[sdiy] OT? MIDI to RS232 converter box?

Richie Burnett rburnett at richieburnett.co.uk
Sun Jan 21 00:31:50 CET 2018

Ftdi also make usb cables with the TTL serial interface chip and associated circuitry fitted inside a slightly fatter than normal USB plug...



Sent from my Xperia SP on O2

---- Ove Ridé wrote ----

>FT232 (and maybe other  USB serial chips as well) can set custom baud
>rates. Using this, it should be possible to directly connect to the
>synth with a terminal emulator, assuming it can set custom baud rates.
>That should completely remove the need for any additional
>"intelligence". All you should need is a breakout board containing an
>FT232 chip, a couple of resistors, and an optocoupler, which could be
>fitted on some protoboard. Beware of fake FT232 chips from eBay,
>though. They may not support all the functionality of the genuine
>On 20 January 2018 at 19:30, MTG <grant at musictechnologiesgroup.com> wrote:
>> I'm looking to BUY a "simple" converter box that takes 5-pin DIN MIDI at one
>> end and on the other true DB-9 serial (at say 38.4kbaud). So this would
>> entail a microcontroller with a couple of circular buffers and 2 UARTs. NOT
>> just a level-shifter-to-current-loop thing.
>> I don't really want to build it from scratch if I don't have to. I don't
>> want any other intelligence, but other baud rates and/or USB virtual serial
>> would be fine. All I can see online is a $600 box and a bunch of
>> etch-your-own board PIC kits. Oh and some DMX ones, but not sure about them.
>> Reason: to run an old EPROM monitor in an old synth. The monitor utilizes
>> the existing physical layer of 5-pin DIN MIDI, but on the host side the
>> monitor is operated via a COM Port Terminal program like TeraTerm.
>> I would have thought there were at least some old half-baked solutions for
>> people that didn't want to pony up the big bucks for a MPU-401.
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