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 Forum index » DIY Hardware and Software » Musical Interfaces
Help with Highly Liquid MIDI THRU Circuit
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hippoPolice



Joined: Feb 12, 2012
Posts: 3
Location: New York

PostPosted: Sun Feb 12, 2012 6:33 pm    Post subject: Help with Highly Liquid MIDI THRU Circuit Reply with quote  Mark this post and the followings unread

Hi Everyone,

This is my first time posting on electro-music.com.

I was wondering if anyone could take a look at the bread board layout I did for Highly Liquid's schematic of a 5 channel MIDI Thru box.

Here are the schematics:
http://highlyliquid.com/support/library/midi-thru-circuit/

This is what I cooked up:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

Am I doing something obviously wrong? I don't have a lot of exp with schematics.

Thank you!
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bubzy



Joined: Oct 27, 2010
Posts: 535
Location: United Kingdom
Audio files: 50

PostPosted: Mon Feb 13, 2012 12:50 am    Post subject: Reply with quote  Mark this post and the followings unread

hi and Welcome to electro-music Smile

what problem are you having with the circuit?
ive only looked very quickly but it seems to be ok.

maybe if you told us whats going wrong we could be more useful Smile

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hippoPolice



Joined: Feb 12, 2012
Posts: 3
Location: New York

PostPosted: Mon Feb 13, 2012 7:13 am    Post subject: Reply with quote  Mark this post and the followings unread

ah. well. i'm not exactly sure.
it doesn't operate.

i'm also not so good at using my multimeter so I can't tell where the exact problem is.
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glacial23



Joined: Apr 30, 2008
Posts: 32
Location: Cleveland, OH

PostPosted: Thu Feb 16, 2012 2:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

In the version of the schematic on Papareil's site, it specifies a 3.3k resistor going to pin 6 of the optocoupler when using a 6n136, rather than the 10k that Highly Liquid's schematic uses.

I know when I build my x0xb0x, I ended up having to use a much lower resistance than the optocoupler/schematic called for - they can be kind of strange sometimes.

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