Reply
 
Thread Tools Search this Thread
 
Old 11 November 2012, 17:23   #1
Member
 
Country: UK - N Ireland
Town: Belfast
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140 4/stroke
Join Date: Aug 2003
Posts: 181
RIBase
led lights

non boaty but need advice

looking a set of led lights foe a display outside a shop.
Am i right in thinking that i could buy these 5M Led Strip 12V Waterproof red white blue green purple yellow IP65 300SMD DIY | eBay and wire them direct to a small 12v battery and they would work fine and would i get a decent time out of a say 12v 12ah motorbike battery?
no power supply outside shop and i don't need someone tripping over extension leads.

Thanks
__________________
parm is offline   Reply With Quote
Old 11 November 2012, 18:38   #2
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Sounds right, but your run time will depend on exactly how they have the LED's wired up. Normal is each in parallel with a drop resistor, and the value of that determines the current drawn per LED. Sometimes you'll have a number of LED's per circuit, which will increase efficiency at the expense of limiting where you can cut the strip.

jky
__________________
jyasaki is offline   Reply With Quote
Old 11 November 2012, 18:48   #3
Member
 
Country: UK - N Ireland
Town: Belfast
Make: Ribcraft 585
Length: 5m +
Engine: Suzuki 140 4/stroke
Join Date: Aug 2003
Posts: 181
RIBase
ok thanks for that
__________________
parm is offline   Reply With Quote
Old 14 November 2012, 11:30   #4
Member
 
Phil M's Avatar
 
Country: UK - England
Town: Whitehaven
Boat name: Cerberus
Make: Destroyer 5.8
Length: 5m +
Engine: 115hp Merc 4st
Join Date: Oct 2012
Posts: 462
Be a little careful as ideally you need a 12v constant voltage supply. A 12v battery will vary from almost 15v down to 10-11 when flat so you will get considerable dimming over that range and may damage the LED's with the high initial input voltage. You can get LED constant voltage drivers which take an un-regulated 12v input and provide a regulated output, and may even offer some controllable dimming. I'd look for you but have to head out to a meeting. Google shoudl turn something up. As I recall, they are in the region of £10-20.

Phil
__________________
Phil M is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT. The time now is 08:26.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.