davedarkoYesterday I was chasing duo/bicolor LEDs on ebay.com because I read about blue/red ones on Reactron Integron for Automobile from Kenji Larsen. It never occurred to me that they weren't only red/green ones anymore. Inspired by this I made a 3x5 (15) LED matrix board with charlieplexed pinout in the hope I will be able to make a sometimes purple/red/blue display or colored temperature thingy. This will give me some coding experience since I have to come up with some array magic. I still haven't found out how I can tent the vias in eagle so OSHpark will add the solder stop mask over. The next iteration will probably have 1206 resistors on there and after that I'm going to order the 11*10 matrix I have already designed. This big matrix is perfect for a word clock project but I would need to check my software before. I'm also interested in a clock design as supposed to be seen here: http://hackaday.io/project/1480-Charlieplexed-LED-Clock this would need 9*8 (72) pins (60 for minutes and 12 for the hours) and a good positioning/addressing system.
Awesome links
https://dl.dropboxusercontent.com/u/4345112/www/mrule/charlymuxing/charliemux.html
http://tomscircuits.blogspot.de/2010/10/charlie-cube.html
[UPDATE] Final results
I had to solder two jumper wires to make the connections to fix the somewhat buggy display, but now it's all worked out :) I bought red-blue and red-green BI/Duo LEDs.
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When you change the Limit to a value bigger than the drillsize of your vias the stop mask will not be applied.
Best regards, Gruß Stefan
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I not exactly get it ... i thougt my answer were matching anyhow ;-)
At your image the vias have no stop mask applied. Therefore you could solder to them (they are not painted purple).
We agree the purple is the NOT stop mask (what is left after applying the stopmask?
Do you see the stop mask in eagle?
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ich mach's mal auf deutsch und übersetze es danach, wenn wir uns verstanden haben :D ich hätte gerne, dass die Vias lila sind, damit ich die nicht aus Versehen mit einer LED zusammen löte. Für mich ist Lötstopmaske gleichbedeutend mit "hier kannste nich loeten weil lack drauf ist" und der Wert der eingetragen ist, ist bei mir 0. Jetzt bekomm ich nen Fehler "Stopmask" wenn ich den DRC laufen lasse und meckert dass ich den Siebdruck auf einem Loetfeld habe.
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Ich fand es auch schon etwas verwirrend, dass das tStop heisst, eigentlich wär tSolder oder sowas einleuchtender...
Da wo tStop bzw. bStop ist, kann gelötet werden, falls eine Kupferschicht drunter ist. Also müsstest du bei Limit einen Wert größer als den Bohrdurchmesser deiner Vias wählen, damit die Lötstoppmaske nicht erzeugt wird.
Die Fehler erscheinen erst wenn man die Lötstopmasken anzeigt, die meisten muss man nicht so ernst nehmen.
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*thumb up*
btw: Sorry for the deleted new comments ;)
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