Re: Wheelchair proximity detection

["David Norwood" <judapeno@xxxxxxx>]

Sorry, I did respond to your question but accidently sent it to your
non-existant e-mail address.  I drive my chair with a sip-n-puff.  I could
interface an ECU with some sort of remote control for the door, but it is
tiring and time consuming to access the ECU functionality.  That is why I'm
asking about proximity detection.

I am going to try a bluetooth device powered off the chair batteries.
Thanks to everyone who contributed ideas.

David

"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
news:44d22ecc.1405861296@xxxxxxxxxxxxxxxx
>I did a bit of googling and, as I expected, quickly found several available
> systems that address this need. Most require a switch on the chair but
> they
> have things like chin operated switches. Since you didn't respond to my
> ealier question about how you control the chair, I don't know whether a
> chin
> switch is appropriate but I think you'll probably have better results by
> communicating with companies who make automatic door openers for
> wheelchair
> access than you'll get here. Here's one link.
>
>     http://www.opensesamedoor.com/
>
> "David Norwood" <judapeno@xxxxxxx> wrote:
>
>>I need to trigger an automatic door opener when my wheelchair is within
>>about 3 feet.  I would like some sort of radio transmitter on the
>>wheelchair
>>and a receiver near the door.  Here are my requirements:
>>
>>- it must work at about 3 feet.  I can't find an affordable RFID reader
>>that
>>works at this range.
>>
>>- the transmitter must operate on a battery for at least two months
>>continuously.  I like Bluetooth, but can't find a low power transmitter.
>>What do they use on those automatic pet doors?
>>
>>- it must provide a simple contact closure, or have a serial or usb
>>interface and Linux drivers.  Zigbee?
>>
>>- I'm not too concerned about security.  There are easier ways to get into
>>my house than spoofing a radio signal.
>>
>>- it must not require too much soldering.  I have friends that can help
>>with
>>this, but within reason.
>>
>>I've seen various radio transmitter modules on the web, but don't know how
>>much power they require, and how to interface a receiver to my computer.
>>I've figured out how to do this with Bluetooth, but I have the power
>>issue.
>>
>>David
>>
>