topic Place components on a circumference in EAGLE Forum

Place components on a circumference

CarloTentelli9165 — Thu, 02 Nov 2017 14:10:33 GMT

Hi,

I've a lot of leds to placment on a circle (about 50). There's an automatic disposition?
In attached an example(14 leds).

PS I will wish to use maximun precision(0.01). At times the space is very very small

Best regards.

Re: Place components on a circumference

rachaelATWH4 — Thu, 02 Nov 2017 14:51:30 GMT

Hello,

You can use the command line and polar coordinates to place your LED's in a circle without too much effort.

First of all you want to set a mark point at the centre of where the circle will be.

MARK (x y);

Then you move your LED's first to the mark and then to their correct location as follows:

MOVE LED1 (R 0 0); MOVE LED1 (P radiusVal angle);

Where radiusVal is the radius of the circle (clearly!) and angle is incremented for each LED in the circle.

So lets say I want to place 12 LED's, LED1 through LED12 in a 30mm radius centred at 50mm x 75mm on the board. 360/12 = 30.

GRID MM; MARK (50 75);
MOVE LED1  (R 0 0); MOVE LED1  (P 30 0);
MOVE LED2  (R 0 0); MOVE LED2  (P 30 30);
MOVE LED3  (R 0 0); MOVE LED3  (P 30 60);
MOVE LED4  (R 0 0); MOVE LED4  (P 30 90);
MOVE LED5  (R 0 0); MOVE LED5  (P 30 120);
MOVE LED6  (R 0 0); MOVE LED6  (P 30 150);
MOVE LED7  (R 0 0); MOVE LED7  (P 30 180);
MOVE LED8  (R 0 0); MOVE LED8  (P 30 210);
MOVE LED9  (R 0 0); MOVE LED9  (P 30 240);
MOVE LED10 (R 0 0); MOVE LED10 (P 30 270);
MOVE LED11 (R 0 0); MOVE LED11 (P 30 300);
MOVE LED12 (R 0 0); MOVE LED12 (P 30 330);

Best Regards,

Rachael

Re: Place components on a circumference

C.Nicks — Thu, 02 Nov 2017 16:04:27 GMT

There is also a ulp that automates what Rachael posted. The ulp is called component-array.ulp, written by Jorge. It works for placing rectangular and circular arrays.

component-array.ulpAfter running circular

Re: Place components on a circumference

rachaelATWH4 — Thu, 02 Nov 2017 16:39:20 GMT

@C.Nicks wrote:

There is also a ulp that automates what Rachael posted. The ulp is called component-array.ulp, written by Jorge. It works for placing rectangular and circular arrays.

Oh very cool! I didn't know about that one. I was just about to write something similar to automate it

I was thinking it would be good to able to use the components in a group as the basis for the array placement or specify them with a string such as LED1-4,LED11-14,LED21-24 and internally it work out what that means so you don't have to type every single one in. Maybe I could add something like this to my moveTools.ulp?

Best Regards,

Rachael