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ESS Bottom

shrimp-18·ESS-Wristband·src/PCB/ESS_Bottom/ESS_Bottom.kicad_pcb

ESS Bottom PCB layout, top view — open source ESP32 board by shrimp-18
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About the ESS Bottom PCB

ESS Bottom is an open source ESP32 PCB design by shrimp-18, published on GitHub. It is a 2-layer board measuring 70.8 × 51.4 mm, with 14 components from 7 distinct parts.

Its main chip is the ESP32-C3-DEVKITM-1, from the ESP32 family. By type, the board carries 8 connectors, 2 switches, 1 IC and 1 capacitor.

It belongs with the power & battery, iot & wireless and displays & leds designs in this gallery.

From the project

A hardware Project:- Wristband

A gesture-controlled referee wristband that automates match timing in Taekwondo. Using an accelerometer and microcontroller, it detects the referee’s calibrated start and stop gestures and wirelessly updates the central timer visible to everyone. This system removes manual jury control, ensuring accurate, fair, and transparent timekeeping.

- Referee wants to stop the match. - They make a swift hand movement used traditionally in Taekwondo. - Players see this hand movement and stop. - ESSync senses this swift hand movement and sends a signal to the central timer to stop. - The central timer…

ESS Bottom, from the project README
From the project README

Main components on the ESS Bottom

ESP32-C3-DEVKITM-1

ESS Bottom bill of materials (BOM)

14 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-DEVKITM-1
ESP32-C3-DevKitM-1
U3
8
CONN_01X01
Conn_01x01
J5, J6, J7, J8, J9, J10, J11, J12
1
CONN_01X02
Conn_01x02
Battery1
1
CONN_01X08
Conn_01x08
MPU6050
1
Tactile Button, 160gf
XUNPU
S1
1
SW_Slide_DPDT
SW1
1
0.1UF
0.1uF
C1

ESS Bottom design files

The KiCad project lives in the shrimp-18/ESS-Wristband repository on GitHub; these links point at the commit this page was built from.

ESS Bottom: common questions

What microcontroller does the ESS Bottom use?

The ESS Bottom is built around the ESP32-C3-DEVKITM-1, from the ESP32 family.

How big is the ESS Bottom PCB?

The ESS Bottom measures 70.8 × 51.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESS Bottom?

14 components, from 7 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 ESS Bottom design files?

From the shrimp-18/ESS-Wristband 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 ESS Bottom design in my own project?

The repository has no license, so all rights stay with shrimp-18. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the ESS Bottom 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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