I'm not sure if this is possible or what I'd need. I'd like to remove the 12v 5w bulb & holder & replace it with a board that's got amber leds going round in a circle then when the indicator relay is switched it lights up going round in a sequential circle. The lens could be a clear one or amber. Any help much appreciated thanks. Indicators -https://www.ebay.co.uk/itm/126661272538?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=J96SWQCrQMO&sssrc=4429486&ssuid=U-AEN3eCSdy&var=&widget_ver=artemis&media=COPY

 

For future reference, your link, everything from the question mark on is used by the website for tracking your activity. Here's the same link without the tracking:
https://www.ebay.co.uk/itm/126661272538
What you've linked to is an ordinary light. 12 volt but in an LED light source. It has its own internal current regulation so it can be directly hooked up to an automobile 12 volt system.

You talk about "sequential circle". Do you mean one lamp illuminated, then the next, then the next until all the lights are illuminated? If so it's going to take some electronics to control the function. Given that these lights are 12V and the sequential circuit I can imagine - you'll need to be able to switch high power from a low power device. It's not complex but it's not so straight forward either.

 

Further examination on your linked lamps, I don't see anywhere that indicates they are LED. Further down in the page I did see a reference to a 21W filament bulb, which is not LED. The bulbs linked will probably not easily lend themselves to what you want to do. More clarity on your project is needed.

 

Thanks Tony didn't know about the ebay tracking, good to know That link was an example this is actually mine https://www.ebay.co.uk/itm/285082505265? Yes the leds would go round in a circle 1 after the other on/off, on/off, on/off chasing round start to finish until indicator is turned off.

 

OK, so lets find a solution to your goal:

I'd like to remove the 12v 5w bulb & holder & replace it with a board that's got amber leds going round in a circle then when the indicator relay is switched it lights up going round in a sequential circle.

Since you're talking about an automotive bulb and 12 volts I'm assuming you want to create a light effect using LED technology. We're going to need more details on what you're working with. You've seen brake lights that sweep from one side to the other. Your idea seems to be the same sort of thing but the lights are arranged in a circular pattern. IF THAT IS THE CASE (not yelling, just emphasizing) then you're going to need a PCB (Printed Circuit Board) with LED's in the circular pattern you want. You're also going to need LED's that are bright enough to satisfy any DOT regulation (Department Of Transportation). Once you have that you then need a circuit to power those LED's from a 12 volt source. LED's don't work on voltage but rather on current. So at 12 volts you need to regulate the current so as to not burn out the LED's.

Basically you're building a "Chase Light" circuit. Depending on the number of LED's you want to sweep (or chase) your circuit will need to be able to handle the number of LED's in the sweep sequence. A simple decade counter can count up to 10. Two of them paired can count up to 100, though I wouldn't want to sweep 100 LED's. 10 should be sufficient. Each output of the decade counter will provide power to a single LED (or set of LED's). The amount of current needed will likely need to be handled by a transistor or MOSFET.

While this kind of circuitry is easy to those who know how, for a beginner it's a little more confusing. There are a number of things you need to consider. How much power is available, how much power the circuit and LED's will be needed, how to handle the amount of heat that will be generated by the project and the useful speed of the sweep. I'm sure there are other considerations as well. These are the things you need to tackle. We can help. We won't do it FOR you, we will HELP you.

 

Ok i guess ill need to get some measurements 1st to see if whats needed will fit inside the lens. Thanks

 

The second light you linked to is also an incandescent light fixture. It doesn't lend itself to chase lighting, though it could be made to do so. Here's a link to a video I made of a chase circuit. This one is 30 LED's long just using two decade counters. What it sounds like you want is something you're going to have to build. So let's get some numbers down: What voltage do you plan on using? WHERE do you plan on using it? The second question is highly critical because if you're building this to be in an automotive application then there's going to be far more to the circuit than just the chaser. You'll need to suppress all voltage spikes and dips, which automotive electronics are constantly subjected to. Failure to guard against spikes and dips will bring an early end to your project.

So, what voltage?
Where will it live?
How bright do you want it?
How fast do you want it to sweep?
If you want it in an automotive tail light then you're going to have to figure out how much space you have and what configuration you're going to want the lights to be in, whether circular or circle around a perimeter of some odd shape, etc.