Eowave DIY 8 User manual

If you have any questions about the mounting process do not hesitate to
contact me at [email protected]
This kit is not for beginners, you should have soldering skills and
you must know in which direction to put ICs, LEDs & capacitors
Eowave bears no responsibility for mistakes that are made during the
assembly process, or for damage caused to components if they are not
soldered correctly. Read the instructions carefully before starting to
solder. Use the pictures to verify the placement if you have doubts.
Google ‘resistor calculator’ to work out resistor values from the col,our bands,
or better yet use a multimeter
Glue the caps on the switches (the best method is to use hot glue so you
don’t have to wait, otherwise you can use superglue)
Components will take place on 2 sides of the board, the components on one
side, the LEDs and mechanical parts on the other side as follows

Component side
mount and solder in the order of the BOM on the following page. Somer additional notes;
- all the resistors
- ICs (use the socket for the main IC on IC3) do not put the IC (DsPic) into the IC3 socket
before you do your first electrical test
- smaller capacitors
- transistors
- power connector
- large capacitors (C7 and C11)
Hardware side
mount and solder in this order:
- the LEDs - be careful with the LED orientation, the longer positive leg
goes into the wider end of the triangle marked on the PCB
- mount each LED about 2mm from the board
- use one colour for the inner circle, use the other colour for the outer circle
- the big 5mm LED is for the center LED
- once the caps are glued on the switch, solder the 10 switches
- mount the mini jack connectors
- end with the potentiometers
- the 2 pots in the corners are the plastic shaft potentiometers
Tests
Once all components are mounted you can perform an electrical test before you mount the
IC (DsPIC)
Connect the ribbon cable to the power connector noting the orientation, power the unit from
your eurorack case. Measure the voltage on pin 27 and 28 of IC3 socket, you must have a 5V
reading. If yes; disconnect from power and plug the DsPic on the socket. If no check your
soldering.
Now you can make tests before mounting the front panel;
CV LED’s should light up, try each gate switch
The center LED only lights up if a GATE is activated
Check the outputs are sending trigger/CV

Part List
Resistors(
((
((
((
1(
220(
((
R34(
18(
1k(
((
R1,(R2,(R5,(R6,(R10,(R11,(R14,(R15,(R16,(R17,(R21,(
R22,(R23,(R28,(R31,(R40,(R42,(R43(
3(
5k1(
((
R29,(R32,(R39(
19(
10k(
((
R3,(R4,(R7,(R8,(R9,(R12,(R13,(R18,(R19,(R20,(R24,(
R25,(R30,(R33,(R35,(R36,(R37,(R38,(R41(
2(
20k(
((
R26,(R27(
1(
10(
Black(resistor(
L1(
IC(
((
((
((
1(
TL072P/TL082(
((
IC7(
2(
74HC165N(
((
IC1,(IC2(
2(
74HC595N(
((
IC5,(IC6(
1(
28(pin(socket(
((
IC3(
1(
dsPIC33EV64GM102(
Install(after(test(
IC3(
Caps(
((
((
((
2(
4n7(
(Marked(472Z(
C9,(C12(
1(
10n(
(Marked(103(
C13(
8(
100nf(
(Marked(104(
C1,(C2,(C3,(C4,(C5,(C6,(C10,(C11(
Transistors(
((
((
((
4(
2N3904(
Check(orientation(
Q1,(Q2,(Q3,(Q4(
1(
LM7805(
Flat(side(to(PCB(
IC8(
Header(
((
((
((
1(
PINHEAD(
((
POWER(
Electrolytics(
((
((
((
1(
10uf(
Negative(leg(shorter(
C7(
1(
100uf(
Negative(leg(shorter(
C8(
LED(
((
((
((
8(
8(RED(
Use(diagram(for(polarity(
RED1,(RED2,(RED3,(RED4,(RED5,(RED6,(RED7,(RED8(
8(
8GREEN(
Use(diagram(for(polarity(
GREEN1,(GREEN2,(GREEN3,(GREEN4,(GREEN5,(
GREEN6,(GREEN7,(GREEN8(
1(
1(5MM(RED(
Use(diagram(for(polarity(
LED5MM(
Switches(
((
((
((
10(
SWITCH(
((
S100,(S101,(S102,(S103,(S104,(S105,(S106,(S107,(
S108,(S109(
10(
SWITCH(CAPS(
((
((
Jacks(
((
((
((
5(
301S-MINIJACK(
((
CLK,(CV,(GATE,(RESET,(START(
Pots(
((
((
((
8(
((
Metal(
SNAP100,(SNAP101,(SNAP102,(SNAP103,(
SNAP104,(SNAP105,(SNAP106,(SNAP107(
2(
((
Plastic(
SNAP108,(SNAP109(

Component side

Mechanical part side
RED8
GR EEN8
RED7
GR EEN7
RED6
GR E EN6
RED5
GR EEN5
RED4
GR E EN4
RED3
GR EEN3
RED2
GR EEN2
RED1
GR EEN1
S108
S106
S104
S102
S100
S101
S103
S105
S107
S109
CLK STARTRES ET
GAT E
CV
SNAP107
SNAP106
SNAP108
SNAP103
SNAP101
SNAP100
SNAP102
SNAP104
SNAP109
SNAP105
LE D108

Using the Seq 8
You can find an instructional video on how the modes of the Seq 8 work on
the Eowavr youtube channel
Inputs :
Clock in
Reset in
Play in (hi level will stop the internal clock sequence)
Outputs :
CV out switchable between 0-5 V & 0-10V
Gate out 0-5V
10 switches (8 steps, Start/Stop, Mode select)
17 LEDs
10 Potentiometers (8 CVs for step 1 through 8, glide time & clock speed)
The Mode switch allows you to select 6 different modes
Each switch press cycles to the next funtion, as described below
1. GATE ON/OFF (outer circle LED)
2. SLIDE ON/OFF (inner circle LED)
3. RESET (the 2 LEDS are blinking)
4. REPEAT : the switch has 4 positions (it sets how many times each
step is repeated. 1 (no LED)- 2 (outer circle LED) - 3 (inner circle
LED) 4 (both LEDs)
5. DIRECTION 1 forward, 2 backward, 3 ping-pong, 4 random
switch, 5 set the voltage to 0-10V
6. SCALES , 7 different scales are possible:
1 no scale
2 chromatic
3 major
4 minor
5 pentatonic major
6 pentatonic minor
7 major chord (I III V)
8 fifths (I V)