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Remote Living => Lighting => Topic started by: Harold in CR on December 27, 2014, 12:47:24 PM

Title: LED motion sensors
Post by: Harold in CR on December 27, 2014, 12:47:24 PM

 Does anyone know if these things exist ? I'm not into electronics or technology, as it just slips right out of my head when I lay down.  ::)

 i am changing to LED lighting in our house, and HAD a decent reduction in our electric bill, until the wife started "forgetting" to do stuff, like close doors, turn off lights and stove or oven, etc.

 I'm not sure if she has just taken a different approach to help us save money on electric bills or, if she is getting forgetful more than normal.

 So, I'm looking for 2-3 minute, maybe, of no movement so the 12V LEDs shut down.

 Anyone have any info for this old guy ?/

 Thanks,  Harold

Title: Re: LED motion sensors
Post by: mab on December 27, 2014, 03:36:32 PM

I tried searching for '12v ceiling PIR' and got this:-

http://www.danlers.co.uk/pir-occupancy-switches/42-products/pir/pir-occupancy-switches/ceiling-flush-mounted/26-cefl-pir-12v-ceiling-flush-mounted-pir-occupancy-switch-variants (http://www.danlers.co.uk/pir-occupancy-switches/42-products/pir/pir-occupancy-switches/ceiling-flush-mounted/26-cefl-pir-12v-ceiling-flush-mounted-pir-occupancy-switch-variants)

and

http://www.united-automation.com/content/X10728%20-%20INFRESCO-VR-PIR-12V%20Sensor.pdf (http://www.united-automation.com/content/X10728%20-%20INFRESCO-VR-PIR-12V%20Sensor.pdf)

so they do  make them.

You could also try: '12v PIR occupancy switch'
 
If you want more choice then most of the PIR sensors themselves usually operate at low voltage even if they're built to run off line voltage so with a bit of electronic knowhow you could adapt an off the shelf unit for 12v / 24v - I have a few PIR. floodlight units which are nominally 240v but the electronics actually work at 24v - handy for conversion to my 24v system.

If I remember correctly a lot of the PIR motion sensors used for burgler alarms are 12v though so they may be easier to use

Title: Re: LED motion sensors
Post by: Mary B on December 27, 2014, 05:37:46 PM

We just had a thread on this, look for solar shed lighting...

Title: Re: LED motion sensors
Post by: dnix71 on December 27, 2014, 07:18:40 PM

Complete 12v units any size you want.

http://www.ebay.com/itm/LED-Flood-Light-10W-20W-30W-50W-100W-Lamp-Garden-Security-PIR-Motion-Sensor-HK-/171259799875?pt=LH_DefaultDomain_0&var=&hash=item27dfe12943

Just the detector for $5

http://www.ebay.com/itm/Automatic-DC-12V-24V-8A-Infrared-PIR-Motion-Sensor-Switch-For-LED-light-Hottest-/131326713631?pt=LH_DefaultDomain_0&hash=item1e93ae9f1f

Title: Re: LED motion sensors
Post by: Harold in CR on December 27, 2014, 09:26:35 PM

 Thanks for the info guys. I just left ebay and saw those detectors only. Just never had any idea what the sensors were called.

 Toldjas I don't know anything about electronic stuff.

 Thanks to all for responding

 Harold