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  #1   Report Post  
JB
 
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Default 12V PIR to switch 12V lights

Are there any suppliers of such devices?

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PC Paul
 
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"JB" wrote in message
oups.com...
Are there any suppliers of such devices?


http://www.12voltz.co.uk/specialist.htm


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PC Paul
 
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"PC Paul" wrote in message
o.uk...
"JB" wrote in message
oups.com...
Are there any suppliers of such devices?


http://www.12voltz.co.uk/specialist.htm


Oops. Or you *could* go to http://www.bullybeef.co.uk/cctv_cameras.htm at
1/10 the price...


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PC Paul
 
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"PC Paul" wrote in message
o.uk...
"JB" wrote in message
oups.com...
Are there any suppliers of such devices?


http://www.12voltz.co.uk/specialist.htm


Aaargh!

After 2 duff £100+ links, how about this for £49.95?

http://www.henrys.co.uk/cctv/ars.htm

Still seems an awful lot though.


  #5   Report Post  
Owain
 
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JB wrote:
Are there any suppliers of such devices?


Standard intruder alarm PIR, with a 12V relay (car headlight or starter
motor relay?) to switch the high-current load.

An intruder alarm PIR probably won't switch the load directly.

Owain




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Andrew Gabriel
 
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In article ,
Owain writes:
JB wrote:
Are there any suppliers of such devices?


Standard intruder alarm PIR, with a 12V relay (car headlight or starter
motor relay?) to switch the high-current load.


Intruder alarm PIR will only latch on for a second or two.
You would probably need some extra logic to latch on for
a reasonable time period. Also, might want some logic
to prevent it operating unless it's dark.

--
Andrew Gabriel
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JB
 
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No mains available without digging up 100ft of garden, just a 12V
battery which I will charge periodically.




Rob Morley wrote:
In article .com,
"JB" says...
Are there any suppliers of such devices?


Can you not just use a mains PIR to switch the 12V transformer?


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Bob Mannix
 
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"JB" wrote in message
oups.com...
No mains available without digging up 100ft of garden, just a 12V
battery which I will charge periodically.


You could purchase a caravan inverter to provide 240V.


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)


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Christian McArdle
 
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You could purchase a caravan inverter to provide 240V.

That would drain the battery very rapidly.

Christian.




  #11   Report Post  
Grunff
 
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JB wrote:
Are there any suppliers of such devices?


http://www.maplin.co.uk/Module.aspx?ModuleNo=26922&doy=8m7D

You'll need to use it to drive a suitable relay, such as:
http://www.maplin.co.uk/module.aspx?ModuleNo=2512&doy=8m7


--
Grunff
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Dave Plowman (News)
 
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In article .com,
JB wrote:
No mains available without digging up 100ft of garden, just a 12V
battery which I will charge periodically.



Maplin do a kit which runs off 12 volts.

http://www.maplin.co.uk/Search.aspx?...mp;source=1 5

--
*Reality? Is that where the pizza delivery guy comes from?

Dave Plowman London SW
To e-mail, change noise into sound.
  #13   Report Post  
Dave Plowman (News)
 
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In article ,
Dave Plowman (News) wrote:
No mains available without digging up 100ft of garden, just a 12V
battery which I will charge periodically.



Maplin do a kit which runs off 12 volts.


http://www.maplin.co.uk/Search.aspx?...mp;source=1 5


Which added to Grunff's PIR should give what you want.

--
*They call it PMS because Mad Cow Disease was already taken.

Dave Plowman London SW
To e-mail, change noise into sound.
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Christian McArdle wrote:
You could purchase a caravan inverter to provide 240V.


That would drain the battery very rapidly.

Christian.


Why?

The battery capacity is the same for a given load, 12V at n amps or
240V at n/20 amps less some for the inefficiency of the inverter.

MBQ

  #16   Report Post  
Christian McArdle
 
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The battery capacity is the same for a given load, 12V at n amps or
240V at n/20 amps less some for the inefficiency of the inverter.


Because it will draw loads of current when off, unlike a 12V PIR sensor.

Christian.


  #17   Report Post  
JB
 
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Thanks for the replies - seems that there isn't an off the shelf
product.

  #18   Report Post  
JB
 
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Actually I found what I wanted...

Its a Ring Ultra 12V PIR sensor controlling a security light, for sale
at caravan accessory shops. Cost me =A325 off ebay.

JB wrote:
Thanks for the replies - seems that there isn't an off the shelf
product.


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Junior Member
 
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Quote:
Originally Posted by JB View Post
Are there any suppliers of such devices?
Check DIY PIR Motion Detector Wall Switch 12V, 24x7 DIY
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Junior Member
 
Location: Romania
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Default

Quote:
Originally Posted by JB View Post
Are there any suppliers of such devices?
This is the're looking for?
PIR and Light switch for solar systems - Do it yourself - Green Energy

This 12 Pir/light sensor swich you can buy it on ebay at ~ 10$
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