Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-05-2019, 01:38 PM   #1 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 7,066

Acura TSX - '06 Acura TSX
90 day: 28.07 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 27.08 mpg (US)
Thanks: 2,329
Thanked 2,738 Times in 2,028 Posts
LED Strip Lights

I've got some cheap weatherproof LED lights that are prone to rapidly failing. First a color stop working at first, followed by more colors and finally the LED will not function at all.

At first I thought the urethane covering the LED strip was causing them to overheat, but I just did an experiment on a small section where I slowly peeled back the urethane while the LEDs were on. Just as the urethane is pulled away from the center of the LED, it stops working. Pressing it back in gets it to work again. It seems the PN junctions are exposed and the urethane contact is needed for them to work.

I think the LEDs are not burning out, but losing contact with the urethane over time. My question is, what sort of LED tech requires urethane to operate?

Anyhow, I can't recommend the weatherproof ones since they don't last.

Attached Thumbnails
Click image for larger version

Name:	IMG_4986.JPG
Views:	40
Size:	177.0 KB
ID:	25590  
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
The Following User Says Thank You to redpoint5 For This Useful Post:
Ecky (03-09-2019)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-05-2019, 07:45 PM   #2 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: Earth
Posts: 5,209
Thanks: 225
Thanked 807 Times in 591 Posts
Maybe it's just that the urethane keeps pressure on a contact? Have you tried for instance clampin a strip of wood against the back?
  Reply With Quote
The Following User Says Thank You to jamesqf For This Useful Post:
Fat Charlie (10-17-2019)
Old 03-05-2019, 08:15 PM   #3 (permalink)
EcoModding Newb
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 7,066

Acura TSX - '06 Acura TSX
90 day: 28.07 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 27.08 mpg (US)
Thanks: 2,329
Thanked 2,738 Times in 2,028 Posts
You can barely tell from the photo, but I left a button of urethane in the last LED that had the strip of urethane pulled away. That little bit is enough to allow the LED to operate. Pull it out and it stops working. It seems the urethane itself has electrical properties to make the LED work, but perhaps it's just putting pressure on the PN junction?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 03-09-2019, 07:34 AM   #4 (permalink)
Master EcoModder
 
Ecky's Avatar
 
Join Date: Dec 2011
Location: Vermont
Posts: 3,656

Gaptooth (retired) - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 54.26 mpg (US)

Such Fit - '07 Honda Fit Sport
90 day: 41.27 mpg (US)

Connect - '15 Ford Transit Connect XL
90 day: 23.73 mpg (US)

K-sight - '00 Honda K-sight
90 day: 39.01 mpg (US)
Thanks: 1,403
Thanked 1,526 Times in 967 Posts
At work we have a silicone spray we put on all electronics which will be used in highly corrosive environments. Might be worth a try?
  Reply With Quote
Old 08-27-2019, 07:27 AM   #5 (permalink)
EcoModding Lurker
 
Join Date: Aug 2019
Location: London
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Check these variants www.bestadvisers.co.uk/led-light-bars. There is different sizes. I'm using 22 for my Chevy.
__________________
Can't imagine my life without my car collection. Looking for vintage BMW.
  Reply With Quote
Old 10-17-2019, 12:09 AM   #6 (permalink)
EcoModding Lurker
 
Join Date: Jan 2018
Location: Ga
Posts: 46
Thanks: 1
Thanked 4 Times in 4 Posts
Quote:
Originally Posted by robincooper View Post
Check these variants www.bestadvisers.co.uk/led-light-bars. There is different sizes. I'm using 22 for my Chevy.
Those light bars are different from strip lights.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com