Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 22:50 15 Jul 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Electronics : Cheap 12v LED’s

     Page 2 of 2    
Author Message
M Del
Senior Member

Joined: 09/04/2012
Location: Australia
Posts: 155
Posted: 04:00pm 12 Apr 2015
Copy link to clipboard 
Print this post

Rusty

At that price I should get you to mail me some, $15 a pack every where here.

Mark
 
Eugeneo

Newbie

Joined: 12/04/2015
Location: Canada
Posts: 20
Posted: 07:29pm 13 Apr 2015
Copy link to clipboard 
Print this post

  Gizmo said   Tested one at a few different voltages. They work down to 6 volts with no change in intensity, but under 5.5v they dim and drop out. Over 18 volts the intensity drops off, and the current goes up, which cant be good! Some readings

6v, 630mA, 3.78watts
12v, 260mA, 3.12watts
24v, 440mA, 10.6watts

So at 24v I expect they would quickly cook and die.

Glenn


It almost sounds like the PWM hit it's minimum duty, try increasing the inductor or adding more windings to it. If the IC can handle it - it could be that simple.


 
dwyer
Guru

Joined: 19/09/2005
Location: Australia
Posts: 574
Posted: 06:46pm 17 Apr 2015
Copy link to clipboard 
Print this post

  Gizmo said   Hi Ian

Will see how long they last. I've been using them for a few months now, so far so good, and they dont get hot so should last longer.

2 of LED flood light one of them 1/4 and 3/4 are working




























Anyway l have pull apart one of the flood lamp and found one of LED
burn out and that was brought from Bunning has removed from shelves for some reason
All the best Ian

All the best Ian
 
Georgen
Guru

Joined: 13/09/2011
Location: Australia
Posts: 462
Posted: 03:25pm 22 Apr 2015
Copy link to clipboard 
Print this post



Would replacement of failed ones bring it back to life?

Probably some kind of heat removal could help here too.
George
 
M Del
Senior Member

Joined: 09/04/2012
Location: Australia
Posts: 155
Posted: 09:57pm 23 Apr 2015
Copy link to clipboard 
Print this post

I have a bunch of 12v 20w panels, bought em cheapish, as well as some of these lights.

My plan is to combine 3 of these lights, a 15ahr 12v battery, a timer/switch assy, solar panel and regulator. I believe I should be able to light the inside of my two sheds and not kill this battery size.

Reason for the timer, wife forgets (refuses) to turn shed lights off after use , old system is 12 v fluro, battery (old towmotor battery, N70 so called hybrid semi deep cycle?????) switch and 5 w panel.
The timer would be set for on off cycle 6pm-6am, this gives me a chance to see if any lights are on early evening.
Or is there a 12v push switch that powers on for 30-40 minutes?

The panel will get 7-8 hours of sun, about 4-5 hours full.

Is there anything I am missing. If I get this right she will let me go bigger with a semi grid connect hybrid for the fridge/freezer.

Mark
 
BobD

Guru

Joined: 07/12/2011
Location: Australia
Posts: 935
Posted: 10:25pm 23 Apr 2015
Copy link to clipboard 
Print this post

  M Del said   Or is there a 12v push switch that powers on for 30-40 minutes?

You can get electronic switches or just go to an electrical supplier like Middys or Lawrence & Hanson and ask them for a push button mechanical timer switch. Clipsal has several that could do the job and other manufacturers also.
 
M Del
Senior Member

Joined: 09/04/2012
Location: Australia
Posts: 155
Posted: 11:51am 24 Apr 2015
Copy link to clipboard 
Print this post

Thanks BobEdited by M Del 2015-04-25

Mark
 
     Page 2 of 2    
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025