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Re: [Amforth-devel] Atmega<any> support
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From: <an...@ki...> - 2010-08-23 11:40:36
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I guess it would be possible. I am not aware of a currently available "Drop in" solution though. For hostile environments I would be more inclined to take an off the shelf or DIY board that already existed and put it into a Potting box (or Mould) with connectors on the ends. Then fill the potting box with a clear resin or epoxy. (Maybe fibre glassing resin) so I could still see the LED's. Put fixed links on the board instead of plug on jumpers. If you DIY your own PCB you don't need to put pins in the connector holes. You can leave these out and wire the board direct to the connectors of your choice using short lengths of wire. Given that DB25's have only 25 pins though if using a 644 or 1284 you will have to choose which IO you want on them. Using a smaller device like the 328 you would put them all on. Once potted your board becomes impervious to moisture, vibration etc etc. But impossible to modify, repair or get at. So test it thoroughly first. All in all how much effort you go to will be governed by your need or application. For a class room environment something along these lines may be more appropriate as it provides some degree of electrical protection as well.. http://www.ruggedcircuits.com/html/mb324p.html Cheers Andy Kirby On 22/08/10 23:02, Kalus Michael wrote: > Hi Andy. > > I see. > Do you think there could be an 'drop in' solution for an 1284 in a > jumper box? > http://parts.digikey.com/1/parts/290826-jumper-box-db25-male-db25- > female-ab973-r.html > Will it fit into the holes of the borad that is in there already? > > In such a box it would be a nice 'of the shelf' micro for rough > environment. Femal side has the ports, male connects to terminal and > programmer. > > Michael > > > Am 22.08.2010 um 22:27 schrieb an...@ki...: > >> Michael >> >> I have yet to document and put up the board design I am using as it >> is a >> work in progress. >> >> The techniques I use to make PCB's at home I have already >> documented here:- >> >> http://aka47.adsl24.co.uk/serendipity/index.php?/pages/sspcb.html >> >> This is where I will also document the minimalist microcontroler board >> design I am using. It is a single sided PCB easy to make at home. >> >> Most design work is sort of iterative in that I do a design and >> then try >> out making it to discover where I did something wrong. Followed by >> modifying the design and then trying it again until I am happy with >> the >> end result. >> >> The design itself is OK I am just iterating on the PCB layout to >> get to >> something that is easy for other folk to work with. It is nearly >> there. >> I am just making some of the pads a little larger to make it easier >> for >> learner solderers. Then I can Document it and put all the files on >> line. >> >> The need to enlarge the pads was something I found when building up a >> pair of 644p boards to take the 1284p devices. These will be set up at >> the full device clock of 20Mhz. >> >> The version of the PCB when I put the details up should be 1.2 >> (1.0, 1.1 >> are the previous iterations). >> >> For etching I use the Copper Chloride method documented here :- >> >> http://www.instructables.com/id/Stop-using-Ferric-Chloride- >> etchant!--A-better-etc/ >> >> Sorry I am not big on video. >> >> But hope these help >> >> >> Cheers >> >> Andy Kirby >> >> >> >> >> On 22/08/10 18:51, Kalus Michael wrote: >>> Hi Andy. >>> >>> I'd realy like to take a look over your sholder when you do "built a >>> couple of boards up" - video? How do you do it? >>> Michael >>> >>> >>> Am 22.08.2010 um 19:02 schrieb an...@ki...: >>> >>>> Thanks mathias >>>> >>>> I have just received a couple of 1284's and built a couple of >>>> boards up >>>> with them so should be able to try it out over the next week. >>>> >>>> Cheers >>>> >>>> Andy Kirby >>> >>> >>> --------------------------------------------------------------------- >>> --------- >>> This SF.net email is sponsored by >>> >>> Make an app they can't live without >>> Enter the BlackBerry Developer Challenge >>> http://p.sf.net/sfu/RIM-dev2dev >>> _______________________________________________ >>> Amforth-devel mailing list >>> Amf...@li... >>> https://lists.sourceforge.net/lists/listinfo/amforth-devel >>> >> >> ---------------------------------------------------------------------- >> -------- >> This SF.net email is sponsored by >> >> Make an app they can't live without >> Enter the BlackBerry Developer Challenge >> http://p.sf.net/sfu/RIM-dev2dev >> _______________________________________________ >> Amforth-devel mailing list >> Amf...@li... >> https://lists.sourceforge.net/lists/listinfo/amforth-devel > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by > > Make an app they can't live without > Enter the BlackBerry Developer Challenge > http://p.sf.net/sfu/RIM-dev2dev > _______________________________________________ > Amforth-devel mailing list > Amf...@li... > https://lists.sourceforge.net/lists/listinfo/amforth-devel > |
