v3.4 hardware update

A minor update, implementing some more of @davedarko's suggestions.

Changes:

Added footprints for smaller (6x6mm) tact switches
Added footprints for WS2812B's and diodes to the bottom layer and top layer, respectively. This allows the the board to be used with either side up.
Some rerouting, especially the of WS2812B supply traces

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Update 2015-10-29:

I couldn't help it... and made a version for the Pro Micro, v3.4 a.

I just swapped the Pro Trinket footprint for the Pro Micro one and did some rerouting.

Unfortunately I had to rotate and mirror the footprint such that the uUSB connector points towards the mode and reset buttons which might be problematic but it's nothing a good hacker couldn't fix ;)

Update 2015-12-11:

There are a few problems/errors with v3.4a so I'd recommend not to make/order this board anymore and instead use v4 or higher [... so you can test it and tell me about the errors ;)]. However, since there are a few boards of this version out there, here are some notes:

Despite the orientation markings being in the design (as seen above) they apparently didn't make it onto the board... hopefully the orange markings in these images clarify that:

One of the errors on this board was that the bottom two rows of buttons were not connected to the Pro Micro footprint. This can be fixed by bridging the signals across the ATmega328 footprint(s) like this:

Since this is just a test bed for me I didn't solder all the LEDs (or buttons and encoders; they should make good enough contact as is) and initially I soldered it in the wrong spot... it's clearly an advantage if one can read the silkscreen...

Discussions

Craig Hissett wrote 10/30/2015 at 10:16

Hi Buddy

Just about to order some of these :)

Could you let me know what size/how many layers it needs/thickness etc? I'm clueless - first time buyer!

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Stefan Lochbrunner wrote 10/30/2015 at 10:36

It's two layers (top and bottom, no internal layers). Thickness of the board doesn't matter really matter, 1.2/1.6mm should be fine. I think 1oz copper is the default at most places.

Where are you ordering these? I'm pretty happy with dirtypcbs.com and wanted to try their new front end at dev.dangerousprototypes.com/store/pcbs mainly because you can get 10+ boards at 10cm*10cm for 12$.

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Craig Hissett wrote 10/30/2015 at 10:47

Thanks matey.

I am looking at dangerous prototypes too - going to order a set of the ten 10x10 boards.

I'm so happy, nervous and excited all at once - it could be my medication kicking in ha ha

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Craig Hissett wrote 10/30/2015 at 10:55

Getting an error measuring my gerbers. Bugger!

I've just ordered them through the dirtypcb site. I can't bloody wait to get them! :-)

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Stefan Lochbrunner wrote 10/30/2015 at 10:59

I was just about to address those. What about uploading just the .brd file?

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Stefan Lochbrunner wrote 10/30/2015 at 11:09

I just uploaded a zip with gerbers https://github.com/stefan-lochbrunner/Pro-Trinket-USB-Keyboard/blob/master/schematics/v3.4a.zip. Besides the silkscreen text at the bottom they look fine at first glance and the dimensions seem correct as well.

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Stefan Lochbrunner wrote 10/30/2015 at 11:23

Had to update the gerbers because I missed the .txt the first time. Silkscreen still not perfect but dimensions look right.

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Craig Hissett wrote 10/30/2015 at 11:28

Thanks mate. dirtypcb.com took it no problem; dangerousprototypes wasn't a fan :)

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Stefan Lochbrunner wrote 10/30/2015 at 11:41

The site's still in development so some problems are to be expected I guess.

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Craig Hissett wrote 10/29/2015 at 23:10

What a guy! Thanks for the pro micro version!!

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Stefan Lochbrunner wrote 10/29/2015 at 23:52

You're welcome :)

So I guess if you order these boards our previous deal is off, right?

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Craig Hissett wrote 10/29/2015 at 23:53

If you drop me your address I will happily still send you a Pro Micro to play with matey!

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davedarko wrote 10/20/2015 at 20:58

Awesome! I think this will be cool for streaming stuff over webcams with https://obsproject.com/ as well. Looking forward for my big buttons and rotary encoders to arrive!

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Stefan Lochbrunner wrote 10/21/2015 at 10:13

I'm looking forward to seeing your build :)

Have you ever thought about 3D printing caps for the buttons or knobs for the encoders?

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davedarko wrote 10/21/2015 at 10:41

HA! Guess what I'm designing right now :D I found these [http://www.thingiverse.com/thing:493729] and am editing them a bit bigger and thinking about ordering them at shapeways.

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Stefan Lochbrunner wrote 10/21/2015 at 12:02

What would be the price per piece if you order them? Wouldn't printing them yourself be easier?

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davedarko wrote 10/21/2015 at 12:25

I paid 5,78E for 9 pieces in purple plus 6,90E shipping. I don't have purple abs and I wanted to check the purple from shapeways out, and since the buttons are nifty and I wanted them to look reaaaally clean, I thought "why not" :)

65ct or 141ct with shipping.

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v4 sketch makes use of multimedia keys

Pro Trinket and Pro Micro Compatibility

Discussions

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