MULTI MIDI THRU PCB
Manufacturer: antilog devices
Product ID: P-UTL-01
USB powered quad DIN plus triple 3.5mm MIDI thru board. Chainable for 8xDIN, 6x3.5mm, perfect for low latency MIDI to multiple synthesizers and SMT soldering training.
Weight: 35 grams
in stock - expected to ship in 21 days on Oct 6
We are on holiday.
Shipping is delayed, but you can still order.
9.98 €
incl. VAT, excl. shipping
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Bill of Materials / Placement Guide
Label
Package
Name
Part Link
C1
SMT 1206
100n
C3
E2,5-5
33uF
C4
SMT 1206
100n
C5
SMT 1206
100n
C6
SMT 1206
100n
CON1
DIN5 Socket
I1
CON2
DIN5 Socket
O1
CON3
DIN5 Socket
O2
CON4
DIN5 Socket
O3
CON5
DIN5 Socket
O4
D1
DO41-7.6
5817
D2
THT
1N4148
IC1
DIL08
6N138
IC1
DIL08
Socket 8 pin
IC2
SMT SO14
74HC14D
IC3
SMT SO14
74HC14D
IC4
SMT SO16
74HC595D
J2
HDR Shr 10
10 pins
J3
HDR Shr 10
10 pins
JACK1
Audio Jack
3.5mm socket
JACK2
Audio Jack
3.5mm socket
JACK3
Audio Jack
3.5mm socket
LED1
LED 2x3x4 Hor
PWR
LED2
superflux_CC
LED-RGB-CCSUPERFLUX_FLAT
R1
THT
220R
R4
THT
220R
R5
THT
220R
R6
THT
220R
R7
THT
220R
R9
THT
220R
R10
THT
220R
R11
THT
10k
R12
THT
10k
R14
SMT 1206
10k
R15
SMT 1206
10k
R16
THT
220R
R17
THT
220R
R19
THT
220R
R20
THT
220R
R22
THT
4k7
RJ1
THT
220R
RJ2
THT
220R
RJ3
THT
220R
RJ4
THT
220R
RJ7
THT
220R
RJ8
THT
220R
T1
SOT-23
BC818-16-NPN-SOT23-BEC
USB1
THT USB B
USB B Socket
Required Mouser parts
Can be directly transferred into your mouser cart by copying & pasting the text below into the mouser part list import tool (you may need to log in at mouser before the tool is available):
https://www.mouser.com/tools/part-list-import.aspx
80-C1206C104M5R|4
667-ECA-1HM330I|1
806-KCDX-5S-S2|5
511-1N5817|1
512-1N4148TR|1
782-6N138|1
1-2199298-2|1
771-74HC14D-T|2
595-SN74HC595DR|1
517-30310-6002|2
490-SJ1-3535NG|3
660-MF1/4DCT52R2200F|17
660-MF1/4DCT52R1002F|4
660-MF1/4DCT52R1001F|2
603-AC1206JR-0710KL|2
660-MF1/4DCT52R4701F|1
863-BC818-40LT1G|1
538-67068-7041|1
Required midiphy parts
You can manually add these to your cart using the links below. If you are buying a midiphy essential kit, these should be included already. If you are buying plain PCBs, these are necessary to complete your build.
The BOM checker 'bot says:
All parts referenced from the CAD master files have been validated. The BOM should be safe to order!*
* Disclaimer: although we have taken the best care possible, we cannot guarantee 100% accuracy and we cannot be held liable for erroneous orders when using this tool, including (but not limited to) incorrect quantities and/or types of components ordered through midiphy or other suppliers.
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These additional products may be of interest, if you are browsing this product. If you are buying a midiphy essential kit, everything necessary is included. If you are buying plain PCBs, please check if any of these products may be helpful for your build.
Photo Tutorial
Step 1

Let's build the MULTI MIDI THRU PCB!

It will be a good SMT soldering exercise and contains many relevant parts used in more complex midiphy projects.

