Midibox & DOUT = per-channel level meters?

[Khron]

I've done some googling, but i haven't found anything on this particular topic.I was wondering whether it was possible to employ some DOUT boards to drive some LED strings which would act as level meters.

 

Thing is, a couple years ago i grabbed a dead Behringer DDX3216 from eBay, with the intention of scavenging the motorfaders, encoders etc. for a DIY Midibox-based DAW control surface.

Fortunately, the schematics for the whole unit were quite easy to find, and i started thinking that maybe the whole top of the unit could be repurposed. The motorfaders and LED strings for each channel are on the same PCB, so i figured it wouldn't be a bad idea to "recycle" the whole thing, with minimal labor (desoldering, new PCBs etc).

Edited January 13, 2017 by Khron

[latigid on]

Probably doable! You might find the LEDs are arranged in matrices, so DIO modules could be more helpful, but DIN/DOUT chains work just as well. If you post the parts of the circuit you want to use it will be easier to see/offer suggestions.

[Khron]

I thought / hoped it would be feasible :) The service manual can be found here:

https://elektrotanya.com/behringer_ddx-3216_sch.pdf/download.html

 

It's been a while since i've looked at the schematics, but i might not even need any DOUT (or DIO) modules. That is, assuming i can "mold" the data stream into the necessary format.

The channel level meters are on pages 24-26, driven through a bunch of 74HC595's. The interesting part is, the directions of the LEDs are alternating, so hopefully flipping every 2nd bit shouldn't be too complicated.

[ilmenator]

Thanks for the link!