4 layers83.1 × 92.5 mm
4 layers22.9 × 14 mm
I2c led
lbthomsen/i2c_led1Creating a I2C RGB LED Board From Scratch
- Size
- 22.9 × 14 mm
- Copper layers
- 4
- Thickness
- 1.2 mm
- Parts
- 15
- Nets
- 23
- Pads
- 72
- Tracks, vias
- 131, 31
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 26 May 2025
- Updated
- 14 Jul 2025
Overview
I2c led is an open-source printed circuit board by lbthomsen, from the lbthomsen/i2c_led repository on GitHub. It is a 4-layer board of 22.9 × 14 mm with 15 parts on 23 nets, routed with 131 tracks and 31 vias.
It is built around the AW9523BTQR. Its parts include 5 diodes, 3 capacitors, 3 resistors, 1 IC and 1 connector. It belongs with the lEDs and displays boards of this library.
Main components
1README
README.mdi2c_led
Page on the STM32World wiki: https://stm32world.com/wiki/I2C_RGB_LED_Board
Youtube playlist with all the live streams: https://www.youtube.com/playlist?list=PLVfOnriB1RjW1bjvfdfvBH_yly3bV6s8T
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | LED_RABG | i2c_led:RGB | D1, D2, D3, D4, D5 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C3 |
| 2 | 4k7 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged2Bar12_RoundedPad1.0x1.5mm | AD0, AD1 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | AW9523B | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U1 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J1 |
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Questions
How big is the I2c led PCB?
It measures 22.9 × 14 mm and has 4 copper layers, 1.2 mm thick.
What parts does the I2c led use?
15 parts, built around the AW9523BTQR. 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 I2c led KiCad files?
From the lbthomsen/i2c_led repository on GitHub, at the commit this page was made from: the board is pcb/i2c_led.kicad_pcb and its schematic pcb/i2c_led.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the I2c led design in my own project?
Its repository states no licence, so its author keeps all rights: ask lbthomsen before reusing the design.