Instructions

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 Zwolle
the Netherlands www.arexx.com
Piano Board Title:
Drawn by: Checked by:
Document number:
RevisionSheet ofDate:Size:
A3 BSC - 1.01 1
ARX_003_01_SCH
01-08-2017
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 mi
S13 fa
S14 fa#
S15 sol
S16 sol#
S17 la
S18 la#
S19 ti
S20 do.
S21 do#.
S22 re.
S23 re#.
S24 mi.
S25 fa.
PA0 PA1 PA2 PA3 PB1 PB2 PB3PB0
R1
330R
R2
330R
R3
330R
R4
330R
R5
330R
R6
330R
R7
330R
R8
330R
Sound Chip
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
Volume up
S26
Volume down
PC0 PC1 PC2 PC3 PD0 PD3
GND
GND-R
R9
470R
S30
Tempo Up
S31
Tempo Down
S28
Record
S29
Playback
S32
OK/ON
S33
Stop
S27
Cymbal/Frog
PA0 PA1 PA2 PA3 PB0 PB1 PB2PB3 PC0 PC1 PC2 PC3
PD0 PD1 PD2 PD3
VDD VDD VDD
VDD
VDD
GND
GND
DAC PP1 PP2
S35
Demo
Buttons
Sound Chip
Power Entry Amplifier
C1 100n
R12
470R
C5 100n
R11
10k
R13
1k
GND
GND
DAC
AMP-IN
LM386
GAIN
1
-INPUT
2
+INPUT
3
GND
4
VOUT
5
VS
6
BYPASS
7
GAIN
8
U2
GND
AMP-OUT
C8 100n
C7 100n
GNDGND 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
Pedal Hi-Hat/Duck
S39
Snare Drum/Dog
S40
Bass Drum/Bird
S37
Percussion Switch
S41 Piano
S42 Guitar
S43 Organ
S44 Violin
S45 Trumpet
S46 Slow Rock
S47 Rock
S48 Twist
S49 Cha Cha
S50 Samba
PD1 PD2
R14 10 Ohm
9. SCHALTPLAN