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LED chaser

tmjnijssen·OSCD_demo_PCB·workshop/led_chaser_schematic_only/led_chaser_schematic_only.kicad_pcb

This repository ships a schematic but no board layout.
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About the LED chaser PCB

LED chaser is an open source ESP32 PCB design by tmjnijssen, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board, with 29 components from 18 distinct parts.

Its main chip is the ESP32-C3-MINI-1, from the ESP32 family. Other key parts include the USBLC6-2SC6. By type, the board carries 11 diodes, 5 capacitors, 4 test points, 4 resistors, 2 ICs and 1 connector.

It belongs with the iot & wireless, sensors and wearables designs in this gallery.

From the project

Open Science Community Delft demonstration PCB

A demonstration / teaching PCB built by the Open Science Community Delft to show what an open hardware project looks like in practice: full sources, an open licence, and everything needed to have the board made and reprogrammed by anyone.

It is a round, ~93 mm ESP32-C3 board shaped like the OSCD logo, with a ring of 12 addressable RGB LEDs, three sensors on a shared I²C bus, capacitive touch pads, and three push buttons. Plug it into USB-C, and the demo firmware lights the ring in response to tilt, touch, ambient light, and button presses.

Main components on the LED chaser

USBLC6-2SC6ESP32-C3-MINI-1

LED chaser bill of materials (BOM)

29 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2SC6
NE555
U1
1
ESP32-C3-MINI-1
4017
U2
1
USB_C_RECEPTACLE_USB2.0_16P
Conn_01x02
J1
1
100k
RV1
1
C720477
ENABLE
SW1
1
VCC
TP1
1
GND
TP2
1
CLOCK
TP3
1
ENABLE
TP4
10
WS2812B
LED
D1, D2, D3, D4, D5, D6, D7, D8 +2
1
WS2812B
1N5819
D11
1
10uF
C1
1
10U
10nF
C2
2
100N
10nF
C3, C4
1
100N
10uF
C5
1
10K
10k
R1
2
10K
1k
R2, R3
1
5K1
10k
R4

LED chaser design files

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

LED chaser: common questions

What microcontroller does the LED chaser use?

The LED chaser is built around the ESP32-C3-MINI-1, from the ESP32 family.

How big is the LED chaser PCB?

The LED chaser has 2 copper layers and is 1.6 mm thick.

How many components are on the LED chaser?

29 components, from 18 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 LED chaser design files?

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

Can I use the LED chaser design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which tmjnijssen chose for the repository.

Can I test firmware for the LED chaser 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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