Re: [LAD] Wireless Electricity vs audio quality

On Monday 25 August 2008 18:59:07 Bob Sanders wrote:
> Dan Mills, mused, then expounded:
> > Wireless power transmission by low frequency resonant coupling **IS** a
> > useful trick in some circumstances (I have seen it used to charge hand
> > lamps for use in explosive atmospheres for example (Well over ten years
> > back)), and in intels case could be used to for example power a wireless
> > mouse or charge a phone, but you can bet there would be a handshake
> > between the device and the charging pad prior to RF being applied.
>
> About 10 yrs ago, I worked for a company that made a transponder that
> mounted on the bottom of a locomotive and communicated with an RFID
> r/w tag that was mounted on the sleeper between the rails.
>
> The transponder had a low freq - 125 KHz, loop that sent power to the
> tag, which woke up and converted the power to DC, approx. 15mw to power
> the tag. Data communications took place at 2.4GHz. I forget if they
> went to England or France, but they may still be in use today.

These RFID techniques are still very much in use today.

sincerely,
Marije
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev@email-addr-hidden
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
Received on Thu Aug 28 20:15:02 2008