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[Help]RFI on PIR sensor circuit

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Nicholas

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pir sensor circuit

My PIR sensor circuit is sensitive to RF field variation.
Please check attachement for the circuit.
At the moment when RF field got applied or removed or variated. TP13 output a trigger signal which is strong enough to trigger a detector.
Seems its the voltage variation when subject to RFI leads to the false trigger. How to get rid of this ??
Thanks a lottttttt.
**broken link removed**
 

pir sensor cÄ°rcuÄ°t

i am looking a device that mostly seen on the lifts door that open when a person entering in the lift

infrared is installed in a kiosk. when someone is infront of the infrared beam the software should detect the beam interruption, it should detect that someone is infront of the kiosk and raise an event...and i want to control this device from Visual Basic is this possible

waiting for the reply


thank u
 

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