Ultim bus
wyolum·ultim8x8·kicad/ultim_8x8_v0/ultim_bus.kicad_pcb
About the Ultim bus PCB
Ultim bus is an open source PCB design by wyolum, published on GitHub. It is a 2-layer board measuring 198.1 × 63.5 mm, with 86 components from 2 distinct parts.
By type, the board carries 71 connectors and 15 modules.
It belongs with the displays & leds designs in this gallery.
From the project
Ultimate LED panel. 8x8 matrix. APA102 RGB LEDs
ultim8x8 is an APA102 RGB LED based panel consisting of 8x8 matrix. Panels can be chained to produce larger matrices. Besides +5V and GND, each board requires a CLocK and DATa signal. Each board has CLocK and DATa IN and OUT terminals. When cascading boards, the OUT from one board goes to the IN of the next board.
Each LED can require up to 60mA current at 5V for White light at full brightness. This means driving ALL the 64 LEDs at full brightness White color will require 3.8A Amps. You can get away with lower Amps if you drive LEDs at lower brightness or don't light them all up at the same…

Ultim bus bill of materials (BOM)
86 components, 2 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 15 | MouseBite | mouse-bite-2.54mm-slot | M1, M2, M3, M4, M5, M6, M7, M8 +7 |
| 71 | CONN_1 | Screw | P1, P2, P3, P4, P5, P6, P7, P8 +63 |
Ultim bus design files
The KiCad project lives in the wyolum/ultim8x8 repository on GitHub; these links point at the commit this page was built from.
Ultim bus: common questions
How big is the Ultim bus PCB?
The Ultim bus measures 198.1 × 63.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ultim bus?
86 components, from 2 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Ultim bus design files?
From the wyolum/ultim8x8 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Ultim bus design in my own project?
The repository has no license, so all rights stay with wyolum. Use it as a reference, and ask the author before reusing the design.