> -----Original Message-----
> From: Jason Dini [SMTP:jason.dini@ORCHID-SA.CO.ZA]
> Sent: Tuesday, April 29, 2003 11:03 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [EE]: PC mouse optical detectors.
>
> I've often wondered about this myself. If you say that the receiver has 3
> pins, it could just be that they have 2 photo-diodes in one receiver
> package
> and simply see which gets ir light first.
>
> Jason
>
Correct.  They are more likely to be a pair of photo transistors, but
whatever they are there is two of them.

Regards

Mike



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