Bookshelves

Construction Plans

LED Strips

LED Strip Mapping

Strip	Arduino Pin	Number of LEDs
Strip 1	2	277
Strip 2	3	277
Strip 3	4	24
Strip 4	5	39
Strip 5	6	14
Strip 6	7	9
Strip 7	8	105
Strip 8	9	65

The LEDs are WS2812B chips, with color order GRB.

Demo arduino code

Here's a demo sketch that shows a rainbow pattern with sparkles: demo_reel_bookcase.ino It has all the correct configuration for the various strip lengths and led types.

LED segments

If you want to do animations that take into account the specific locations of the leds on the bookcase, here's a complete mapping of each led segment, where a segment is defined as the strip of led between any intersection with another led strip.

segment, strip, start_index, num_leds
1, strip2, 0, 40
2, strip2, 40, 65
3, strip1, 0, 41
4, strip8, 0, 40
5, strip2, 105, 66
6, strip4, 0, 24
7, strip4, 24, 5
8, strip4, 29, 10
9, strip1, 41, 26
10, strip3, 0, 10
11, strip6, 0, 9
12, strip8, 40, 10
13, strip5, 0, 4
14, strip5, 4, 10
15, strip3, 10, 14
16, strip8, 50, 15
17, strip7, 0, 25
18, strip7, 25, 15
19, strip7, 40, 65
20, strip1, 67, 105
21, strip2, 171, 106
22, strip1, 172, 105