http://tech.groups.yahoo.com/group/Homebrew_PCBs/ Homebrew Printed Circuit Boards Sun, 05 Jul 2009 01:54:41 GMT Adam Seychell http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23136 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23136 I've uploaded and new version of gerb2tiff. Stefan, I got around to adding the feature to render multiple Gerber files to single bitmap. See file ChangeLog. Fri, 03 Jul 2009 22:41:27 GMT Simao Cardoso http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23135 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23135 ... There are some power modules that use smd transistors soldered on very thin fr4 boards which are glued to thick aluminium plate. It works at the same time Fri, 03 Jul 2009 20:29:49 GMT Troy http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23134 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23134 Looks like the copper sheets could be used for inkjet as well. I wonder what else the sheets could be attached to (fr4 can't be the only option...)? Fri, 03 Jul 2009 14:59:48 GMT Simao Cardoso http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23133 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23133 Did you calculated the time needed by a 2 axis machine to print with a single beam??? I think isolation milling can beat that! See my post few minutes ago Fri, 03 Jul 2009 14:40:42 GMT Simao Cardoso http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23132 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23132 You are reinventing the 70's gerber photo plotters! See http://www.artwork.com/gerber/appl2.htm. Todays photo plotters use an lcd like a projector and raster Fri, 03 Jul 2009 14:03:22 GMT gsi11135 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23131 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23131 Why not focus the projection and move either the projector or PCB while only exposing portions of the PCB at any one time. Essentially maskless lithography. Fri, 03 Jul 2009 13:46:46 GMT javaguy11111 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23130 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23130 What power laser are you using? Fri, 03 Jul 2009 05:00:53 GMT Cristian http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23129 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23129 ... I'm working on that, with red (only to see it) laser. Quite good results for the beginning. It melts the ordinary (cheapest) tonner. I have to solve: how Fri, 03 Jul 2009 04:58:14 GMT Simao Cardoso http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23128 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23128 uspo 4545850 and 4632727 instead. My mistake. Fri, 03 Jul 2009 04:51:44 GMT Simao Cardoso http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23127 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23127 ... Funny! Yes is a crazy thing. But is PATENTED for pure tin metallic resists! Like i said is like the peroxide-sulfuric etchant, and from a searchable post Fri, 03 Jul 2009 04:41:58 GMT ngh2k3 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23126 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23126 Hi, Has anyone tried using a low power lasers from cd/dvd or blue ray burner drives? I expect the accuracy could be quite good. A blue ray laser should be Fri, 03 Jul 2009 00:00:50 GMT Adam Seychell http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23125 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23125 ... A nice effort on finding a suitable etchant for metallic etch resist. I tried persulfate but that attacked tin enough to make it unreliable. From your Thu, 02 Jul 2009 19:12:04 GMT DJ Delorie http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23124 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23124 ... The last board I did was a lowly 5x2" and was 14,400 "pixels" across. I think 1080i is nowhere near enough resolution for PCB exposure. Thu, 02 Jul 2009 11:10:30 GMT Adam Seychell http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23123 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23123 ... Hi Stefan , its nice to know someone out there has a use for it. Yes, its GPL and no restriction to use it commercially, provided the program is Thu, 02 Jul 2009 04:53:17 GMT Steve http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23122 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/23122 The pico projectors I've seen are low res, less than NTSC TV. And 1080i isn't even as high a resolution as my 19" monitor. It has been said before here that