[sdiy] MIDI phantom power...over 5 pin MIDI connector ?

[Jean-Pierre Desrochers]

Thanks for your help Brian !

JP

Le 2015-09-11 15:50, rsdio at audiobanshee.com a écrit :
> Out of respect for your original question, I think the answer is:
> 
> Just hook up a charge pump to pins 2 & 4, using pin 2 as the ground.
> 
> The caveat is that this will not work in all cases. The good news is
> that I mentioned the MAX1595 part that will work even with 3.3 V MIDI
> Out designs. The bad news is that some devices will have a high
> impedance between pin 2 and signal ground, so your device won't work.
> The solution there is to design for external power, maybe with
> protection diodes to allow both options, so that you can power your
> device externally when it fails to steal power.
> 
> Brian
> 
> 
> On Sep 11, 2015, at 12:39 PM, Jean-Pierre Desrochers 
> <jpdesroc at oricom.ca> wrote:
>> Hi again folks,
>> 
>> This DIY request is getting toooooo deeeep for me...
>> I was just asking for any easy solution to do it.
>> Thanks anyway guys!
>> 
>> JP
>> 
>> -------- Message original --------
>> Objet: Re: [sdiy] MIDI phantom power...over 5 pin MIDI connector ?
>> Date: 2015-09-10 07:20
>> De: jpdesroc <jpdesroc at oricom.ca>
>> À: synth-diy at dropmix.xs4all.nl
>> 
>> Hi all,
>> 
>> From my first DIY email request on that subject
>> I'm just trying to 'steal' power from a MIDI out connector
>> using only pins 2 & 4. I know this way I'd lose any GND references
>> but I'm still asking to get new ideas from great people like you guys 
>> !
>> You know, this device could have a floating GND reference.
>> Doesn't matter as far as my final MIDI powered device can cope
>> with it's incoming MIDI signal and send 'enough strong' MIDI info
>> on it's output.
>> 
>> JP
>>