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RE: Motorola 33794 electric field imaging IC
Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Marco.Denicolai-at-tellabs-dot-com>
It seems to me (after a quick reading) that the device measures its own
generated E-field distortions and, from that, infers object
distance/position. I guess it performs some rudimenal vector algebric
What would be more interesting, IMHO, would be to find a good
application note about this device or the technical principle of
measurement described somewhere.
We could then develop our own, ruggeded and properly shaped "whatever"
to picture the E-field around a TC.
> -----Original Message-----
> From: tesla-at-pupman-dot-com [mailto:tesla-at-pupman-dot-com]
> Sent: 11. maaliskuuta 2003 03:24
> To: tesla-at-pupman-dot-com
> Subject: Motorola 33794 electric field imaging IC
> Original poster: "Jim Lux by way of Terry Fritz
> <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>
> Anybody fooled with the MC33794.. it's a thing used to image electric
> fields, typically for air bag controllers, etc.
> It "generates a high purity sinewave, steers it to one of 9 external
> electrodes and measures the resutlant field coupled into the
> The evm (KIT33794DHEVM) works at 125 kHz (of all frequencies to
> choose!) $138 from future-active-dot-com
> Here's the data sheet for the part:
> The part is $3 in Qty:1000+
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