Introduction: Make PCB Pattern of LEDs Arranged in a Circle
Make PCB pattern of 12 LEDs arranged in a circle.
Use LibreOffice calc and KiCad.
Step 1:
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.
.
Step 2:
On LibreOffice calc, they are
=$B$16*SIN(RADIANS(B3))+100
=$B$16*COS(RADIANS(B3))-100
in the cells.
Attachments
Step 3:
The positions of LEDs, Resisters(Pattern1) and Resisters(Pattern2) are shown in the graph draw by calc.
Step 4:
Set obtained coordinates in KiCad.
Step 5:
Set rotation value in KiCad.
Step 6:
Then you can get LEDs and resisters PCB pattern.
