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Boss DR-55 MIDI Sync
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DickyKnee



Joined: Mar 30, 2014
Posts: 5
Location: Thailand

PostPosted: Tue Apr 01, 2014 11:34 am    Post subject: Boss DR-55 MIDI Sync
Subject description: Retrofitting a Boss Dr.Rhythm DR-55 to sync to MIDI
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Hi all,

Many years ago I built a MIDI sync circuit for a Boss DR-110. The DR-110 has very little room inside the case, so I just put together an external dongle.
This is the DR-110 here:
http://pdp7.org/boss_dr_sync/bossdr110.html

Afterwards, I purchased a DR-55 and went about doing a similar retrofit. I just modified the code a little and (like the DR-110) installed an external dongle.
This is the DR-55 here:
http://pdp7.org/boss_dr_sync/bossdr55.html

and it has been serving me well, up until my last house move I broke the dongle off the DR-55 at the D9 connector on the chassis. When i went to repair it, I thought "I recon, that PCB will fit inside the case".

There were 2 high profile parts on the PCB that needed to be (re)moved to clear the foot switch:
1. The vertical 100mil pitch connector was removed and the wires soldered directly to the board. I don't like soldering flex wire directly to PCBs, but this was the only way it was going to fit. I bodged a bit of hot glue on there for mechanical support.
2. The electrolytic capacitor needed to be relocated.

The MIDI In & MIDI Out both come to the D9 connector, but the cable I made up is In only (this is the way I use it)

The fit was tight, but I got it in there. Overall, it now looks more neat on the outside. Inside, to do it better needs a PCB redesign, which I'm not planning on doing.


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DickyKnee



Joined: Mar 30, 2014
Posts: 5
Location: Thailand

PostPosted: Tue Apr 01, 2014 11:54 am    Post subject: Reply with quote  Mark this post and the followings unread

some more pictures.


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