Let`s go for my first midibox DIY - BLM

MIDIbox BLM
21

Hello

For the LEDs i found on eBay this.

http://www.ebay.com/itm/100-3mm-Dual-Bi-Color-Red-Green-Bright-3-Pin-Led-RG3L-/170713749496?pt=LH_DefaultDomain_0&hash=item27bf5517f8

100x 3mm bi-colore 3 pin red/Green 8,99 USD.

Its this a Good offer?

22

Thx acul, yes it is but there is a problem for the integration of 3 legged 3mm led with the livid buttons. I create a post on “part quetions”. I think the solution is to use SMD led, i’m searching for reference !

Edit : The project is actually paused (i have to build the SEQV4 first and a Shruthi) it will restart ASAP

23

Thx acul, yes it is but there is a problem for the integration of 3 legged 3mm led with the livid buttons. I create a post on “part quetions”. I think the solution is to use SMD led, i’m searching for reference !

Edit : The project is actually paused (i have to build the SEQV4 first and a Shruthi) it will restart ASAP

just incase you did not see my other post in the button thread

here is how to create custom eagle part footprints.

24

If you need help with creating the eagle part for your library. I may be able to help.

If you draw it on a piece of paper scan and upload it so i can see. I could have a go for you. : )

I know your busy as you mentioned in the other thread, so take your time. I get email notifications with a new post.

: )

25

Hello harps, i didn’t draw anythings, but i searchefor another solution.

Actually there is 2 type of nice pads (maybe we also can build them !) the livid and the sparkfun.

Pros/cons for each :

Livid :

  • They are not expensive (you have to count the pad, the spacer)

  • They are a bit small than the sparkfun

  • The ring is fat so there is no place for a 3-legged led if we don’t modify them.

Sparkfun :

  • Actually the are using a 4-legged led inside in 3 or 5 mm, so there is no problem to use any led inside (the ring is thinest.

  • the spacer can be used as module so we can do a clean work. (no strange cut everywhere.

  • They are (really really really) expensive

You have to know that with the sparkfun the BLM will mesure something like 450x450 (lenghtxwidth) Which is really fat !

At my opinion, the work on the livid pad will be hard, but the price is quite better. A BLM will cost an arm. (i don’t konw how much, but just the front panel express faceplate will cost something like 400$ !!!)

i have to work on the livid eagle pad and do some PCB prototype. the better could be something like 4x4 PCB, so all could use them and create matrix as they want (like 4x8, 4x16, 8x16, 16x16, or why not 64x64 !!!)

26

hi

I just saw the livid pads. yes it seems surface mount leds would be needed.

shouldn’t be too hard in eagle to redesign the pcb to connect up the leds.

i do not know the terminology but there should be a download for the pcb

contact footprint for the pad. im sure i downloaded this a while ago.

import into eagle then draw traces on the bottom layer and via them up into the middle

on the button ( on the top layer)where you want the leds to be.

I was playing around with this a few weeks ago, drawing traces and managed to save a custom part so it can be done.

when i get around to buying a few pads spacers i shall give it a go,

I would then print a (home made) pcb and use an arduino to connect to max msp via serial.

if you get stuck on eagle give me a shout. there is a part 2 of the video above also.

peace.

27

A long time later… i am not able to find SMD led that can provide 2000mcd (that what the monome use, enough for exterior use) diffused led.

 

It is not dead from my side, it is in a little part in my head…