Forums

need advice on device design

Started by emanuel_ovidiu June 7, 2010
 For my bachelor project i need a device capable of collecting data from
sensors and transmit it through a 802.11b transceiver to a pc. I've worked
until now only with software high and low-end programming but never with
hardware ; I've started reading and looking through tons of stuff but I
failed at finding a small factor , max 5cm x 5cm board with an mcu , power
regulator (as the device has to work with batteries and be as mobile as
possible). A solutions as MotionBee would have been perfect but i need the
rf transceiver to work with 802.11b standard so that it would communicate
with normal wireless routers not only with 802.15.4 ones . A SoC would be
perfect and if it had an LCD controller even better but thats optional; the
3 sensors when in use are having a response time of 0.002 ms , and after
resolving this issues i would like to port a part of the computation to the
device so the mcu should be around 40/80 mhz with as much ram as possible .
Maybe someone with more expertise could help , guide me in the right
direction .

	   
					
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Posted through http://www.EmbeddedRelated.com
On 06/07/2010 06:11 AM, emanuel_ovidiu wrote:
> For my bachelor project i need a device capable of collecting data from > sensors and transmit it through a 802.11b transceiver to a pc. I've worked > until now only with software high and low-end programming but never with > hardware ; I've started reading and looking through tons of stuff but I > failed at finding a small factor , max 5cm x 5cm board with an mcu , power > regulator (as the device has to work with batteries and be as mobile as > possible). A solutions as MotionBee would have been perfect but i need the > rf transceiver to work with 802.11b standard so that it would communicate > with normal wireless routers not only with 802.15.4 ones . A SoC would be > perfect and if it had an LCD controller even better but thats optional; the > 3 sensors when in use are having a response time of 0.002 ms , and after > resolving this issues i would like to port a part of the computation to the > device so the mcu should be around 40/80 mhz with as much ram as possible . > Maybe someone with more expertise could help , guide me in the right > direction . >
See if you can find a wireless Ethernet module that will talk serial on-board and 802.11b to the outside world. Then you should be able to do the rest of it with a simple processor such as a PIC or one of the new itty bitty Cortex ARM parts that are popping up in low-pin-count packages these days. How easy it'll be to integrate will depend heavily on the Ethernet module, of course, and whether that 5cm x 5cm requirement is do-or-die, or if it's just a preference. (This would be simple with a PC-104 stack, IHMO). -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
Microchip Inc.
>See if you can find a wireless Ethernet module that will talk serial >on-board and 802.11b to the outside world. Then you should be able to >do the rest of it with a simple processor such as a PIC or one of the >new itty bitty Cortex ARM parts that are popping up in low-pin-count >packages these days. > >How easy it'll be to integrate will depend heavily on the Ethernet >module, of course, and whether that 5cm x 5cm requirement is do-or-die, >or if it's just a preference. (This would be simple with a PC-104 >stack, IHMO). > >-- >Tim Wescott >Control system and signal processing consulting >www.wescottdesign.com >
Thats just what i needed , searching for "wireless Ethernet module" gave me the right result :D http://www.rfm.com/products/spec_sheet.php?record=WSN802GC (1 square inch) and its perfect for the first stage testing. I've looked at a few small form factor computers similar to the pc-104 , as beagleboard pico-itx and mobile-itx but in all cases they're just an extreme overkill. Thank you ! --------------------------------------- Posted through http://www.EmbeddedRelated.com
>Microchip Inc. >
they do have great stuff , but to kip it simple I was hoping to find a small board with as many parts ,that I need, as possible ; if not for the WSN802GC transceiver with integrated SoC I would've went with a pc32 mcu and a MRF24WB0MA transceiver both from microchip. thank you anyway --------------------------------------- Posted through http://www.EmbeddedRelated.com