>It is an IR phototransistor not a photodiode, so I didn't think I would
>need amplification, just a pull up resistor.  But the output at the

It still needs to be amplified.

>it is exposed to IR.  I have it setup as a 10k resistor connected to +5V

It is being pretty highly saturated.  Try this:  Connect your scope probes
across a IR LED.  Watch what happens when you blast the diode with your
TV's IR.

>ground.  I've put the Vcollector on the oscilliscope, and have been able
>to see signals from a IR transmitter by triggering on a negative going
>edge.

But it takes a long time.  Try the diode and see what happens.

Andy

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Andy Kunz               Life is what we do to prepare for Eternity
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andy@rc-hydros.com      http://www.rc-hydros.com     - Race Boats
andy@montanadesign.com  http://www.montanadesign.com - Electronics
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