12V PIR to switch 12V lights
 

Are there any suppliers of such devices?

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


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

"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...

"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.

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

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?

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

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?

"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)

You could purchase a caravan inverter to provide 240V.

That would drain the battery very rapidly.

Christian.

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

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.

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.

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

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.

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

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.

Check DIY PIR Motion Detector Wall Switch 12V, 24x7 DIY

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$