Doboz XIIO User manual
ASSEMBLY
INSTRUCTIONS
-------------------------------------------------
THE INSTRUCIONS BELOVE SERVES AZ A ROUGH GUIDE TO BUILD YOUR MODULE
IF YOU ARE A CONFIDENT BUILDER FEEL FREE TO FOLLOW YOUR USUAL METHODS
START WITH COMPONENTS
AROUND POWER CONNECTOR:
D4, D5 - 1N5819HW diodes (SOD123)
L1, L2 - filter beads (0603, if you can't get them substitute with 10R resistors)
IC1 - LM1117DT-5.0 (TO252, 5V voltage ragulator)
C9, C10 - 47uF/35V (PANASONIC D)
C8 - 22uF/25V (PANASONIC C)
POWER CONNECTOR - 2x5 eurorack power connector, preferably shrouded
D5 AND D6 IS MISSING FROM THE SILKSCREEN ON YELLOW PCBS,
THEIR ORIENTATION IS SHOWN BELOW
STEP 1
PAGE: 01
CHECK VOLTAGES!
Connect power cable, the red stripe of the ribbon cable must be oriented
on the same side as shown on PCB. Power up the module and check voltages:
+12V @IC4 pin 7, -12V @IC4 pin 4, 5V @IC3 pin 1
INSTALL PASSIVE COMPONENTS:
100nF - C1, C2, C3, C4, C5, C6, C7, C11, C12, C13, C14
220R - R3, R10
1k - R1, R2, R4, R5
4.7k - R12, R13
10k - R7, R8
100k - R6
150k - R11
220k - R9
STEP 2
PAGE: 02
INSTALL SEMICONDUCTORS:
IC2 - CD4096UBM (SO14)
IC3 - MCP4811-E/MS (MSOP-8)
IC4 - CA3140E (DIL8) using socket is recommended!
Q1 - MMBT3904 (SOT23)
Q2, Q3 - BSS138 (SOT23)
STEP 3
YELLOW PCB MODIFICATION:
YOU HAVE TO CUT THE TRACE
BETWEEN Q1 COLLECTOR AND THE NANO
AND REWIRE TO PIN A3
OF THE NANO (BLUE STRIPE)
TRIMMERS AND SOCKETS:
TR1 "V/OCT" - 20k (3296w style)
TR2 "ZERO" - 10k (3296w style)
15 pin socket (x2) - Arduino Nano
12 pin and 6 pin socket - MPR121 breakout board
STEP 4
PAGE: 03
Use breakable sockets.
You can solder Nano and MPR121 board
directly to the PCB, but it's not recommended.
Insert jacks, addressable LEDs, encoder and the included 12 pin header into PCB.
Don't solder them yet!
To line up the encoder with jacks mount an extra nut and washer on its thread.
This will narrow the gap between the encoder body and panel.
Make sure you've got the correct LEDs (two long and two short legs).
The sources in the BOM are tested. An eBay seller used to sell classic
common anode RGB leds as addressable. If you are not sure, please test your LEDs.
Apply +5V through a 100R resistor to the inner short leg, and connect
the inner long leg to ground. Blue light means you've got the correct LEDs,
green means classic common anode RGB leds (not good for you).
Slide front panel onto the jacks and encoder, finger tighten nuts of jacks and encoder,
check alignment, and solder them (jacks and encoder). Make sure the SMD header
is standing on it's place, solder female part to PCB and the outer six pins to the panel,
which are facing the bottom of the module.
Slide LEDs to their places, realign them to same height, solder them. Now remove
the panel, pay attention to the 12 pin header, pull it apart gently, not to rip off the pads
and traces from the back of the panel. Solder the remaining six pins of the SMD connector.
STEP 5
PAGE: 04
DATA IN+5V
GND
DATA OUT
INSTALL FIRMWARE
- download and extract XIIO firmware from www.doboz.audio
- install Arduino IDE and CH341SER driver to your computer
- install FastLED and Adafruit MPR121 libraries
Arduino IDE > Sketch / Include Library / Manage Libraries
- open XIIO_v2_firmware.ino
Arduino IDE > File / Open (Ctrl+O)
- remove Nano from module, connect it to your computer
- select board
Arduino IDE > Tools / Board / Arduino Nano
- upload sketch by hitting the "Upload" button (or Ctrl+U)
- disconnect Nano from computer
STEP 6
PAGE: 05
CALIBRATION
- TURN ON YOUR SYSTEM AND LET IT WARM UP FOR 20 MINUTES
- SET OCTAVE MODE TO LATCHING AND OCTAVE ACTION TO IMMEDIATE
- EXIT SETTINGS, HIT A NOTE PLATE, TUNE IT TO MINIMUM,
STEP DOWN TO THE LOWEST OCTAVE
- PLUG YOUR MULTIMETER INTO THE CV OUTPUT AND TUNE THE ZERO TRIMMER
SO THAT THE VOLTAGE READS AS CLOSE TO 0.000V AS POSSIBLE
- NOW TUNE THE CV OUTPUTS FOR V/OCT SCALING BY
STEPPING UP AND DOWN OCTAVES WITH OCTAVE UP/DOWN PLATES
STEP 7
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