[sdiy] OT? MIDI to RS232 converter box?

Ove Ridé nitro2k01 at gmail.com
Sat Jan 20 19:48:32 CET 2018

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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