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LightBar

fujiy·Home·LightBar/hardware/LightBar.kicad_pcb

LightBar PCB layout, top view — open source ESP32 board by fujiy

About the LightBar PCB

LightBar is an open source ESP32 PCB design by fujiy, published on GitHub. It is a 2-layer board measuring 16 × 65 mm, with 26 components from 17 distinct parts.

Its main chip is the ESP32-C3-WROOM-02, from the ESP32 family. Other key parts include the LM2842X. By type, the board carries 9 resistors, 7 diodes, 3 connectors, 2 ICs, 2 capacitors and 1 switch.

It belongs with the iot & wireless designs in this gallery.

From the project

LightBar は ESP32-C3-WROOM-02 を使った 2ch tunable white ライトです。現在は ESPHome + Home Assistant 構成で、以下を維持しています。

LightBar は ESP32-C3-WROOM-02 を使った 2ch tunable white ライトです。現在は ESPHome + Home Assistant 構成で、以下を維持しています。

- OTA 更新 - 2ch PWM の周波数ランダム化と、非重畳な位相分配によるノイズ低減 - NJW4616 の PWM 遅延を見込んだチャネルごとの duty 補正 - 色温度は Kelvin 直線ではなく mired で補間 - 内部 smoothing による滑らかなフェード

実装の中心は lightbar.yaml と lightbarcwwwlight_output.cpp です。

- LightBar/esphome/lightbar.yaml - デバイス本体の ESPHome 設定 - LightBar/esphome/mycomponents/lightbarcwww/ - LightBar 専用 externalcomponents - LightBar/esphome/secrets.yaml - ../../esphome/secrets.yaml への symlink - esphome/secrets.yaml - ESP32Home 共通のローカル専用秘密情報 - esphome/secrets.example.yaml` -…

Main components on the LightBar

ESP32-C3-WROOM-02LM2842X

LightBar bill of materials (BOM)

26 components, 17 distinct parts.

QtyPartRefs
1
ESP32-C3-WROOM-02
U1
1
LM2842X
U2
1
PINHD_1x6_Female
J1
1
Barrel_Jack_Switch
J2
1
USB_B_Micro
J3
1
SW_Push
SW1
1
LED
LED1
2
1A
D1, D2
3
3.6V
D3, D4, D5
2
21V
D7, D8
1
10uH 1.1A
L1
1
50V 1uF
C1
1
6.3V 47uF
C2
2
10k
R1, R3
1
15k
R2
3
1k
R4, R5, R6
3
100k
R8, R9, R10

LightBar design files

The KiCad project lives in the fujiy/Home repository on GitHub; these links point at the commit this page was built from.

LightBar: common questions

What microcontroller does the LightBar use?

The LightBar is built around the ESP32-C3-WROOM-02, from the ESP32 family.

How big is the LightBar PCB?

The LightBar measures 16 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LightBar?

26 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the LightBar design files?

From the fujiy/Home repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the LightBar design in my own project?

The repository has no license, so all rights stay with fujiy. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the LightBar without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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