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post Jun 5 2006, 08:00 PM
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I've had the idea about rolling my own Linux powered PDA for some time, but I've been busy with another project of mine. So, I haven't posted about this idea, but recently Da_Blitz posted:

the iMX3 is a custom PDA idea as the 2700G chip is VERY hard to get. dont want to hijack this thread anymore so if you want more info then contact me direct or make another post

Definately looking for some more info on that!

Here's some interesting ideas to get the thread started:

GumStix ( www.gumstix.com www.gumstix.org ): Very small, proprietary, stackable modules. Very hobbyist friendly, but current models are still based around the Intel PXA255.

Colibri Module : PXA270 with most of the needed chips built in, and connections for most of the rest, in a formfactor of a DDR SODIMM. Moderately hobbyist friendly, with boards only 119Euros for the 520MHz version, but with a fixed handling fee for Hardware of 100 EUR and shipping of 45 EUR. You'll want to order more than one to be price effective with this supplier.

CM-X270 Computer-On-Module: I stubbled on to this site last night. No idea about this supplier's ablity to handle hobbyists, or even the cost of the module. However, you can configure a pretty impressive COM on that page. Up to PXA270 520Mhz, 128MB of RAM, Intel 2700G with 8MB of its own RAM, audio codec, and 512 MB of NAND flash!

Take a look at the Google Ads when you do a search for 'Arm development board', as quite a few Ads hit the mark for what we would want, if they could be had cheap, and single unit quanties (which most aren't sad.gif ).
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post Jun 17 2006, 06:13 AM
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Ok got it dropping the pcmcia and making it a backpack

for the board i was thinking mabey even 2 boards staoked ontop of eachother as this would then be about the higet of some of the connectors and gives us huge amounts of real estate this would allow the 2 SD cards above each other, also i hope you estimated full size usb ports as i hate adaptors, plus if you put it on the back it would be great for a docking station

the layout as i see it is CF on one of the shorter sides (left most likly), headphones on the other (headphone and microphone/headphone so 2 or 4 channel depending on settings) USB along the back (at least 1 usb mini socket, if there is room 2 full sized sockets), irda on the back (makes more sense there) and hdmi on the back (for the docking station), antenna will be female and an the back so it sits flush and you can use an adaptor, backpack connector ethier into the CF slot (CF and pcmcia are just diffrent sockets and current draw) or a connector next to the headphone jack

check out the cassiopia for form factor, i have one here and it has a full pcmcia slot and isnt that bad apart from bieng a bit big, i think we might end up with several diffrent form factors at the end of this for a couple of reasons, i would like to see cheap arm "blades" as well, ethernet, 8MB of ROM and 256MB of ram and nothing else so that i can have a native compiling cluster to work with and considering the price of the chips and how integrated they are it would be about half the size of a credit card and would be handy for inital dev work (a cheap platform to test drivers, for devs)

i would drop the rotating screen but am open to leave it in (i never use it or the touch screen) leaving it out simplifies alot of things mechanically and electrily

thats what i imagine anyway, mini sim is a must, wonder if we can use its security features somehow

good point abot the antenna, i agree tat that is a must and would be required if we use a metal case

we need a thick metal case in my opinion as i dent them fairly easily' if its metal i could also use it as a heat sink which is a plus (not sure how hot they get need to check power consumption)

i havent looked at power consumption yet but i would like to stay at around the 2Ah mark as it is a good size and fits nicly with the double boards

it would be intresting to take this design and make it into a long life laptop as well as it has the media capabilities, by keeping it flexible we could do this and these cpu's use 1/10th the power of a laptop (based off xscale power consumption)

i hope to have a website up soon for several resons so that should not be a problem

