What Power adapter?

[steq184]

I have 6 lengths of 2m 3528 leds strips purchased off ebay
Each length has 120 leds.
I have connected all 6 strips to a 12v 3amp power adapter and none of these light up.
I have then tried to connect just 3 strips to the power adapter but still no light.
If I connect just the 1 strip it lights.
So as a 12v 3amp power adapter lights 1 strip what power adapter would I need to light the 6 strips?
The accompanied paperwork states Power: 0.05w/led strip.
The ebay seller does not sell power adapters unfortunately.
Thankyou for taking the time to help

 

[PrenticeBoyofDerry]

Have you checked that all the strips, light up individually?

 

[ericmark]

LED's are current devices and it is the current that needs controlling not voltage. But as a strip that current control is often built into the strip so often as a unit we control voltage.

0.05w could refer to each LED needing 0.016 amps (assuming white LED which are normally around 3 volt) or 0.001466 amps powered from a 12 volt supply using a switch mode regulator (i.e. no loss).

Strips may required drivers giving a set current or a power supply giving set voltage your description does not say which is required.

So more information is required before an answer can be given.

 

[Taylortwocities]

What is the "power adapter" that you are using.
Where did you get it from?
What is the spec?
Can you post a photo of the writing on it?

EDIT, and have you got the + and - the correct way round?

 

[ban-all-sheds]

I have 6 lengths of 2m 3528 leds strips purchased off ebay

Don't tell me - you chose them because they were really cheap.

The ebay seller does not sell power adapters unfortunately.

And that didn't ring alarm bells?

 

[steq184]

These really cheap leds are working perfectly now.
Never ceases to amaze me just how many people comment without really helping the situation.
I had wired the + & - wrong way round.
Thankyou for the helpful comments on this problem[/youtube]

 

[Taylortwocities]