Arrange LEDs in circles?

[andrzej23050]

Hello.
I'm designing an RGB LED lamp made out of 80 LEDs. For now, I laid out the LEDs like that:

And I'm pretty happy with the amount of LEDs per each circle.

But now I want to more precisely arrange each of the circles, i.e. I want the distance between LEDs in the given circle to be roughly the same.

How can I achieve that?

I know that this is possible with the draw command, but it doesn't let me specify a range of elements, only the first element instead, that means that I would need to delete all the LEDs besides the ones that I want in particular circle, and then gradually add them when laying out the next circle. I don't really want to do that, that's why I'm asking is there any simpler solution.

[Yura.Ivanov.VLuki · Accepted solution]

You can use the PATTERN command. https://forums.autodesk.com/t5/eagle-forum/round-traces-on-ring-pcb/m-p/9445379#M29599

[C.Nicks · Accepted solution]

There is an older ulp that assists with component array placements that I have made some enhancements to. It allows easy placement of circular and rectangular arrays.
The options I added allow defining the direction the components point, plus additional rotation. This is especially handy when working with surface mount directional parts.
Circular array with additional rotation offset