Author Topic: Hardware (Read 69156 times)

stampsm · « **Reply #75 on:** October 19, 2006, 07:55:47 pm »

this looks like a promising bluetooth chip

BR-C46AR

http://www.blueradios.com/orderinfo.htm

it has a serial interface and is a surface mount chip. you can get single quantities from sparkfun for about 50 USD

http://www.sparkfun.com/commerce/product_i...products_id=149

plus they say "All BlueRadios modules support: SDP, SPP, DUN, LAP, FTP, GAP, RFCOMM, L2CAP, Headset, and Audio Gateway." so this bluetooth module should be able to handle almost any bluetooth protocal we can need.

stampsm · « **Reply #76 on:** October 20, 2006, 02:06:27 am »

here is the manual for the commands to control the bluetooth module i posted about above.

http://people.clarkson.edu/~meyer/BlueRadios_AT_Commands.pdf

Da_Blitz · « **Reply #77 on:** October 21, 2006, 04:14:47 am »

as far as i know, linux already has support for this type of bluetooth module (basically all devices have to conform to the same comm spec over ethier serial, usb or dma (DMA in the true sense of the word and not the ancy "data copier" that PC users associate it with)

anyway, i think i can do better than $50 a chip, in fact i think i can do 10 times better than that

i actually fonund another project or two that i need a board like this for so i now have more of an incentive, turns out that companies buy servos for $2 and sell them for $20 to $80 and i now know a supplier, so bring on my new linux powered robotic army

stampsm · « **Reply #78 on:** October 21, 2006, 04:53:27 am »

Quote

anyway, i think i can do better than $50 a chip, in fact i think i can do 10 times better than that
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what cn you do better with? plz tell

Da_Blitz · « **Reply #79 on:** October 22, 2006, 06:19:57 am »

i ment get the chipset instead of the module and buy it from someone who deals in bulk (ie digikey or simmilar)

spark is good but they are aimed at making a profit off the hobbiest which means inflatted prices

stampsm · « **Reply #80 on:** October 22, 2006, 08:46:53 pm »

the good thing is sparkfun is good for the hobbiest/prototyping, since they will sell in single quantities. they are actually cheaper to buy from in lower quantities since the manufacture sells that chipfor 100 usd for single quantities. if you buy in bulk though you would go to the manufacture and get the chips for about 15-19 USD each. if would be cheaper to get the raw chips and put your own together, but i can't seem to find much info on how you would go about it. if we had to write our own firmware or have to pay extra fees to use one that someone else wrote that would be even more work to do. what we need is someone with experience is stuff like this to help us figure it out. next time i go to my college class i might have to see if they have any books on the low end aspects of bluetooth in the library. they do got some like this on GSM i might have to pick up anyway.

Da_Blitz · « **Reply #81 on:** October 23, 2006, 02:32:10 pm »

problem is that the PCB maker will be purchasing for us and can eseily get in bulk.

for example i have seen servos sell for up to $80 but as i know someone who runs a buisness selling those parts i can pick them up for thier cost price ($2)

basically its the power of numbers and scince you will all be getting them from the one manufacturere who buys chips like this already we get a nice little saving

remeber fully made boards are the way to go

speculatrix · « **Reply #82 on:** October 30, 2006, 09:16:01 am »

absolutely tiny wifi module from socket:
http://www.clieuk.co.uk/forum/showthread.php?threadid=8361

Da_Blitz · « **Reply #83 on:** October 31, 2006, 04:19:07 am »

thanks for that, definattly worth looking into.

drivers wont be a problem as they say the have a dev package and they are also what i waould call a trusted company (ie likly to sell to us and actually have a reputation which is more than most companies i have reviewed for chipsets)

speculatrix · « **Reply #84 on:** October 31, 2006, 06:35:58 am »

yet another GPS chip, this time a combo with the new European Union's Galileo system: http://www.u-blox.com/technology/u-blox5/index.html

stampsm · « **Reply #85 on:** November 04, 2006, 02:23:44 am »

i am trying to get ahold of an i.mx21 devkit hopefully it stays i my price range. the i.mx21 is close enough to the i.mx31 that you can start developing software for it until we get working i.mx31 boards.

Da_Blitz · « **Reply #86 on:** November 04, 2006, 07:09:59 am »

i dont really see what there is to develop, its mainly a config problem IMHO, sure the bootloader may be a bit annoying at first but all it needs to de is loada lin kernel after it has setup the ram or we swap it out for uboot which makes my life even easier

Tomoe · « **Reply #87 on:** November 22, 2006, 02:21:56 pm »

I don't know if this has been mentioned, quick search doesn't show up anything on oesf.org, but anwyays, here it is:

http://www.parallax.com/detail.asp?product_id=28146

Simple and relatively small GPS module, just so you know.

speculatrix · « **Reply #88 on:** November 23, 2006, 05:08:11 am »

Quote

I don't know if this has been mentioned, quick search doesn't show up anything on oesf.org, but anwyays, here it is:

http://www.parallax.com/detail.asp?product_id=28146

Simple and relatively small GPS module, just so you know.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=146983\"][{POST_SNAPBACK}][/a][/div]

look at the price - over US$70 even in larger quantities!

Ragnorok · « **Reply #89 on:** November 24, 2006, 12:15:49 am »

- WOWZERS. Fall off the earth for six months to find a house, buy it, move, and get set up enough to read OESF again, and look what happens! Went from glimmer of an idea to the PocketPenguin forum. Sheesh!
- Been reading for hours now ... first the 29-page monster thread from OESF, and now I've just started at the top of the hardware thread and began gnawing through the whole thing. Simply amazing, what's been typed and replied, it is.
- I'm very glad RFID got axed. Bad, bad tech, that, and about as secure as a seive holds water. I'm intensely interested in this project, but I'd avoid it like anthrax if it had RFID in it.
- I like the idea of trying to license maps from someone, and TomTom seems the most likely candidate, despite all. (shrug) Doesn't mean it has to be done ... just tossing out my half-nybble, as it were. Even if GPS doesn't have an immediate spiffy application, I think it's still an usable feature, if it's not too much hassle to include it.
- I was bemoaning the loss of the external CF whilst reading the monster 29-page thread, but I think in the long run it's probably not a bad idea to nix it. As mentioned, most things I'd want CF for are built-in, so I'm sure I wouldn't really miss it. One may always make a case for this or that CF peripheral, but the SD-Raid sounds too cool to pass up. I'd take four SD slots for that! (dr00l)
- Now that I have some small bit of time between unpacking, repairing, and installing, I'll try to have a little more reliable presence here.
- Wowzers!...

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Author Topic: Hardware (Read 69156 times)