The easiest solution is probably just to use a wireless USB extender, such as those from http://www.icron.com/products/usb/usb_products.php or http://www.macnn.com/articles/06/01/07/wireless.usb.extender/ or http://www.robgalbraith.com/bins/content_page.asp?cid=7-7890-8153 Do a search for USB wireless extender to find others. http://www.digi.com has several USB products that can work together to provide your solution, but they appear to be outside your $250 price range. Worth mentioning though since they have all the various parts in a plug-n-play form. Could be useful for a quick prototype, and you can always negotiate the price down if you're buying more than 1. You might be able to get that kind of throughput from the many 802.11 microcontroller solutions available from companies like http://www.ubicom.com or http://www.rabbit.com . If you compress the data before sending it you'll increase latency, but you might reduce the need for a full 10Mbit/s data connection. Alternately, if you really mean a clear "clear-line-of-sight" then you could also use one of the many free space optical ethernet extenders. There are lots of projects on the internet for this. You might also want to look into the ethernet over power modules that are still available in the nooks and crannies of the internet. These look like wall warts with an ethernet plug. Perhaps your site would work well with one. Make sure you check the throughput - early ones went to 1.5 or 3mbits/s. Newer modules went to 11 or 22mbits/s if I remember correctly. If it's an art exhibit, put a tape drive on each end and run the tape from one spot to the other in a continuous loop. Bonus points if you use video tape and VCRs. Extra bonus points if you have it built so robustly that it never gets jammed and is handled by the mechanism well enough that it doesn't break. High latency though... :-) -Adam On 7/19/06, Robert Young wrote: > I have several designs for a client where I use the FTDI Chips FT245 USB > chip to handle the communication between the system and the PC. In some > the FT245 talks to a PIC (usually 18F6250) but in one case it connects > to a CPLD which is running a state-machine and ADC to get more sampling > speed throughput than the PIC could manage. One system can sustain > about 6Mbit/second transfers. I'm being a bit vague about the guts of > the design since there is an NDA in place. But once the PC initiates > the sampling process, it runs (controlled by the PIC or CPLD) until the > PC sends a "stop" command some undetermined time later. Meanwhile data > streams to the PC. > > My question is (and I'm just starting to look around) what devices are > available to provide a wireless connection, 8-bit wide FIFO like FT245, > at rates near 10MBit/sec over a distance (clear-line-of-sight) of at > least 50ft, 100ft preferred. Power is not an issue, while it is to be > portable, portable in this case means something smaller than a notebook > that can rest on a small cart. Cost is an issue, I'm hoping for less > than $250 in singles for any kind of OEM module. > > Of all the "replace your serial cable with wireless" products, most just > aren't fast enough at maximum speeds of 115kbps to 192kbps. > > Redesigning to use wireless Ethernet is possible but would probably > require removing the PIC18F and substituting something a bit bigger, ARM > perhaps, to have a decent throughput. > > Last thing, I'd rather have a pre-certified solution (US and EU sales). > > Rob > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist