infra red door monitor project- problem with receiver

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gfactor

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door monitor

I have this infra red door monitor project and i don't know if anybody have any modification n hand. I was not able to see the right reciever with 3 pins. I was able to see the ones with 2 pins. I f anybody can help me out
 

Door Monitor

Search for TSOP17xx

The last xx denotes the modulation frequency

Nandhu
 

Door Monitor

how do i connect the ones with 2 pins

Added after 0 seconds:

how do i connect the ones with 2 pins
 

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