record
S29
Play
ba
ck
S32
OK/ON
S33
Stop
S27
Cy
m
bal/Frog
PA0
PA1
PA2
PA3
PB0
PB1
PB2
PB3
PC0 PC1 PC2 PC3
PD0 PD1 PD2 PD3
VDD
VDD VDD
VDD
VDD
GND
GND
DAC PP1 PP2
S35
Dem
o
Buttons
Sound Chip
Power Entry
Amplifier
C1
100n
R12 470R
C5
100n
R11 10k
R13 1k
GND
GND
DAC
AMP-
IN
LM386
GAI
N
1
-INPUT
2
+I
NPUT
3
GND
4
VOUT
5
VS
6
BYPASS
7
GAI
N
8
U2
GND
AMP-
OUT
C8
100n
C7
100n
GND
GND
VDD
R14 1k
C10 33n
GND
+
C6
220u
Pad3
Pad4
GND
Pad1
Pad2
GND
D1 Red
R10 1k
GND
+ C3 220u
+
C9
220u
GND
C4 100n
GND
GND
S36
VDD
S38
Pe
da
l H
i-Hat/Duck
S39
Snare Drum
/Dog
S40
Bass Drum
/Bird
S37
Percussion Sw
itch
S41
Piano
S42
Guitar
S43
Org
an
S44
Violin
S45
Trum
pet
S46
Slow
Rock
S47
Rock
S48
Tw
ist
S49
Cha Cha
S50
Sam
ba
PD1
PD2
