2 layers297.2 × 180.3 mm
4 layers49.5 × 51.5 mm
Limelight
cillian64/limelightDriver code for the LED displays distributed by limehouse labs, based on https://git.eta.st/eta/led-panel-zone
- Size
- 49.5 × 51.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 71
- Pads
- 219
- Tracks, vias
- 435, 42
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 8 Jun 2024
- Updated
- 25 Jan 2026
Overview
Limelight is an open-source printed circuit board by cillian64, from the cillian64/limelight repository on GitHub. It is a 4-layer board of 49.5 × 51.5 mm with 25 parts on 71 nets, routed with 435 tracks and 42 vias.
It is built around the 74HCT245. Its parts include 7 resistors, 4 ICs, 4 diodes, 3 capacitors and 3 connectors. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdLimelight
Driver hardware and software for the DMG1083-based LED tiles distributed by Limehouse Labs. Heavily based on eta's work.
The PCB is somewhere between eta's rev1 and rev2 designs - I use the pin assignments from rev2 (so it'll work with the same software) but instead of a discrete RP2040 I return to a Pi Pico footprint, because I plan to use a Pico WH running standalone (so I want Wi-Fi) instead of USB-control. And I use PTH packages for the shift registers for ease of hand assembly.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R5 |
| 3 | 100nF | Capacitor_SMD:C_0402_1005Metric | C8, C9, C10 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric | R4, R8, R9 |
| 3 | 74HCT245 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U4, U5, U6 |
| 1 | +5V IN | Connector_Wire:SolderWire-2.5sqmm_1x02_P8.8mm_D2.4mm_OD4.4mm | J1 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_Horizontal | J3 |
| 1 | DMG1083 Panel Output | Connector_PinHeader_2.54mm:PinHeader_2x15_P2.54mm_Vertical | J2 |
| 1 | D_Schottky | Diode_SMD:D_SMA | D4 |
| 1 | LED1 | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LED2 | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | PWR | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | Pi Pico | MCU_RaspberryPi_and_Boards:RPi_Pico_SMD_TH | U1 |
| 1 | RESET | libraries:TS-1187A-B-A-B | SW3 |
| 1 | SW1 | libraries:TS-1187A-B-A-B | SW1 |
| 1 | SW2 | libraries:TS-1187A-B-A-B | SW2 |
The 24 most common of 25 parts.
Questions
How big is the Limelight PCB?
It measures 49.5 × 51.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Limelight use?
25 parts, built around the 74HCT245. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Limelight KiCad files?
From the cillian64/limelight repository on GitHub, at the commit this page was made from: the board is hardware/limelight.kicad_pcb and its schematic hardware/limelight.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Limelight design in my own project?
Its repository states no licence, so its author keeps all rights: ask cillian64 before reusing the design.
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