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PIR question.
I am hoping to use a cheap PIR to monitor outdoor activity at night, but
the one I have appears to be too sensitive, it doesnt have the usual adjustments so may try and block some of the lense range. Anyhow I opened it up and there is a sensor and then an LED `bulb` which comes on when activated. Is the LED light necessary for it to operate as I would prefer it didnt light up if someone is snooping around my back garden at night. It is a wirless battery operated cheapo whereby the sensor is in the garden and the receiver is wireless in the house. |
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