On 8 Sep 2006 at 21:06, peter green wrote: > some time ago (a few weeks iirc, not sure exactly how long) i > mentioned that i would like to enter my picsquirt ( > http://www.p10link.net/plugwash/picsquirt/ ) into the piclist design > contest. > > i was in uni today sorting out other things (i can only work on the > PCB design on the departments computers and its the summer holidays > atm) and have tried to export a set of gerbers and a drill file. I > have posted them at > http://www.p10link.net/plugwash/picsquirt/picsquirt_gerbers.zip can > someone take a look at them and tell me if they seem suitable? Hi Peter, Just a few comments on how you might make the PCB look nicer more than anything else, hope you don't mind a little critiquing... - Add a top overlay (if cost permits). - Make all tracks straight or 45 degrees. - Avoid internal angles of less than 90 degrees, eg. look at track junction near top right corner on bottom layer. These places allow etchant to be trapped and you can get over-etching (and it looks bad). Even 90 deg corners look nicer when a small fillet of 45 deg is added. - Try to make tracks exit pads from the end of the pad, looks nicer - Pad sizes are well sized, but 0.010" tracks are a little on the fine side, looks like you could handle 0.012" or 0.015" no problems. Only too fine if anyone is going to make the boards at home. - Hole sizes: You have 9 different sizes where 3 or 4 should be sufficient. - In a few places you have tracks running past the end of the pad. - "Necking down" from one track size to another looks bad when done on a corner, try and do it on a straight section of track. - I also couldn't read the drill file but I didn't persist with it. Lot's of personal prefference in the above, so ignore where necessary! Nice project, good work. -- Brent Brown, Electronic Design Solutions 16 English Street, St Andrews, Hamilton 3200, New Zealand Ph: +64 7 849 0069 Fax: +64 7 849 0071 Cell: 027 433 4069 eMail: brent.brown@clear.net.nz -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist