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H9 modification for MIDI power

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nickrose's picture
Eventide Staff
nickrose
Joined: Jan 17 2008
Posts: 4538

H9 modification for MIDI power

nickrose (Eventide Staff)
March 29, 2019 - 11:11 am

Some product, for example, those from MIDI Solutions, rely on power being supplied by the connected MIDI Output socket.

H9's before Serial 16329 did not supply this power, but a simple modification can be made to remedy this.

Instructions are attached (ignore first page) - soldering is required, but it should only take 5 minutes for a skilled person.

This only applies to H9 - 'Factors do not have this issue.

 

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javiceres's picture
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javiceres
Joined: Jan 10 2010
Posts: 73
javiceres (My Eventide Gear)
December 24, 2019 - 07:14 pm

I had no idea about this
I just assumed MiDi power was a no no
Thanks a lot for all this useful info!!

camn
Joined: Sep 19 2016
Posts: 415
camn
January 09, 2020 - 10:54 am

Would it be practical to send power out the unused pins of the MIDI ~INPUT~?

Cuz I could get behind self-powered MIDI controllers.

 

nickrose's picture
Eventide Staff
nickrose
Joined: Jan 17 2008
Posts: 4538
nickrose
January 30, 2020 - 10:28 am

Alas, the H9 does not have enough spare power to do this. It would also be pretty non-standard.

Some products, including our Eclipse, send out power on pins 6 and 7 of a 7 pin DIN, but the H9 only has 5 pin DINs. Further, the voltage and polarity of this power is unspecified, and it would need a special cable.

You could hard-wire your H9 and make as special cable....

 

camn
Joined: Sep 19 2016
Posts: 415
camn
January 30, 2020 - 11:05 am

fine. Ill use standard wiring :(

 

wouldn't that be elegant though?

camn
Joined: Sep 19 2016
Posts: 415
camn
June 06, 2020 - 11:58 pm

Also why do people need a 7-pin cable to include back-voltage... When a MIDI input only needs 3/5 leads?

WHO DESIGNED THIS STANDARD AND WHERE CAN I FIND THEM