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Main => Main Forum => Topic started by: laserbones on August 11, 2014, 02:14:59 am

Title: Using wall wart adapter for Led-Wiz, have grounding question.
Post by: laserbones on August 11, 2014, 02:14:59 am

Hey Guys,

I'm finalizing my Led-Wiz install. All bank will be powering LEDs at 5v. I ordered a 3amp 5v wall wart power adapter. I've striped the cables which obviously results in a positive, negative, and no ground wire. My assumption is, I run the hot (red) wire to the voltage select bank, cap the neutral (white), and find an additional ground to wire into the GND on the Led-Wiz. Is this correct? If so, what a good ground since I don't have a power supply with a ground? Could I potentially hack together something with this? http://www.amazon.com/RV2735-Rid-Volt-Titanium-Grounding-Probe/dp/B0002DGSWE (http://www.amazon.com/RV2735-Rid-Volt-Titanium-Grounding-Probe/dp/B0002DGSWE)

P.S. This is the wall wart I'm using (Don't buy this it outputs 4.8v-5.4v and isn't stable): http://www.amazon.com/gp/product/B00DHSBFRO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 (http://www.amazon.com/gp/product/B00DHSBFRO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1)

Title: Re: Using wall wart adapter for Led-Wiz, have grounding question.
Post by: Louis Tully on August 11, 2014, 03:28:23 am

.

Title: Re: Using wall wart adapter for Led-Wiz, have grounding question.
Post by: laserbones on August 11, 2014, 04:09:14 am

That makes perfect sense. I should have realized that. Thanks!

Title: Re: Using wall wart adapter for Led-Wiz, have grounding question.
Post by: RandyT on August 12, 2014, 12:19:39 pm

Something doesn't give me a "warm fuzzy" about that supply.  Reviewers indicate that it puts out as much as 5.4v under minimal load, and it drops to 4.8v when loaded.  This is some pretty poor regulation, and could result in a severely shortened LED lifespan.

These cheap supplies are also grossly overrated for current output.  The 3A rating is probably the point at which it melts down if used near that for more than a second or two.  If you have a lot invested in LEDs or other devices, it doesn't make sense to go cheap on the supply.  It can cost you a lot more in the end.

Title: Re: Using wall wart adapter for Led-Wiz, have grounding question.
Post by: laserbones on August 12, 2014, 12:41:52 pm

Randy, your thorough customer support amazes me. I figured I should reply to confirm what you have stated. Last night was supposed to be the final night on the led install. I've been testing everything off USB power, had everything wired up, and decided to test the output voltage of the power supply to make sure. It was jumping between 4.9v and 5.4v consistently. I then went and read the reviews and found the same review you were talking about. I've already trashed it and intend on ordering a good power supply. I'm going to go ahead and note this on the link above to so people stumbling across this don't make the same mistake.

Thanks Randy!