midgetfidget
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Posts posted by midgetfidget
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http://www.sparkfun.com/commerce/product_info.php?products_id=734
The above link was posted somewhere here a while ago.
I'm planning a 16x16 led matrix and i've read about the current limit of the standard DOUT shift registers.
This chip can supply 150ma constant per channel. So if can play around and get leds that draw a little under 10ma it should be fine to run 16 x 16 I guess?
I'm looking for opinions on whether this would be the best way to do this?
Would this chip be a direct replacement for the standard chip?
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I'm building a midibox 64e that has an 8x8 matrix of leds (built by me, not a bought one) and I was wondering how to wire it. I looked at the wiring diagram for the Midibox Sid's matrix. Would it work if i essentially copied that, but expanded it for 8x8?
Would it be easy to implement in the firmware?
a last question, in a matrix are all leds able to light seperately?
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it'd be great to have rgb leds that could change colour according to wht the encoder is assigned to. EG red for res, green for cutoff etc etc.
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I have a half built midibox that i'll be finishing when exams are over.
Anyone know a good place in melb that'll cut aluminium front panels at a reasonable price?
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I had an mmt8 that had that problem, I used a pencil eraser to rub the gunk off, and them wiped it with alcohol. It worked fine.
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http://www.sparkfun.com/commerce/product_info.php?products_id=755
These could be usefull on a midibox, I wonder if they put out the standard mouse signal?
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Certainly looks more professional than monodeck 1 ;D (no offence)
or my half-built hunk of junk.
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Calling someone autistic is fucked though.
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my 2cents:
use an encoder for scene select as well as the two buttons.
As for price, it depends on how good you are at being stingy.
I've got all the parts I need for my midibox64e (minus knobs) for around $200USD
which has a 64 backlit button matrix (like monome) 40 pots, 10 encoders, 4 joysticks and 25 extra buttons.
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I'm in Melbourne too, I live right near swop shop. It's awesome.
My controller is designed for ableton/reaktor I'm about 1/2 way through building it. It has 4 joysticks, 33 pots, 8 encoders and about 80 backlit buttons (64 of them in a monome type setup) It's cost me about $250 for all the parts, Only thing I have to buy now is knobs and a piece of aluminum plate for the face.
When it's finished I'll post some pics on here.
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Lucky I found this thread, I was planning on just wiring my leds up any way, and correcting it in the software.
So when using backlit buttons, according to the wiring diagrams the din number for the button must match the dout number for the led?
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A quick question.
I'm currently designing my ableton controller, and I noticed you have <<Q and Q>> buttons, are these for scrolling through the scenes?
Can you scroll each channel independantly, or does it select a whole horizontal scene?
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Fair enough.
I'm making my own ableton controller/monome clone. I'm building it to fit into a suitcase (one of those strong aluminium ones) You can get those suitcases really cheap (30-40usd) and a plate of aluminium for the faceplate. Sorta like this http://www.midibox.org/forum/index.php?topic=5955.0 but bigger
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Why don't you just build all your controllers into a flightcase or something? You could even rig it up to have one power supply then it would all be in one box.
High current shift registers for led matrix
in Parts Questions
Posted
Thanks for your input, i'm still really novice at this electronics thing.
The transistor array thing you're talking about would that be along the lines of suckow/monolake rgb circuit? (http://www.suckow.de/ralf/ledmatrix4x20/index.html)
I'm thinking maybe use more DOUTS and break up the matrix into smaller sections like 4 times 8x8. The leds have to be reasonably bright to go through the silicon pads.