can i modify hc-sr501 PIR sensor to work only at night ?

Thread Starter

Layan_AK

Joined Mar 28, 2017
78
hi,

i see that i can add ldr to Hc-sr501 pir sensor so it will work only at night,the output become high for a certain period if any motion detected .
can i modify it so the output become always high at night(even no motion detected) and goes low during the day ?

L
 

Thread Starter

Layan_AK

Joined Mar 28, 2017
78
i short the c6 and test the circuit, the output always high (dark or not )
i need the output to be high at night (without any motion ) and off during the day.

L
 
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