Jelle de Jong wrote: > Eric Brombaugh wrote: >> I've just finished assembling a new board that I did with gschem / PCB. >> Web page with description, photos & design info here: >> >> http://members.cox.net/ebrombaugh1/synth/armfpga/index.html > > Great work! Keep up the good work. > > Would it be possible to order it as demo kit for gEDA demonstrations that > I like to start doing.
Thanks. It's been a fun little project and I haven't even tried out the real applications yet. A few of the things I've learned about on the way: * Hot plate reflow (for the USB connector, micro SD socket and dual LDO with heat-slug). I'm using one of those circular cast-iron ones similar to what DJ has on his website. Works pretty well. * Contaminated solder paste - the first bit that came out of the syringe-full I bought wouldn't stick to _anything_. I had to squirt a fair amount out before getting to the sticky stuff. My best guess is that it must have been the silicone lube that they put in generic syringes. * Dangers of violating minimum line width. :) * Reliability of low-cost fabs. I found a short from USB +5 to ground on one of my boards. A clear failure in the fab since it's not in the gerbers or on the other board I got. * USB interfacing - fairly simple if you use someone else's code on a popular processor. * SD memory interfacing - see above. * I2C interfacing. Watch those clock speeds. I'm sure there are a bunch of other things that will rise up to meet me as I continue with it... As far as kits go, sorry. I'm not set up to sell parts (there are probably about $70 worth on this board if bought in small qty). If you'd like to take the gerbers to your own fab though feel free to do so. It cost me about $80 for two boards shipped from BatchPCB. Eric _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user