I've got this cheap LED light bulb with a built-in PIR sensor. It works great except that it's only on for about 20 seconds before it turns off. I would like to extend this to about three minutes. Unfortunately it doesn't have a potentiometer but I was hoping I could change a capacitor or resistor to lengthen the time. I have a couple of pictures of the PIR circuit. The circuit which converts the mains AC to DC is a separate PCB which is deeper in the darkest recesses of the bulb.
The chip is a BISS0001 and according to the datasheet there is a resistor and a capacitor connected to pin 3 which I can use to adjust the on-time. I used my multimeter to find the resistor (R2!) and its value is 100 K. Will it be likely to work if I change it to 1 M? The datasheet doesn't specify any kind of limits but I assume there will be an upper limit where the current is reduced too much for the chip to function normally? I have a selection of SMD resistors so my preference is to change that and not the capacitor.
The chip is a BISS0001 and according to the datasheet there is a resistor and a capacitor connected to pin 3 which I can use to adjust the on-time. I used my multimeter to find the resistor (R2!) and its value is 100 K. Will it be likely to work if I change it to 1 M? The datasheet doesn't specify any kind of limits but I assume there will be an upper limit where the current is reduced too much for the chip to function normally? I have a selection of SMD resistors so my preference is to change that and not the capacitor.
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