[sdiy] MIDI with +3.3V supply

Seb Francis seb at burnit.co.uk
Sun Nov 16 00:58:29 CET 2008


David Brown wrote:
>
> In your calculation, remember that the driver doesn't pull the output 
> to 0 volts but more like 0.3 volts.

Ah yes, good point.  So in fact 3x 220R are exactly right for 5V

>
> It's worked on everything I've used it with.  Not a single problem.

Good to know.  So it seems it's safe to work with the assumption that a 
MIDI input has 220R and 1.3V diode.

Seb






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