Maker Pro
Maker Pro

pir motion sensor

gurjant.sandhu33

Dec 10, 2013
51
Joined
Dec 10, 2013
Messages
51
once the pir motion sensor is triggered it takes a while to go back to its off state. is there any way to reduce that time.
my pir sensor module is HC-SR501
 

davenn

Moderator
Sep 5, 2009
14,043
Joined
Sep 5, 2009
Messages
14,043
not without some circuit modification
for that a circuit diagram of the unit would be needed
or at bare minimum, some really good photos of both sides of the circuit board so the circuit mite be traced and existing component values read

or .... have you considered contacting the manufacturer for any information ?

Dave
 

cjdelphi

Oct 26, 2011
1,166
Joined
Oct 26, 2011
Messages
1,166
Not really..... not without modification of the ir sensor/pcb
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
It's always worth reading the datasheet.

The resistor connected to pin 3 is what you need to look at. However both Tx and Ti may need t be altered. You may not need to alter the PCB, but you may well have to change the value of some components.

I haven't looked in great depth, but beware of the use of very low value resistors. If you need less than maybe 1k, reduce the capacitor value instead.
 
Top