I've just moved to a student accommodation,and they are using sensors to keep the lights in the room on(I'm almost sure that they are PIR). The problem is that they turn off way too quickly and it's really annoying to move around just to keep the lights on.
Can I use IR LEDs and send a pulse every couple of minutes to trigger the sensor? If the answer is yes,should I use a 555 timer in astable mode to pulse an array of LEDs or is there a simpler way of doing this? (I also don't know how many IR LEDs should be used or what area they should cover to trigger the sensor if this method works)