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PostPosted: Fri Dec 15, 2017 6:59 am 
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Location: Decherd, Tennessee
Program a hesitation in your pir sensor program where it double checks the pir high signal. I have found that this greatly reduces the false triggers yet misses very few true triggers. Something like this if you are running picaxe chips:

If PIRInput = 1 Then
Pause 50
If PIRInput = 0 Then
Goto Main
EndIf


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PostPosted: Sun Dec 17, 2017 3:55 pm 
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A clutch of microwave boards landed on my front porch today.

These: https://www.amazon.com/CHENBO-RCWL-0516 ... B06XCPCKFB

Gonna' rig one up and see how it performs.

I use almost exclusively PIR in box wired to Oppilas wireless remote. They work pretty darn well. On those units a timer is incorporated to turn PIR off from 9am to 7pm in hot weather, but the microwave boards might be a decent solution to the hot-weather PIR false trigger problems I encounter down here.

I'll post the progress/results.

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PostPosted: Mon Dec 18, 2017 7:48 am 
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WOW! At that price, they are even cheaper than a PIR circuit too. Interested to see your results!

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PostPosted: Sat Dec 23, 2017 9:13 am 
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FIREMANJIM wrote:
Program a hesitation in your pir sensor program where it double checks the pir high signal. I have found that this greatly reduces the false triggers yet misses very few true triggers. Something like this if you are running picaxe chips:

If PIRInput = 1 Then
Pause 50
If PIRInput = 0 Then
Goto Main
EndIf
Hey fireman .. thanks for the suggestion .. lemme try similar code with arduino :)


www.anjanikumar.net


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PostPosted: Sat Dec 23, 2017 9:23 am 
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Gartooth wrote:
A clutch of microwave boards landed on my front porch today.

These: https://www.amazon.com/CHENBO-RCWL-0516 ... B06XCPCKFB

Gonna' rig one up and see how it performs.

I use almost exclusively PIR in box wired to Oppilas wireless remote. They work pretty darn well. On those units a timer is incorporated to turn PIR off from 9am to 7pm in hot weather, but the microwave boards might be a decent solution to the hot-weather PIR false trigger problems I encounter down here.

I'll post the progress/results.
Hey Gartooth .. I picked up the same ones .. they seems to respond very well , I have a feeling the response is faster than PIR. I am trying to figure out reducing field of view , I've read that that waves don't pass through metal , so I've built a small aluminium box with opening on one side to restrict FOV, but it is detecting movement on out side the FOV . Will try with other metals ..let's see how it goes ..

Please post your experience once you build the unit

www.anjanikumar.net


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PostPosted: Sat Dec 23, 2017 9:50 am 
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My experience is identical. Astonishingly sensitive to motion moving toward or away from sensor, slightly less sensitive to lateral movement. Unlike a PIR, requires no recovery period. About a 2-second “on” per trigger and re-triggers as long as movement detected.

May need to put resistors or pot inline to reduce sensitivity/range and get metal shield to work. Though the signal is reduced, mine shoots through metal containers. Tried bean can, cast aluminum box, and stainless cup.

I am reading 2.5mA current draw.

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