"Bell the Hybrid" "Bob & Holly Wilson" <bwilson4use@m> wrote in message
news:1inax0e.qdad659428n4N%bwilson4use@m ...
>...
> In the meanwhile, I've had success with a spare NHW11 keyfob. I've
> mapped the transmit frequency, duration and figured out the data
> encoding. I've not tried to decrypt the packets, yet, but that is not
> really required. At a minimum, I can prototype a workable keyfob system
> and demonstrate it to Congress.
> Bob Wilson
>
I've used my handheld comms receiver (Icom IC-R20, if you're into that sort
of thing) for the same purpose, although I didn't get as far as you did
since, at the time, I didn't have a particular goal in mind--I was just
curious.
I assume your keyfob idea is for the car to detect the proximity of a keyfob
carried by an "at risk" pedestrian, then use the horn or something to
produce an audible signal. Is that correct? I think this is a workable
idea, but my main concern would be that of range. Isn't the range for the
SKS system fairly limited by design? Is the range sufficient to provide a
warning with reasonable reaction time? That aside, clearly an RF-based
approach holds a lot of promise. One could imagine incorporating
transmitters into canes, seeing-eye dog harnesses or leashes, etc., so it
doesn't increase the burden.
Seems like a cell phone would also be a great starting point--one that is
programmed to periodically output a specially encoded signal. The advantage
there is the potential for range and for including other types of features
(for instance, the phone could speak to the user, say, to give directional
or speed information) with little to no incremental cost. Most everybody
carries one already anyway. The down side in that case would be that the
hybrids would have to be appropriately equipped to receive and act upon the
special cell phone signal.
- Doug |