apm is a must hoever i think that dynamic power gating and freq scaling are very important as well
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Posts in this topic
Tom61   Build Your Own Linux Powered Pda   Jun 5 2006, 08:00 PM
koen   QUOTE(Tom61 @ Jun 6 2006, 04:00 AM)I've h...   Jun 5 2006, 10:36 PM
Da_Blitz   I have 30+ links to every manufacturer of xscale b...   Jun 6 2006, 07:09 PM
danboid   Hot DAMN! 2700G, 128MB+ RAM, VGA out and h...   Jun 15 2006, 07:45 AM
Ragnorok   - Thanks for the link, koen. Nice feature set on ...   Jun 15 2006, 08:10 AM
zmiq2   The most problematic I think it's getting a ke...   Jun 15 2006, 09:03 AM
danboid   I'd definately want separate mic and headphone...   Jun 15 2006, 11:31 AM
Tom61   Getting a decent resolution(640x480 or greater) go...   Jun 15 2006, 02:30 PM
Ragnorok   - As it happens I have both a Psion 5 & a 5mx,...   Jun 15 2006, 03:14 PM
Da_Blitz   Ok i like this i am not getting the usual "i ...   Jun 16 2006, 02:01 AM
Tom61   "Ok i like this i am not getting the usual ...   Jun 16 2006, 02:17 PM
Snappy   This is getting pretty exciting ... My needs are...   Jun 16 2006, 04:07 AM
Ferret-Simpson   Hmm. . If I remember my XDA's correctly, doesn...   Jun 16 2006, 03:03 PM
Ferret-Simpson   Sod. Forgot my most important thought: The power. ...   Jun 16 2006, 03:16 PM
stampsm   count me in. i have been looking for a project to ...   Jun 16 2006, 10:51 PM
Da_Blitz   Looks good! If you go the CF/PCMCIA route, it...   Jun 16 2006, 11:55 PM
Da_Blitz   WOW thats long   Jun 16 2006, 11:59 PM
stampsm   if i was designing a pda here would be my basic de...   Jun 17 2006, 12:46 AM
stampsm   well LOL i see someone was also typing a long repl...   Jun 17 2006, 12:50 AM
stampsm   i would like to add that i like the idea of the fr...   Jun 17 2006, 01:04 AM
Ferret-Simpson   And good choice on your Zaurus! POODLE LUV...   Jun 17 2006, 02:12 AM
Ferret-Simpson   Forgetting things AGAIN: Dan, Why the HELL do you...   Jun 17 2006, 03:47 AM
Da_Blitz   Yeah a camera would be nice but i would put it on ...   Jun 17 2006, 04:55 AM
Ferret-Simpson   Never used IRC. I think sticking to Forum is bette...   Jun 17 2006, 05:44 AM
Da_Blitz   Ok got it dropping the pcmcia and making it a back...   Jun 17 2006, 06:13 AM
Ferret-Simpson   I actually think the rotating screen is important,...   Jun 17 2006, 07:29 AM
stampsm   try adding the docking connector like i was saying...   Jun 17 2006, 07:37 AM
stampsm   on that blacksmith point actually yes. i got a 95...   Jun 17 2006, 07:42 AM
Ferret-Simpson   Fancing making cases for the PocketPenguins? And ...   Jun 17 2006, 08:15 AM
Da_Blitz   I think you miss the point on a flush connector, w...   Jun 17 2006, 06:12 PM
stampsm   there is a cool electronic site called sparkfun i ...   Jun 17 2006, 06:32 PM
stampsm   here is a sd card holder unit http://www.sparkfun....   Jun 17 2006, 06:54 PM
Da_Blitz   Thanks for those links, i was going to sugest drop...   Jun 17 2006, 11:02 PM
stampsm   i was looking at the size of that trackball and it...   Jun 17 2006, 11:21 PM
stampsm   in the next week or so i can try working up a pros...   Jun 17 2006, 11:24 PM
stampsm   also iteam #6 on that ittcannon page link would ma...   Jun 17 2006, 11:27 PM
stampsm   the trackball has green, blue, orange, and, red le...   Jun 17 2006, 11:31 PM
Da_Blitz   I like your ideas alot, seems we have a couple of ...   Jun 17 2006, 11:40 PM
Da_Blitz   That reminds me how about wirless usb, there is a ...   Jun 17 2006, 11:43 PM
stampsm   QUOTE(Da_Blitz @ Jun 17 2006, 11:40 PM)I like...   Jun 17 2006, 11:46 PM
stampsm   i love freescale products. i think it might be coo...   Jun 18 2006, 12:02 AM
Da_Blitz   QUOTEcount me in. i have been looking for a projec...   Jun 18 2006, 02:05 AM
Da_Blitz   seems you have the same idea as i have, the reason...   Jun 18 2006, 02:17 AM
Da_Blitz   Quick price list CPU $30 RAM (256MB) $8...   Jun 18 2006, 03:00 AM
stampsm   [QUOTE(Da_Blitz @ Jun 18 2006, 03:00 AM)Quick...   Jun 18 2006, 08:16 AM
stampsm   i can work on getting a keyboard design figured ou...   Jun 18 2006, 08:20 AM
Ferret-Simpson   Ok. . . The i300 chip is designed as a central c...   Jun 18 2006, 01:03 PM
stampsm   found a vga lcd screen http://www.gethightech.com...   Jun 18 2006, 01:03 PM
stampsm   i just did a scale drawing of the c3000 keyboard l...   Jun 18 2006, 01:11 PM
Ferret-Simpson   Hey, good thinking! I never thought to use a r...   Jun 18 2006, 01:15 PM
