PIR light 2

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xanthic
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PIR light 2

Postby xanthic » Mon Jul 16, 2012 2:59 pm

I needed a light in the garage, as there was nothing in there (no idea what the previous owners used!). So with a nice strip of Phenoptix LEDs I knocked up a quick PIR light.

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Here's the prototype board and PIR. It needed 2 transistors as the current output from the PIR was tiny.

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A 500 mm strip gives off a fair bit of light. Ideally, I'd have 1 metre of warm white; I think that'll be the next stage.

To tidy it up, I bought a pattress and blank faceplate. Dremel'd out for the diameter of the PIR sensor and glued it in. Here's the finished product.

Image

Rich
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Re: PIR light 2

Postby Rich » Mon Jul 23, 2012 9:39 pm

I like it, looks like something I'd make, any chance of a circuit diagram ?
8-)

xanthic
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Re: PIR light 2

Postby xanthic » Tue Jul 24, 2012 10:59 am

Here you go -

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Q1 is a 2N3904 and Q2 is a 2N2222A. The latter can handle up to 800 mA, I put that in to allow for a bigger strip in the future.

phenoptix
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Re: PIR light 2

Postby phenoptix » Thu Jul 26, 2012 10:11 am

That's really nice and neat! PIRs in those pattress boxes are expensive. Very nice job!

xanthic
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Re: PIR light 2

Postby xanthic » Thu Jul 26, 2012 4:10 pm

Thanks :D Do you or anyone else know if it could be simplified further? I measured 2.4 mA from the output of the PIR. Not sure if there is a better transistor/component for this.

Also, any chance of stocking waterproof/weatherproof LED strips?


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