Multisensor PIR based on IKEA Molgan
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@Yveaux said:
@Sander-Stolk said:
door sensor and connect it at the ceiling
???
My house has its doors in the walls...Well... connect a very small white wire in the hallway to the top of the door with a magnet.
With white ceilings you can put little cables like out of sight -
@Sander-Stolk ah, OK. I think you can even run it all on batteries if you want
@Yveaux Yes it can BUT...
I have 0 succesfull attempts with a APM with removed regulator on 2 AA batteries. For some reason it draws power and within 3 days my batteries are dead. It's something that I will ask on the forum in a while but for now this works all the time so for it is the easy way :) -
I put a more complete write up of my mod from the previous post on my blog including the link to the sketch.
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@tomkxy Nice write up of the "conversion". One remark to save some time... instead of removing R12 to R16 you can just remove R17 ... same result less effort.
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@tomkxy Nice write up! Do you have an idea on the accuracy of the humidity sensor within the case?
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@tomkxy Nice write up! Do you have an idea on the accuracy of the humidity sensor within the case?
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@tomkxy did you really need the voltage divider? I think the sensebender does a decent job of measuring battery percentage by default.
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@tomkxy Nice write up! Do you have an idea on the accuracy of the humidity sensor within the case?
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I just realized that I see a lot of false triggers. Anybody else having that experience? Any idea how sensitivity of the PIR can be reduced?
@tomkxy You can change the sensitivity of the PIR. You have to change the value or R15. See here for a datasheet of the BISS001
But I do not know whether you should increase or decrease it...?
If you did not modify your PIR then the PIR will stay high for 30 SEC. What is the period between the false triggers?
Could it have to do with powering your sensebender from the powersource within the PIR and not directly from the battery? -
@tomkxy You can change the sensitivity of the PIR. You have to change the value or R15. See here for a datasheet of the BISS001
But I do not know whether you should increase or decrease it...?
If you did not modify your PIR then the PIR will stay high for 30 SEC. What is the period between the false triggers?
Could it have to do with powering your sensebender from the powersource within the PIR and not directly from the battery?@dynamite I see no clear pattern for the false triggers. Most of the time it is after about 7 minutes. But not strictly. Sometimes more than a half hour.. Well if I would power the sense bender directly from the battery I either would have to use a regulator or remove one of the batteries. Would the PIR still work reliable with about 2.4V? Would it make sense to try a capacitor between the 3V where I power the sense bender from to ground?
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@dynamite I see no clear pattern for the false triggers. Most of the time it is after about 7 minutes. But not strictly. Sometimes more than a half hour.. Well if I would power the sense bender directly from the battery I either would have to use a regulator or remove one of the batteries. Would the PIR still work reliable with about 2.4V? Would it make sense to try a capacitor between the 3V where I power the sense bender from to ground?
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@dynamite I see no clear pattern for the false triggers. Most of the time it is after about 7 minutes. But not strictly. Sometimes more than a half hour.. Well if I would power the sense bender directly from the battery I either would have to use a regulator or remove one of the batteries. Would the PIR still work reliable with about 2.4V? Would it make sense to try a capacitor between the 3V where I power the sense bender from to ground?
@tomkxy you can just use 3 batteries to power the pir and only 2 to power the atmega and radio. Just c
Use the same ground on them, and tap the arduino power after the second battery.
I have some pirs running this way and they work just fine!http://yveaux.blogspot.nl
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@tomkxy you can just use 3 batteries to power the pir and only 2 to power the atmega and radio. Just c
Use the same ground on them, and tap the arduino power after the second battery.
I have some pirs running this way and they work just fine! -
@Yveaux @dynamite Thanks for your suggestion. I followed @Yveaux suggestion and tapped the power for the sensebender after the second battery. It is now working for 2 hours without any false triggers. I will continue the test (for test purposes the sensor is sitting in a room with usually has no movement).
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@Yveaux @dynamite Thanks for your suggestion. I followed @Yveaux suggestion and tapped the power for the sensebender after the second battery. It is now working for 2 hours without any false triggers. I will continue the test (for test purposes the sensor is sitting in a room with usually has no movement).
. I used a Sensebender which is perfect for that use case having already a ATSHA204 and temp/humid sensor on board.