It will also be a very helpful tool in your MIDI studio. The MULTI MIDI THRU allows to connect:
up to four standard DIN MIDI devices/synthesizers

up to three modern TRS (3.5mm jack) MIDI devices


You could also chain two MULTI MIDI THRU boards (perhaps more!) using the onboard shrouded headers for eight + six MIDI THRUs with minimal latency.
Step 2
First, bend the superflux LED pins into a gullwing shape as shown. Ensure that you use an ESD antistatic wriststrap to ground yourself before working with the LED. It's best to bend using a tool like a flat-head screwdriver to avoid straining the bond wires within the LED.
Step 3
Insert the LED as shown on the rear of the PCB. Note that the common cathode pin within the acrylic package is physically larger than the three anodes and connects to the LED center. This can be verified with a digital multimeter in diode mode: the LED colors should light up when the black probe (-) is on the cathode. Check that the bent gullwing leg goes to the lower-left pin marked as "CC", not to pin 3 in the opposite corner!
Step 4
Set your soldering iron to 300°C and heat the PCB pad first (not the LED pins) when soldering the superflux LED. Solder for only two or three seconds to avoid overheating the LED.
Step 5
That's how the superflux LED should look after soldering. Note that when building other midiphy projects, the common pin will sometimes be bent differently or soldered in later.
Step 6
Solder 100nF 1206 SMT capacitors in C1, C4, C5, C6. Disregard any "1n" silkscreen label for C6, it should be a 100nF cap.
Step 7
Solder T1, the BC818 SMT transistor.
Step 8
Solder IC2 and IC3, the 74HC14D hexinverters. A good practice is to tack one of the corner pins and then correct the position before completing the other pins. Visually check for good solder joints that bond the pin to the pad and also check for unwanted shorts between adjacent pins with a magnifying glass. If there are problems, they are easy to fix now, but it gets more difficult once the DIN sockets are installed.
Step 9
Install the 74HC595D output shift register in IC4. As noted in the previous step, check all pins with a magnifying glass before continuing with the next step.
Step 10
Install R14 and R15 - use 10k 1206 resistors and disregard other value indicators.

Note:
If you want quicker superflux LED MIDI data indication, replace R15 with a 1k resistor. This will speed up the superflux update rate from ~3Hz to ~30Hz.
Step 11
Install D2, a standard 1N4148 THT diode.
Step 12
Install 220R THT resistors in R1, R4, R5, R6, R7, R9, R10, R16, R17, R19, R20, RJ1, RJ2, RJ3, RJ4, RJ7, RJ8.

There are two known implementations for TRS MIDI:
For the "Korg" standard (Type A), use the round solder pads for RJs.
For the "Arturia" standard (Type B), use the square solder pads for RJs.

The MMA has adopted "Type A" as a standard for the MIDI specification, so in case of doubt, it is probably advisable to use this variant.

Mixing the two standards is possible as long as each pair of RJs uses the a single configuration.
Step 13
Install 1K THT resistors in R3 and R18.
Step 14
Install a 4k7 THT resistor in R22.
Step 15
Install 10k THT resistors in R2, R8, R11 and R12.
Step 16 - optional
Install the 1N5817 "reverse polarity protection" diode in D1 if you plan to use the J1 power header.
Step 17
Install the 2x3x4mm LED as shown.
The longer LED leg is the anode and goes into the rear pad marked with a curve on the PCB. The pad close to the PCB edge is the cathode and is marked with a flat line - the shorter LED leg goes in there.
Step 18
Install the 8-pin IC socket for IC1. Align the notch of the IC socket with the notch on the PCB silkscreen.
Step 19
Install the USB socket at "USB1".
Step 20 - optional
Install the 3-pin header close to the bottom of the board. You can use this header to supply 5V to the PCB instead of using the USB port for power.
Step 21 - optional
Install the 2x5pin shrouded header on J3.
You only need to install it if you want to chain two (or more) MULTI MIDI THRU PCBs.
Step 22
Install the 3.5mm jacks in JACK1-JACK3.
Step 23
Install the polarized 33uF cap at C3.
Ensure that the side marked with (-) is aligned as shown.
The longer pin on the other side of the cap goes into the (+) pad (marked on the silkscreen).
Step 24
Install the 5-pin DIN sockets in CON1-CON5.
It is recommended to "tack" one pin of each first, then to check that all sockets are properly aligned. If they are misaligned or sitting off the board, reflow the necessary pad(s) before continuing on with the remaining pins.

Note: install a shrouded 2x5 IDC header in CON1 for additional chained boards.
Step 25
To finalize the build, install the 6N138 optocoupler as shown - align the marked side with the notch on the IC socket. It is likely you'll need to straighten the pins by carefully bending them back towards the IC body.