![]() Sceadwian: 1) my daughter suggested moving a few books and cutting a hole in the back of the shelf - now that's KISS, but I'm an electronics guy, not a hole saw guy.Ģ) Regarding reasons: my "extra" bookcase is unauthorized and I don't want to lose it my making waves - I'm chair of the Environmental Committee and disabling the auto shutoff and risking the light being left on by housekeeping is politically unacceptable :>) 3) I'll try the IR LED route, I didn't really consider the wavelength of the LEDs I was testing with. Thanks everyone for your comments, nudges and humor. ![]() So, provide some more information and I'd gladly help with it's design and construction. If that works then you have part of the solution, you just need a few IR LED's and low power timer with a switch, blink the LED's briefly every 5-10-15 minutes (whatever keeps the lights from going off) If you chose the proper timer you could probably use a smaller battery pack that would last months, if wall power is available the typical wasted current of a wallwart will likely be higher than the circuit itself. With the window of the IR remote pointed directly at the sensor window wait till the lights go out and without triggering it with your hand push a button with the remote, the pulsing from a close up IR remote will definitely set if off IF it's sensitive to that range. Try using a remote control, from ANY type of device. Why low power? Night light bulbs aren't exactly power hogs. What I mean by that is you would use a simple timer circuit to turn the nightlight bulb on over 1 second every 5 minutes, that should easily keep the light from every going off. Why don't you just blink a single night light bulb once every few seconds? There should be no reason to use two, the single pulsing should be recognized as moving. IR leds MIGHT be close enough but it depends on the sensors actually response. THAT being said =)ĭid you use IR leds or regular LEDs? Because regular LEDS won't come even close to IR. ![]() This hack isn't just ugly it goes against basic engineering, keep it stupid simple =) That being said the appropriate action is to have the sensor removed or bypassed by whomever takes care of the building where you work, it would be a good show of your persistence to find the right person to talk to get what you want done rather than rig a circuit for this. I have been able to "fool" the sensor with two 120V night light bulbs mounted about 6" apart and a manual switch to toggle back and forth between the bulbs to similate a moving IR source, but it's very cludgy and cumbersome and uses a lot of energy by itself.ĭoes anyone have any good ideas for fooling this sensor? Maybe a low power compact circuit or some other trick? Mirrors don't seem to reflect enough IR to get around the bookshelf. The sensor is not triggered by LEDs or a small flashlight waving near by. ![]() There is no manual over-ride on the control unless you take off the cover and set a DIP switch which I don't want to do for several reasons. Neither the shelf or the control is likely to be moved. I have a motion sensing lighting control in my office which unfortunately is behind a bookshelf and so I have to get up every 20-30 minutes and trip it to turn my lights back on. I am in need of a circuit to "fool" a motion sensing lighting control.
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