Suitable power supply for pir's?

randytsuch

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Would help if we knew more about what you were trying to power.
The PS in the link might be overkill.
 

Hound Dog 911

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4 to 5 pir's around the house that will be going to my sealevel device.
 

randytsuch

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Those need 9.6 to 16VDC, at 24 mA per device. Not much current required.

You can use a little 12VDC walwart for each one, that's what I would do.

Randy
 

Hound Dog 911

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I was thinking the same thing as I walked past Walmart. May check and see what they have. Would prefer to run at least 2 off of one power supply. That gets me going. It covers the 2 most important areas and gives my SD 59 ptz camera more coverage.
 

tangent

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I was thinking the same thing as I walked past Walmart. May check and see what they have. Would prefer to run at least 2 off of one power supply. That gets me going. It covers the 2 most important areas and gives my SD 59 ptz camera more coverage.
P.S. randy said wallWART not wallMART.

You don't need much current, find an old 12V 1A or even less (but try not to exceed 1A ) wall wart for something that's broken or you don't have anymore and buy a jack that fits it with screw terminals or chop the plug off split the wires and connect it up with a terminal block or wire nuts.

If you bought that 24VAC to 12VDC supply earlier you could still use that, depends on how you want to run the wires.

On outdoor PIRs, the DSC LC-171 has a larger coverage area and there are some low budget options that might work too.
 

Hound Dog 911

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I understood what he said. Walmart is about the only thing we have in our small town to get anything from. Was hoping to find something suitable. That converter is going up in the camera to power the mic. The LC-171 is pricey. Wow. I think 3 of the 151's could cover 3 sides of the most concerning sides.
 

randytsuch

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Radio shack used to carry little converters. The problem with RS is they sell cheap stuff that may not last long.

Amazon has tons of them, but you would likely need to cut the end of, and need a meter to get the polarity right (make sure positive goes to positive). You really have to get the polarity right or the magic smoke will leave your PIR.
 

Hound Dog 911

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I ordered 2 more of those 24vac to 12vdc converters and 2 more LC-151's. According to the site they cover same distance.
 

tangent

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I understood what he said. Walmart is about the only thing we have in our small town to get anything from. Was hoping to find something suitable. That converter is going up in the camera to power the mic. The LC-171 is pricey. Wow. I think 3 of the 151's could cover 3 sides of the most concerning sides.
Yea the 171 is expensive, there are a number of other brands too. The 171 is dual PIR + microwave meaning 2 PIR sensors have to trip to trigger it in addition to the microwave sensor and a wider field of view. Optex maxes some really expensive ones designed for ptz cameras that are irrelevant to a residential application.

There are some other options like this: WaterProof Outdoor Digital Motion Dual PIR Detector & Pet Immunity IP45 EA | eBay
But I can't vouch for it, not certain but it might have too much pet immunity for your needs (some have a setting to turn pet immunity on/off or include multiple lenses). This detector only has an IP54 rating iirc.

As for power you could buy something like this:
inShareplus DC 12 Volt Power Supply 0.5A(500mA) 6W, Wall Mounted AC/DC 12V Adapter, 100-240V AC to 12 Volt DC Transformer for LED Strip with 5.5/2.1 DC Female Connector to Screw Adapter - - Amazon.com

There's no real benefit to over-sizing the power supply. In fact it makes it easier to damage things.
 

tangent

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I ordered 2 more of those 24vac to 12vdc converters and 2 more LC-151's. According to the site they cover same distance.
The power adapter I just linked is probably a better choice, I'd cancel the extra 24vac to 12vdc supplies.

Run 4 conductor wire to the motions and you can power them all of the same supply.
 

Hound Dog 911

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I already ordered the other devices so just need a suitable 24vac adapter similar to that.
 

Hound Dog 911

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I will keep what I ordered and get the device you recommended.
 

Hound Dog 911

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Rep from the company says to run them at 13.6 and that when you get down to 12v things get sluggish. He definitely recommends the pyramid device.
 

tangent

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Rep from the company says to run them at 13.6 and that when you get down to 12v things get sluggish. He definitely recommends the pyramid device.
confused. what company are you talking to? What gets "sluggish"?
"Pyramid device", you mean the power supply in your first post?

Sorry PIRs aren't going to "get sluggish" and you need to be careful about giving them too much voltage you could damage them. Whoever you're talking to is just trying pretty hard to get you to buy their product even if it means giving you bad / inaccurate information.
 
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