We will show you hot to extend the timing of the infra red motion led night light. The back of the device says 20 - 60 - and 90 second delay however when running a test the timing is 1/2 of each stated so we decided to extend the timing to about 85 seconds by using the chip resistors inside and placing them in series. You may extend it further by adding a resistor in series of 1 or all the timing resistors. First , remove the 3 screws from the back. [ photo 1 ] Then remove the 2 screws from the top [ photo 3 ] Find the chip resistors [ photo 3 ] and cut the traces labeled with a red line and add wire where the yellow line is. [ photo 5 ] This is for 1 setting only and all others will be disabled. If you wish you can experiment with different value resistors and place them in series with each chip resistor to add more time...for instance...add a 100k 200k and 300k , 1 to each of the chips for different delays of your choice...you can add a variable resistor to adjust the timing in place of a resistor - fine tune the time delay you wish and take out the variable resistor - measure the value - and place a fixed resistor of that value in place of the the variable one you used to fine tune the timing. Going further you can change the led's to infrared for hidden video cameras.....they will come on when someone enters the room but above 940nm infrared led's they won't see them but the camera will....
I tried a 100k in series with the 220k chip resistor and got a 60 second delay.
The next test was a 1meg in series with the 220k chip resistor and got about 3 min 45 sec.
2 comments:
Another easy way to add resistors is simply lifting the blue wire near the chip resistors and placing resistors in series , one side of the resister to the blue wire and the other side to where the blue wire was lifted. Works fast just insulate it so it does not short anything out. 1/8 watt resistors work great.
My light lost it's ability to turn on automatically, (stays on all the time)
I'm guessing that if the chip or the sensor are bad than I'm done, but what would you trouble shoot 1st to bring it to life?
Great Hack articles, Thanks
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