Teensy 4.1 MIDI Breakout board 8in 8out USB host DIY kit midithru box interface

Description

Enjoy MIDI Breakout board for your Teensy microcontroller. This board is designed for Teensy4.1 and it's not compatible with other Teensy. If you're looking for similar board for Teensy3.2, Teensy4.0 please, check other products in my store.
The board provides MIDI 8 input / 8 output functionality and USB host. This can be your 8x8 MIDI interface, merger, splitter, filter or whatever else you can imagine. It can also work in conjunction with other USB MIDI class compliant devices. This obviously requires programming Arduino framework with Teensy extensions. Teensy example firmware is provided.
Power is supplied from Teensy, so no external power required.
All Teensy pins are available on extra pin headers. This allows easy expansion if you're planning to add extra LEDs, buttons, OLED display, audio inputs or outputs, etc... You can do that without soldering.
Package options:
This is a DIY Complete Electronics kit: Includes PCB and all electronic but Teensy4.1. Din5 connectors, optocouplers, headers, resistors, diodes, USB socket.
Check BOM list by the link github.com/Deftaudio/Midi-boards/tree/master/MIDITeensy4.1
*Teensy microcontroller is not included with any purchase, you can buy it directly from the manufacturer: https://www.pjrc.com/store/
Board size and an enclosure choice:
Size: 82mmx177mm
Some of you wondered ideas for enclosure selection. 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. You can purchase it as optional accessory or make your own. There is CorelDraw file on Github with precise board dimension and holes location.
Please, consider Github page github.com/Deftaudio/Midi-boards/tree/master/MIDITeensy4.1 for sample firmware. And please, watch a video
youtu.be/66L64EKFRUA  All the best, feel free to ask any questions.
Beginner soldering skills required. That means you have to understand schematics, not just being able to solder two wires together. There are no high expectations, but being able to read schematics and understand polarity of components are quite important.
Shipping:
Item will be shipped by Air Mail on the Same or Next Business day of receiving full payment.
This is international shipping from US. Exact delivery time varies from your location and could be up to 3-5 weeks.
NOTE: Don't be surprised, USPS has increased the shipping cost since Jan 01 2016, so the minimal package costs .50 for the first class international.