Go Back   RCCrawler Forums > Scale Rigs Brand Specific Tech > Traxxas TRX-4
Loading

Notices

Thread: 8030 light kit failure?

Reply
 
LinkBack Thread Tools Display Modes
Old 02-13-2020, 11:09 PM   #1
Newbie
 
Join Date: Jan 2020
Location: Dana Point
Posts: 27
Default 8030 light kit failure?

noticed out of the box the 8030 light kit didn't really dim via the switch on the light bar. Then tonight the lights went from bright to dim to bright to dimmer then to dimmest and then gone for ever over the course of 5 minutes. Multimeter'd the 3v traxxas transformer and got .56v dead consistent. did I waste 90 bucks or is this a fluke?

(battery fully charged, did not damage in any way, using hobby wing brushless system which was fine for about 30 minutes of run time before this failure)
jimyoung2 is offline   Reply With Quote
Sponsored Links
Old 02-14-2020, 07:30 AM   #2
Moderator
 
JatoTheRipper's Avatar
 
Join Date: Sep 2008
Location: PA
Posts: 12,428
Default Re: 8030 light kit failure?

Contact Traxxas. They should replace them if they failed. They have good customer service.
JatoTheRipper is offline   Reply With Quote
Old 02-14-2020, 02:14 PM   #3
Rock Stacker
 
Join Date: Jul 2013
Location: Germany
Posts: 80
Default Re: 8030 light kit failure?

The power supply block is known to fail often.
Sometimes even with thermal effects. Most work, but the fail rate is way too high, far higher than anything industrial would accept.

If it weren't for the crappy design of having all LEDs without resistors on a 2.85V supply i'd say you'd be better off building your own resistor block and power the whole stuff from a BEC.
The light bar has like 30 LEDs all in parallel, so has around 2.9V @ some hundred milliamps, no way to do that with a resistor on 6V BEC.
All the other lamps have only a few LEDs in parallel if at all and work well with standard resistors.
The failure is the power supply having slightly above 2.85V, thus increasing the LED current because there are no resistors and you should never ever connect LEDs without resistors to a voltage regulated supply.

The only solution is to return at least the supply block and hope to get one that has a slightly low voltage.
amigaman is offline   Reply With Quote
Old 02-14-2020, 06:13 PM   #4
Newbie
 
Join Date: Jan 2020
Location: Dana Point
Posts: 27
Default Re: 8030 light kit failure?

Quote:
Originally Posted by amigaman View Post
The power supply block is known to fail often.
Sometimes even with thermal effects. Most work, but the fail rate is way too high, far higher than anything industrial would accept.

If it weren't for the crappy design of having all LEDs without resistors on a 2.85V supply i'd say you'd be better off building your own resistor block and power the whole stuff from a BEC.
The light bar has like 30 LEDs all in parallel, so has around 2.9V @ some hundred milliamps, no way to do that with a resistor on 6V BEC.
All the other lamps have only a few LEDs in parallel if at all and work well with standard resistors.
The failure is the power supply having slightly above 2.85V, thus increasing the LED current because there are no resistors and you should never ever connect LEDs without resistors to a voltage regulated supply.

The only solution is to return at least the supply block and hope to get one that has a slightly low voltage.
wow that's a lot of info, traxxas warrantied me the power supply but being that this one only lasted a week I'm wondering if this is going to be a problem, add a resistor some how?
jimyoung2 is offline   Reply With Quote
Old 02-15-2020, 02:00 AM   #5
Rock Stacker
 
Join Date: Jul 2013
Location: Germany
Posts: 80
Default Re: 8030 light kit failure?

One single resistor won't do, especially if you plan to change brightness with the light bars switch.

With a bit of electronics knowledge you'll notice the lamps are almost all separately wired to the distribution box, and so a bunch of resistors (one per lamp) may give you better results, with the resistors replacing the distribution and power boxes.
Also, it opens up the possibility to use an rc switch to have the lights come up remotely controlled instead of always on.
But the lightbar has a bad circuit and a resistor on it will get hot because of the light bar having lowest possible voltage but very high current.
amigaman is offline   Reply With Quote
Reply



8030 light kit failure? - Similar Threads
Thread Thread Starter Forum Replies Last Post
In Stock - New MyTrickRC Attack LED Light Kit w/ 5" Light Bar for TRX-4 Defender! RPP Hobby RPP Hobby 1 10-11-2018 12:32 PM
Traxxas 8030 Lighting Kit MUD.88 Traxxas TRX-4 8 12-06-2017 03:28 PM
Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 11:36 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com