https://github.com/rahji/trsmidihost

A PCB that adds TRS MIDI jacks to the Hobbytronics USB MIDI Host PCB
https://github.com/rahji/trsmidihost

Last synced: 2 months ago
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A PCB that adds TRS MIDI jacks to the Hobbytronics USB MIDI Host PCB

• Host: GitHub
• URL: https://github.com/rahji/trsmidihost
• Owner: rahji
• License: cc0-1.0
• Created: 2022-04-05T18:43:02.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2022-04-05T19:11:10.000Z (about 3 years ago)
• Last Synced: 2025-02-06T02:51:33.296Z (4 months ago)
• Size: 172 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# TRS MIDI Host

A PCB that adds TRS MIDI jacks to the [Hobbytronics USB MIDI Host PCB](https://www.hobbytronics.co.uk/usb-host-midi)

Sorry, I'm being lazy by not including PNGs of the schematic or PCB. Files are in Diptrace format and the Gerber ZIP file is ready to be uploaded to a PCB fab (or [order directly from OSH Park](https://oshpark.com/shared_projects/jurqEN3G)). This board is based on [a schematic from Hobbytronics](https://www.hobbytronics.co.uk/datasheets/ht/USB_HOST_MIDI_Connections.pdf). I have made this board and haven't gotten it to work with the MIDI gear I've got, so you'll have to let me know if it works for you before I get back to the project. 🤷🏽‍♂️

## BOM

* 1 x Sharp PC900V optocoupler. It's discontinued, but I salvaged one from an old piece of MIDI gear. If you substitute, realize that the pinout is likely to be different.

* 2 x Switchcraft 35RAPC4BH3. A bit pricey. Again if you substitute, you'll have to change the PCB layout.

* 1 x 1N914 diode

* 1 x 220Ω resistor

* 2 x 75Ω resistors

* 1 x 9-pin header (2.54 mm pitch), male or female depending on the pins you've got on the Hobbytronics PCB

* 1 x 2-pin header (2.54 mm pitch)