Ferret-Simpson   Basic layout of CXXXX works, I think. . .   Jun 18 2006, 01:16 PM
stampsm   it seems like lcd modules are really hard to find ...   Jun 18 2006, 03:10 PM
stampsm   ebay to the rescue it's only 320x240, but.......   Jun 18 2006, 03:14 PM
Tom61   Before deciding on a microtrackball, be sure to tr...   Jun 18 2006, 04:19 PM
stampsm   QUOTE(Tom61 @ Jun 18 2006, 04:19 PM)Before de...   Jun 18 2006, 04:41 PM
stampsm   i was looking at memory and if we go for 128MB fou...   Jun 18 2006, 04:43 PM
Tom61   How about this kind of setup for a motherboard; Ha...   Jun 18 2006, 06:34 PM
stampsm   well if you are looking at making money from the b...   Jun 18 2006, 07:42 PM
stampsm   well it turns out that the i.mx31 supports "m...   Jun 18 2006, 08:46 PM
Da_Blitz   iMX3 supports 256MB over 4 chips (64MB per chip se...   Jun 18 2006, 10:19 PM
Da_Blitz   can you guys post any links to suppliers you can f...   Jun 18 2006, 10:20 PM
stampsm   i found a 640x480 3.7" lcd LS037V7DW01 datas...   Jun 18 2006, 10:24 PM
stampsm   QUOTE(stampsm @ Jun 18 2006, 10:24 PM)i found...   Jun 19 2006, 12:57 AM
stampsm   all the costs i wrote i think i got from arrownac....   Jun 18 2006, 10:28 PM
stampsm   that lcd also has an option of 320x240 mode by sen...   Jun 18 2006, 10:32 PM
stampsm   did i say how much i like ebay yet? this auction j...   Jun 19 2006, 12:16 AM
Da_Blitz   Nice, what terms do you use when you search, as i ...   Jun 19 2006, 03:34 AM
Da_Blitz   btw there is a reply on the prev. page, i tend to ...   Jun 19 2006, 03:51 AM
Ferret-Simpson   The 4" CGS screen is exactly what we're l...   Jun 19 2006, 05:15 AM
danboid   Trackball in the middle of the cursor keys? Nooooo...   Jun 19 2006, 06:30 AM
Ferret-Simpson   Umm. . . the 5600 is squareish, the Clamshells are...   Jun 19 2006, 09:00 AM
stampsm   on that trackball idea keeping it seperate like th...   Jun 19 2006, 11:59 AM
iignotus   Do we have any semblance of a schematic yet? With ...   Jun 19 2006, 12:25 PM
stampsm   QUOTE(iignotus @ Jun 19 2006, 12:25 PM)Do we ...   Jun 19 2006, 01:03 PM
iignotus   QUOTE(stampsm @ Jun 19 2006, 01:03 PM)QUOTE(i...   Jun 19 2006, 04:09 PM
stampsm   QUOTE(iignotus @ Jun 19 2006, 04:09 PM)QUOTE(...   Jun 19 2006, 04:56 PM
stampsm   one thing we have not much discused is the wifi ch...   Jun 19 2006, 01:01 PM
speculatrix   do you mind if I add a few comments to your geek-f...   Jun 19 2006, 02:08 PM
dhns   QUOTE(speculatrix @ Jun 19 2006, 11:08 PM)3) ...   Jun 20 2006, 03:44 AM
speculatrix   QUOTE(dhns @ Jun 20 2006, 12:44 PM)IMHO, you ...   Jun 20 2006, 04:00 AM
dhns   QUOTE(speculatrix @ Jun 20 2006, 01:00 PM)The...   Jun 20 2006, 05:20 AM
stampsm   sure modular is good but it has a drawbac...   Jun 19 2006, 04:05 PM
speculatrix   modular is good but it has a drawback of size (bi...   Jun 20 2006, 02:07 AM
stampsm   i am having trouble getting these quote thingies t...   Jun 19 2006, 04:08 PM
danboid   Glad to see my separate trackball + cursor keys/d-...   Jun 19 2006, 06:05 PM
desertrat   QUOTE(danboid @ Jun 20 2006, 02:05 AM)CONCENT...   Jun 20 2006, 01:11 AM
Lance   How about a IR LED that are used by standard consu...   Jun 19 2006, 07:59 PM
Da_Blitz   Why do i bother sleeping this moves to fast (6 pag...   Jun 20 2006, 04:58 AM
Da_Blitz   actually i did mention a virbrater when talking ab...   Jun 20 2006, 07:15 AM
stampsm   well off to work in a few minutes will reply more ...   Jun 20 2006, 07:43 AM
Da_Blitz   I second that but looking thregh the 2521 page ref...   Jun 20 2006, 07:59 AM
Fushnchupsh   hey, if this becomes a reality I'll totally se...   Jun 20 2006, 08:45 AM
speculatrix   now, I know people want video out, but can I say f...   Jun 20 2006, 09:22 AM
stampsm   ok for a quick recap i may have missed something s...   Jun 20 2006, 10:17 AM
zmiq2   impressive, amazing, exciting. but really feasible...   Jun 20 2006, 10:34 AM
Ferret-Simpson   Ok ok ok. . 5.1 Audio? WHAT THE HELL IS THE POINT...   Jun 20 2006, 11:39 AM
Ferret-Simpson   Anyone think this could be made Sticky? They did ...   Jun 20 2006, 11:46 AM
Fushnchupsh   As far as video out goes, I have always had the dr...   Jun 20 2006, 12:30 PM
stampsm   for wifi chips i was looking at the zd1211 chip. i...   Jun 20 2006, 01:14 PM
stampsm   well it seems that the MC13783 chip is used on the...   Jun 20 2006, 03:13 PM
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