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Microwave motion detectors.


 

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Anyone done anything with these?

I got a bunch and I’m also finding them overly sensitive or generating false positives.

John D.


 

I have one, it would be interesting to see how one is used.

Ralph

On Wed, May 8, 2024 at 1:06?AM John Dammeyer via <johnd=[email protected]> wrote:

Anyone done anything with these?

I got a bunch and I’m also finding them overly sensitive or generating false positives.

John D.


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Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer


 

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Hi Ralph,

Back in 2009 when this was built

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I designed into the lamp an expansion header and added software to monitor one input.? We were worried about vandalism so the idea was to add a PIR sensor to several of the lower lamps and if motion was detected send a CAN message over the bus to the host PC which in turn would generate an alarm via Internet which would in turn call the police.

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Turns out it wasn’t needed as a number of other security measures were put in place.? When I bought a bunch of the lights as surplus

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I thought I’d add that PIR sensor and use these as path lights that at night would ripple on and off based on sensed motion.? Or play colorful shows on special holidays.? Like all green on St. Patrick’s Day or Red on Valentine’s day but still ripple ON to White when motion was detected.

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Like my stair lights.?

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The holders for the lights would look something like this:

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Or as a bollard light in this case lit up with Halloween pumpkin orange and a parabolic reflector I designed to cast a 4’ diameter circle.

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But at night what’s also visible is the PIR sensor when it detects motion and it’s outside the lamp in a #D printed holder.

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I like the idea of a microwave sensor because it can be inside out of the weather and not look like there’s a motion detector.? And yes, the red LED can be disconnected but during the day the white bubble is still visible.

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Anyway, this is an ongoing project and all the lamps need a special modification to overcome a bug in the TI LED driver chip.

John D.

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From: [email protected] [mailto:[email protected]] On Behalf Of Ralph Hulslander
Sent: May 8, 2024 7:59 AM
To: [email protected]
Subject: Re: [digitalhobbyist] Microwave motion detectors.

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I have one, it would be interesting to see how one is used.

?

Ralph

?

On Wed, May 8, 2024 at 1:06?AM John Dammeyer via <johnd=[email protected]> wrote:

Anyone done anything with these?

I got a bunch and I’m also finding them overly sensitive or generating false positives.

John D.


--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer