Make PCB Pattern of LEDs Arranged in a Circle

Make PCB pattern of 12 LEDs arranged in a circle.

Use LibreOffice calc and KiCad.

http://neo-sahara.com/wp/PIC16F887_12_LEDs

http://neo-sahara.com/wp/LED_arranged_in_circle

Coordinates (x, y) of LEDs and resisters position are obtained by

x = r sin( s ) + a
y = r cos( s ) + b

where x, y are the coordinates of the points on the circle,

r is the radius of the circle,

s is the angle

and a, b are the coordinates of the center of the circle.

.

On LibreOffice calc, they are

=$B$16*SIN(RADIANS(B3))+100

=$B$16*COS(RADIANS(B3))-100

in the cells.

The positions of LEDs, Resisters(Pattern1) and Resisters(Pattern2) are shown in the graph draw by calc.

Set obtained coordinates in KiCad.

Set rotation value in KiCad.

Then you can get LEDs and resisters PCB pattern.

http://neo-sahara.com/wp/LED_arranged_in_circle