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Author Topic: Another 8x8 RGB matrix board  (Read 3021 times)
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"The old Europe"
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Hi,

so Halley beat me, but only because my PCBs were rotting in a dark customs office. I wasn't notified it had arrived by our local mail.

Anyhow, IT'S ALIVE. It should be fully code compatible with Halley's shield - or vice versa :-)


Here are some pictures:




Some more are here


The oddest thing was, that the ATmega168 couldn't be flashed without a quartz. According to the datasheet it should have been set to run with the internal oscillator ?


Edit:

I happen to have 5 PCBs and SMD parts for 4 more boards left. Just in case someone wants to play with it too :-)
« Last Edit: April 01, 2009, 12:01:51 am by madworm » Logged

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Wow, nice job!  That's pretty impressive-looking.  

YGPM...
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Connecticut, US
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I like the madworm matrix smileys printed on it!  What company did you use to make the board?  I like your embedded-ATmel solution and the buttons on the back is a slick idea.
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That looks fantastic.  I like the integrated MCU too.
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"The old Europe"
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@halley:

I used Seeedstudio's propaganda service. With all the delays I got from "competent" delivery companies it wasn't really fast, but from order to end of production it took about two weeks which is really OK for the price. At the time I ordered they officially only offered green solder mask, but I just said I'd like white and it worked just fine.

The white laminated solder mask is also _really_ tough. I didn't try to destroy it with my iron, but given the size of my tip I couldn't avoid touching it numerous times. No harm done whatsoever :-)


@Oracle:

Yes the mcu was essential to me. This one will go into a wooden enclosure eventually, so there's really no space for an arduino. I'll have to grind off a few mils to make it fit already.

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My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

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madworm, yeah, I'm going to be offering my board through Propaganda too.  I think there's room for two, especially since yours has the ATmega integrated and mine is a little more general-purpose.  If I'd thought to ask, I'd have asked for black or blue soldermask.  Oh well.  smiley

I ordered some SMT crystals and caps and resistors, but haven't yet bit the bullet to buy some ATmegas.  If you don't mind me asking, have you calculated what your Bill of Materials is costing per board?

I was amazed at how resilient the soldermask from BatchPCB was... I actually melted a whole resistor array in half on the second board I built, but not even the slightest scorch mark on the solder mask.
« Last Edit: April 01, 2009, 08:36:45 am by halley » Logged

"The old Europe"
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How much did it cost me, hmmm. It sums up to about 20€ for the parts.

I payed 9€ for the LED matrix, 4€ for the atmega and the next biggest thing were the headers.
The resistors, the caps and the led don't really matter that much.
« Last Edit: April 01, 2009, 08:53:18 am by madworm » Logged

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My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

Grenoble/Lyon - France
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I LOVE IT!!
please pm me with the infos on how to get hold of one of your leftovers boards (insert demoniac laughter here)
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"The old Europe"
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Thanks. 1 board is left :-)

Edit: all gone.
« Last Edit: April 02, 2009, 11:29:42 am by madworm » Logged

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My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

"The old Europe"
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Hi,

I've just ordered a batch of 25 boards. They will come with black solder mask and white silkscreen on both sides and are fully RoHS compliant. They basically look like the ones shown in the Wiki with inverted colors. There is a short writeup on the SeeedStudio Wiki and of course in my blog.

The controller board has additional connectors for PORTC and PORTD on its back side:

"PORTC:"


As you can see the RX/TX lines, the I²C lines and power lines are on them, so connecting to other boards or devices is easily done.
The controller works with the RGB LED matrix sold by ledsee.com or seeedstudio.

So in case you don't want to wait for SeeedStudio's upcoming Rainbowduino, I'll be having some PCBs to give away for just production cost. Unless I get bitten by the DHL/customs curse of infinite inexplicable delay again that is.
« Last Edit: April 06, 2009, 09:57:13 pm by madworm » Logged

• Upload doesn't work? Do a loop-back test.
• There's absolutely NO excuse for not having an ISP!
• Your AVR needs a brain surgery? Use the online FUSE calculator.
My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

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madworm -
VERY interested in getting a hold of one of these drivers once they are delivered. How can I get on the "customer list" once the boards arrive?

Regards,
Joe
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"The old Europe"
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Hi,

for people interested in getting a board please use this link:

request board
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My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

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Any chance you'll have a bundle with the board and 5 SMT chips?
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"The matrix V3 board with the blue LED and no LED matrix attached is the master" It's a simple arduino?
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"The old Europe"
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Hrm...

Let's say you could use a simple Arduino for the I²C master. I just happened to use two of these matrix boards. And one had no LED matrix attached.

Edit:

And yes, the boards are 'just a simple arduino clone' with some parts to drive the LED matrix. More like a simple clone, that is no USB converter chip and no auto reset. I was thinking about putting the FTDI chip on there, but that would have added cost and increased it's size.
« Last Edit: April 09, 2009, 08:05:12 pm by madworm » Logged

• Upload doesn't work? Do a loop-back test.
• There's absolutely NO excuse for not having an ISP!
• Your AVR needs a brain surgery? Use the online FUSE calculator.
My projects: RGB LED matrix, RGB LED ring, various ATtiny gadgets...
• Microsoft is not the answer. It is the question, and the answer is NO!

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