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>> Home > Forum > Electrical Related > Flickering LED
Flickering LED
(618 views)
Author Message
Skipper44
(Lieutenant)





Forum Posts: 10
14th Jun 2017 16:19  
>> Permalink
mdlbt.com/30173

Hi,
I have an LED which when I plug in just flickers randomly even with no flicker unit, I have tested the same equipment with other LEDs and they are all fine. This is very annoying as it is a search light! Does anyone know what he problem is / how to fix it?

RNinMunich
(Fleet Admiral!)





Forum Posts: 1126
14th Jun 2017 16:28  
>> Permalink
mdlbt.com/30176

Hi Skipper, I assume a white LED. What voltage are you using and what value series resistor?
Doug 😎
PS If we can't fix it - put it in a Signal Lamp 😉


Young at heart - slightly older in other places 😉 cheers Doug
none
(Fleet Admiral!)





Forum Posts: 185
14th Jun 2017 16:29  
>> Permalink
mdlbt.com/30177

Looks like a bulb change is required

EAGLE
(Lieutenant)





Forum Posts: 43
14th Jun 2017 16:33  
>> Permalink
mdlbt.com/30179

Hi
I think you have got a flickering LED, they are used in old steam tug, to imitate oil lamps. I hope this helps.
Dave

RNinMunich
(Fleet Admiral!)





Forum Posts: 1126
14th Jun 2017 17:04  
>> Permalink
mdlbt.com/30181

He may be right! Flicker LEDs are made for candle lamps, but they are usually only for AC mains lamps! ALL LEDs flicker if you use them on an non-rectified voltage, cos the voltage is constantly switching on and off. The flicker rate is usually between 50/60 to 120Hz so almost all people will never notice it.
If you are using a DC supply it should come on when it has sufficient voltage and current and stay on. UNLESS - it is a DC type with a tiny 'flicker chip' built in! Then your only option is to use it for a signal lamp😉
Otherwise I suspect you may need to reduce the series resistor slightly to push more current through it to keep it on.
What type of LED is it? Do you know the manufacturer and type number?
Cheers Doug 😎


Young at heart - slightly older in other places 😉 cheers Doug
EAGLE
(Lieutenant)





Forum Posts: 43
14th Jun 2017 17:50  
>> Permalink
mdlbt.com/30185

Hi
If you go on to Components web site you will find Flickering LED's, l have used them on my TID. There forward volts is 3.3.
Dave

EAGLE
(Lieutenant)





Forum Posts: 43
14th Jun 2017 17:59  
>> Permalink
mdlbt.com/30186

Hi
Sorry the volts are 2.4.
Dave

Dave M
(Fleet Admiral!)





Forum Posts: 1428
15th Jun 2017 09:29  
>> Permalink
mdlbt.com/30195

Hi Skipper
I have just found exactly the same problem with a LED on my Trent which I am doing some rework on. It's not a constant flicker more a random dimming followed by a couple of flickers. The electrical connection is OK and the problem was with the LED. It's in a tight space and I had damaged the leads into the LED resulting in the fault. I agree with Sonar and believe your best solution is to replace the faulty LED with another if you are sure the electrical connection is OK.
Dave


Live long and prosper

Dave
RNinMunich
(Fleet Admiral!)





Forum Posts: 1126
15th Jun 2017 12:08  
>> Permalink
mdlbt.com/30203

Yep! Quickest easiest way if the other LEDs work in the same circuit ...


Young at heart - slightly older in other places 😉 cheers Doug