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#195718 1-May-2016 12:31
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What would you do with those old PIRs? I've made "Candle light" movement sensor.

 

The reason is simple - we are getting the cat soon and I was tasked to do something to see where I am going at night and did not step on the kitten :-)

 

Money can buy anything these days, security lights out of the box are non-expensive but so goes the fun away :-)

 

So instead of doing it an "easy way" and going to the warehouse - I've done it the "fun way":

 

Recourses:

 

1. PIR sensor from the decommissioned alarm

 

2. Mains to 12V adapter from whatever network system

 

3. MOSFET + 2 Diodes + 3Caps + 1 micro relay (or transistor equivalent could be used instead) - all from recycled power supplies

 

4. Empty canister from the Candle Light

 

5. 2 x 6V bulbs in series making 12V form the backlight of the car ODO.

 

End result - lights on for 15 seconds every time you walk:

 

 

If external relay is added - you can switch something else - some people were making "cat repellent" activating water sprinkles :-)

 

 

 

 


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  #1544818 1-May-2016 12:39
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Yep much more fun to make something like this.....plus you're helping the environment by recycling old stuff. smile 





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