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OSCD Demo

tmjnijssen·OSCD_demo_PCB

OSCD Demo PCB layout, top view — open source ESP32 board by tmjnijssen
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About the OSCD Demo PCB

OSCD Demo is an open source ESP32 PCB design by tmjnijssen, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 94.6 × 94.6 mm, with 76 components from 24 distinct parts.

Its main chip is the ESP32-C3-MINI-1, from the ESP32 family. Other key parts include the USBLC6-2SC6, LSM6DS3, HT7533-1-SOT89, APDS-9306-065 and MPR121QR2. By type, the board carries 31 resistors, 16 capacitors, 15 diodes, 6 ICs, 5 switches and 3 connectors.

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 OSCD Demo

USBLC6-2SC6ESP32-C3-MINI-1LSM6DS3HT7533-1-SOT89APDS-9306-065MPR121QR2

OSCD Demo bill of materials (BOM)

76 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2SC6
U1
1
ESP32-C3-MINI-1
U2
1
LSM6DS3
U3
1
HT7533-1-SOT89
U4
1
APDS-9306-065
U5
1
MPR121QR2
U6
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
2
CONN_01X12
Conn_01x12
J2, J3
1
C720477
RESET
SW1
1
C720477
BOOT
SW2
3
C2837531
PB
SW3, SW4, SW5
12
WS2812B
D1, D2, D3, D4, D5, D6, D7, D8 +4
3
1N5819WS
D16, D17, D18
1
1u
C1
6
10U
10u
C2, C12, C13, C14, C15, C16
8
100N
100n
C3, C4, C5, C6, C7, C8, C17, C18
1
4.7N/1KV
4.7n/1kV
C11
9
10K
10k
R1, R2, R3, R6, R7, R12, R13, R14 +1
2
5K1
5k1
R4, R5
12
C17477
0R
R9, R10, R21, R22, R23, R24, R25, R27 +4
Show 4 more
QtyPartRefs
1
1M
R11
2
4K7
4k7
R15, R16
1
C17819
75k/1%
R17
4
100R
R29, R30, R35, R36

OSCD Demo 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.

OSCD Demo: common questions

What microcontroller does the OSCD Demo use?

The OSCD Demo is built around the ESP32-C3-MINI-1, from the ESP32 family.

How big is the OSCD Demo PCB?

The OSCD Demo measures 94.6 × 94.6 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the OSCD Demo?

76 components, from 24 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 OSCD Demo 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 OSCD Demo 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 OSCD Demo 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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