I have two related questions:

#1) Where can one get these PIR detectors?

#2) Are these similar to the sensors used in the non-contact thermometers?
If not, what kind of sensors are usually used there?

Thanks,

Sean

At 10:11 PM 2/1/00 -0500, you wrote:
>This is the most recommended way to do it. I would suggest it too. The
>low pass filter is the most effective way to detect changes in the
>signal without worrying about calibration or presets. 
>
>The only issue is that the PIC should wait some time after power on to
>then consider the output of the TLC271 valid, in some way, you can see
>this delay (60 seconds) in several motion detectors, including the
>expensive ones.
>
>A resistor of 4M7 connecting both inputs of the TLC, with a 4.7µF from
>pin + to ground, will give you a delay of aprox 22 seconds to load,
>plenty for fast triggering at the - input.
>
>Wagner.
>

|
| Sean Breheny                   
| Amateur Radio Callsign: KA3YXM 
| Electrical Engineering Student  
\--------------=----------------
Save lives, please look at http://www.all.org
Personal page: http://www.people.cornell.edu/pages/shb7
mailto:shb7@cornell.edu ICQ #: 3329174