Interesting idea -- I can see it would be relatively easy to calculate and 
compensate for the .  Wouldn't the IR diode unnecessarily wake the uC too 
often due to infrared noise?

Cheers,
-Neil.


On Monday 02 May 2005 03:48 pm, Wouter van Ooijen scribbled:
> > Anyone know where to find or how to figure out the startup
> > time for an IR
> > receiver module?   (I'm using the TSOP4838 in this case).
> >
> > The intention is to create a very low power IR receiver --  a
> > PIC would sleep
> > most of the time, but wake up periodically, switch on the IR
> > receiver, then
> > start checking to see if any signal is being received.
>
> I saw such a design some time ago, I think in elektuur. They used a
> 'conventional' IR diode to wake-up the uC who activates the
> modulated-IR-receiver.
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu


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