gEDA-user: Another gEDA-based project working
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 Thanks to all the contributors to gEDA for helping to make this possible. Eric ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Another gEDA-based project working
On Fri, 2009-02-27 at 08:51 -0700, 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 Looks very nice. Congratulations! ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Another gEDA-based project working
On Feb 27, 2009, at 10:51 AM, 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 Thanks to all the contributors to gEDA for helping to make this possible. Wow, nice design, and a beautiful board! Congrats! -Dave -- Dave McGuire Port Charlotte, FL ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Another gEDA-based project working
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 Thanks to all the contributors to gEDA for helping to make this possible. Eric 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. Best regards, Jelle ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Another gEDA-based project working
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
Re: gEDA-user: Another gEDA-based project working
Eric - On Fri, Feb 27, 2009 at 11:32:40AM -0700, Eric Brombaugh wrote: 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. I bought a kit recently from TPpacks.com, that was pretty nicely set up. The kit is really a bare board (US$49) plus a BOM ready to submit to Mouser (US$60-ish) and a PDF of assembly instructions. The ttpacks.com website is too strange to let me give a direct link, but if you use their search button with BMS you'll go straight to their 4-24 - Cell Battery Management System. A lot more people are willing to buy and assemble parts, than deal with getting a PCB made from Gerbers. Of course, it's also a significant cost savings to get one large batch of PCBs made, rather than many small batches. - Larry ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
