MIDI Thru 1in -> 4out splitter PCB or a Kit

Name: MIDI Thru 1in -> 4out splitter PCB or a Kit
SKU: 18793
Price: 4.99 USD
Availability: InStock
Rating: 4.69 (8 reviews)

(8 Reviews)

Basic MIDI 1x4 thru box splitter with optimized schematics

Designed by Deftaudio in United States of America

MIDI Thru 1in -> 4out splitter PCB or a Kit 1

MIDI Thru 1in -> 4out splitter PCB or a Kit 2

MIDI Thru 1in -> 4out splitter PCB or a Kit 3

MIDI Thru 1in -> 4out splitter PCB or a Kit 4

MIDI Thru 1in -> 4out splitter PCB or a Kit 5

MIDI Thru 1in -> 4out splitter PCB or a Kit 6

2019-12-07T05:18:29.772Z-MidiThru4_front2.JPG

2019-12-07T05:18:29.772Z-MidiThru4_back.JPG

2019-12-07T05:18:29.772Z-MidiThru4_top.JPG

2019-12-07T05:18:29.772Z-MidiThru4_front.JPG

2019-12-07T05:18:29.772Z-MidiThru4_PCB2.JPG

2019-12-07T05:18:29.772Z-MidiThru4_PCB1.JPG

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Basic MIDI 1x4 thru box splitter with optimized schematics

This MIDI Thru box is the basic 1 input 4 output splitter which I designed from scratch while not being happy with other options. I actually designed a whole family from the most basic to the complex…

It has optimized schematics for 5V and 3.3V MIDI sender devices, optimized circuitry for optocoupler to minimize false triggering and improve sensitivity. Finally it uses hex inverter with a Schmitt trigger for driving a stronger output signal. This makes it very reliable device. This is an active circuit, so it does require an external power. That’s the way it should be according to the MIDI specs.

There are two options for external power:

To be used with a standard wall adapter 6-12V and 5.5mm*2.1mm connector. In this case a Kit comes with corresponding socket and 7805 power regulator
To be powered from USB port. In this case a Kit includes USB->5.5mm*2.5mm cable, corresponding power socket (so you wont plug wall adapter) and doesn't include 7805. Instead of that you'll solder a jumper Pin 1 and Pin 3. Leave Pin 2 not connected. Please make sure, you use USB port or adapter with 5V output and verify it prior to connecting to the board. There are some QuickCharge USB chargers which can bump a voltage. Please, avoid using them.

Board size and an enclosure choice: Size: 13x5cm

Some of you wondered ideas for enclosure selection. Well, some kits produced here can be installed into cast cases, such as MidiThru-4 or MidiMerge_2in->5out into 1032L enclosure. It requires drilling and some patience. Other boards are just too big to go into typical aluminum case. I found it much easier to put them in between two acrylic panels cut to the size and connect them with plastic standoffs. I typically use M3 standoff 20mm and 5mm. 20mm goes on top, and has enough room to cover DIN5 sockets, while 5mm goes on the bottom. There is CorelDraw file on Github with precise board dimension and holes location.

Another option would be to 3d print the case. Tod Kurt has designed the model and posted it for everybody here.

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Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (4.25)

Shipping: (4.75)

Communication: (4.75)

Dominic | Dec. 26, 2022

Great circuit, easy build

Works as it should. Easy build, solid design. Would buy again. Fast shipper. 5-stars. Made wiring my MIDI controlled guitar rig much easier not having to daisy chain everything. I wish the PCB was a bit shorter, would be nice if it fit in a 125B sized enclosure.

Cooper | Feb. 3, 2022

Amazing & Simple Product and Easy to Assemble Kit!

This is a very simple & affordable project that does exactly what it's supposed to do. I received it in the post relatively quickly and it was packaged up almost too nicely. :P The kit is very easy to put together and could take someone anywhere from 30 minutes to an hour depending on their experience. I did encounter some issues with the BOM (which serves as the documentation), but I was able to figure it out easily. Andrei already got back with me about it and it was a misprint of an older spreadsheet. Only thing I'd recommend changing is something to better describe how the power jumper works right on the silkscreen so there's no guessing about it... and maybe a proper USB-B connector instead of a USB to barrel cable.

Peter | Sept. 7, 2021

Nice little project

I put this together without too much drama. but i do have electronics experience - Other reviewers have stated trouble with component identification and orientation. I was familiar with these issues and just had to double check - anyway, I plugged it in and it worked 1st time - didnt have to troubleshoot. So I now have to think about what sort of enclosure I want to put it in.
Cheers to Deft audio.

Robert | April 19, 2021

Simple, Cheap and Works

This MIDI Thru 1in4 does the job well. I'm not a musician so I can't comment on fidelity, or on longevity, but it works for me just great and don't notice any flaws. The build itself was easy. I appreciate that and it's very low cost, making it easily attainable on a budget.

I have a beatstep pro as a master to the MIDI 1in4, then 4 Thru to 4 other Arturia gear, with sequencers, and a TD-03. I set sync to midi on all devices except the BSP (Int), which allows me to start/stop all other devices, but still control each device's sounds independently. Or change sync and control most everything from the BSP. The 1in4 made this all very easy. I was nervous at first, because I had read of a few issues with getting things synced, but I had no issues and I'm pretty stupid when it comes to music, much less MIDI (I get the gist lol).

Ronald | April 15, 2021

Excellent easy project.

High quality board, helpful documentation. Had this put together and running in my rig in less than 30 minutes!

Dmitri | Jan. 8, 2021

It was fun!!!

It was fun(to build)
The only sad think that I was over with it in 10-15 minutes. (Very simple kit)
Tested, works great. I have few synths that that don't have midi thru/out... This solved the problem perfectly.
Fast shipping (to Canada) ThankQ

Jim | April 11, 2020

Great product

Super impressed with the quality of the board and kit. Amazing value for all the parts and board and engineering that went into it.

Jacob | March 8, 2020

Awesome

This was my entry into soldering, although I have some background. Amazing first build and saved me some loot, aside from the fact that now I want to go deeper down the rabbit hole! Thanks for cool design and hassle free first experience!

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