i have designed an IMU (inertial measurement unit) on expressPCB and am about to order one, and thought some of you might want one (and by want one, i mean split the total cost up evenly with me) i got the link for this particular model from the E-Unicycle, but i am prototyping the 6DOF board, and you can make any other one with it (for 4DOF, don't use the z-Axis board, for 2DOF just use the z-Axiz board as a *-Axis). they posted a .pdf of the board right on the page, so i guess it's ok with them if you make one for yourself, and since the 4DOF (the one i need) board is $320 i wouldn't buy one anyway. i emailed them asking if it was ok if i did this, and they didn't say no (it really was just a formality, i would've built one anyway ) i don't want you to tell me your interested if you would've bought one from them, because i'm selling their product for less than they are selling it. but i don't think it's wrong to do this if you wouldn't've bought from them anyway, it's not like they are losing money or anything. they also published a .pdf and publicly posted it on their page using a program i use (expressPCB, screw eagle and it's complicated design), really a "left the front door open and the TV was missing when i came home" situation, even though it would really be a "i left the front door open and i came home and all my books were read" situation (i'm just using their information). it looks like there is one E-8 surface mount accererometer for each axis, but everything else is through hole mount (1/4W resistors, radial leaded capacitors, and DIP IC's). looks easy once you get the parts and get those damn SMD parts on. right now the price stands at about $100 USD for two boards, but i'm probably going to want some extra boards for myself, so i will be fair and credit myself with a few more "shares" of the price (if i get five boards and five others buy a single board, i'll pay half the total cost). the boards are 2.5" X 3.8" (6.35 X 9.65 cm) so i can probably just mail it in a standard envelope, so add 50 cents if you want for postage (in the US, deffo add for shipping to the UK). i have gotten two of the three sections done, if anyone is interested in a 6DOF or 2DOF let me know so i'll hurry-the-hell-up getting the last part done. if you want me to email you the file as an attachment email me and i will, it'll make me feel secure knowing there is two people trouble shooting the board for mistakes (haven't found any yet, but i don't want to screw everything up for everyone) instead of just me.
Why not laser printer fabricate it? I'll bet you could even find someone on the forum who would do that for you for less than $50 a board...maybe not. My laser printer is coming in sometime soon, maybe I'll give it a shot. Always wanted an IMU board...
it's a double sided board, and i think it would be difficult to get all the vias, holes, and traces to line up perfectly. there is probably close to 200 on the controller board alone. i'll email you the expressPCB file of it if you want, and if you make one, why not make two? email me first because the forum email thing doesn't let me attach files, i'll reply with the file and a url of the .pdf document on the website
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screw you dude, i got my hopes up and now it was really nothing! Dammit Cpemma! i wanted to know all about philly roffers, and now i can't!!! j/k
sorry for double post so quickly, but my edit isn't working right now, but are you interested in going halves on it Iamnafets?
so far, the only way i can save a PCBexpress file is in .pcb, is there a converter or some other way to save in a compatible filetype? or do i have to figure out EAGLE and redo it? i hate EAGLE, it's so frickin' complicated and the autodraw thing for turning schematics into board layouts sucks. the only thing i like about EAGLE is it's "optimize" button for wires, i can make uber complicated wire routes and it does them the simple way.
Try http://www.pad2pad.com -- they give price breaks the more you order: eg I waqs testing it out, and it was $140 for one board, or $160 for 20 duplicates! Not as good as $25 for one PCB though. I think their software can import from gerber files.... PCB express should export to that. ch424
