16x4 blm with dio-matrix and dout module possible?

MIDIbox BLM
1

Hi folks,

I saw the wiki of the 16x4 BLM board

16x4blm [MIDIbox]_pcb

and got my hands on one from a bulk order …

but I was wondering .. could I build my own BLM 16x4 by using standard dio and dout boards??

If I read the wiki well I need 2 DIN shift registres and 6 DOUT shift registers .. so I could use

one DIO Matrix board and a second DOUTx4 board too, right? ..

Seeing this pdf from the dio wiki page I’m unsure if not only one dio module is enough

http://www.ucapps.de/mbhp/mbhp_dio_matrix_8x16buttons_8x8leds.pdf

Do I really need the dual color leds?? Hmmm .. maybe if tracks have different lenght ..

My question is .. could someone show me how I should tconnect the buttons and led to the shift registers?? .. best in form of the nice pdf files tk provides us with.

Advantage for me would be that I can bring the buttons in line with the Seqv4 wilba design and also use the same switches …

Or would it be much easier to use the MBBLM via Lemur .. for Lemur now is available on Android too???

2

Did you want to build your own BLM PCB (either fabbed or on Veroboard)? 

 

If so, it’s more than possible but involves some work:

 

http://www.ucapps.de/mbhp/button_duoled_matrix.pdf

http://www.midibox.org/midibox_seq_blm_ext/

 

 

But if you have the PCB already, you have everything you need to make it work, the SRIO chain is onboard via SMDs.

1 Like
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Exactly that pdf i was looking for … 64 button + duo led .. ty

And yes .. I wanted to use dot matrix boards for the switches, leds and diodes .. wire them as matrix with verowire or copper wire like this

So if i use one dio matrix and one dout .. i have all the SR i need and only need to alter the blm part of the config file .. great