At 15:56 29/04/2003 +0200, QAC wrote:
>OK. I can understand that, and if they had 4 pins, I would
>have been even clearer. But with 3 pins (1 look as power and 1 as
>gnd), do they code/multiplex the two detectors in 1 signal on 1 pin ?

You don't apply "power" to a sensor. An IR sensor is just
a photodiode whose response will vary depending on how much
light it receives within the IR band of the spectrum.

G.

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