HardLabs

Watch2 (copy)

atctwo·watch-II·design_files/watch2_board/watch2 (copy).kicad_pcb

Watch2 (copy) PCB layout, top view — open source ESP32 board by atctwo

About the Watch2 (copy) PCB

Watch2 (copy) is an open source ESP32 PCB design by atctwo, published on GitHub under the MIT license. It is a board measuring 48.5 × 42.9 mm, with 70 components from 43 distinct parts.

Its main chip is the ESP32-WROVER, from the ESP32 family. Other key parts include the FT230XS, MCP73831-2-OT, MAX17043G+U, MAX16150AUT+T and MAX604. By type, the board carries 32 resistors, 9 ICs, 8 connectors, 8 capacitors, 5 diodes and 3 transistors.

It belongs with the wearables designs in this gallery.

From the project

Firmware for my custom smart-ish-watch, mark II

This folder has a few different subfolders, explained below. The schematic and PCB for the watch were designed using KiCad. All of the development on the current form of the schematic + PCB takes place in the watch2board` folder. The case for the watch was designed in OpenSCAD, and was designed to be 3D printed. The rest of the folders are kept for archival purposes.

Main components on the Watch2 (copy)

FT230XSMCP73831-2-OTMAX17043G+UMAX16150AUT+TMAX604MCP23008-xSSESP32-WROVERMAX98357AETE+TTSOP38238

Watch2 (copy) bill of materials (BOM)

70 components, 43 distinct parts.

QtyPartRefs
1
FT230XS
U1
1
MCP73831-2-OT
U2
1
MAX17043G+U
U3
1
MAX16150AUT+T
U4
1
MAX604
U5
1
MCP23008-xSS
U6
1
ESP32-WROVER
U7
1
MAX98357AETE+T
U8
1
TSOP38238
U9
3
Q_NPN_BCE
Q1, Q2, Q3
1
USB_C_Receptacle_USB2.0
J1
1
STEMMA QT
J2
1
UART Connector
J3
2
Conn_01x03_Male
J4, J5
1
TFT Connector
J6
1
Torch Connector (main board)
J7
1
Torch Connector (daughter board)
J8
1
Battery_Cell
BT1
1
Panasonic_EVQPUJ_EVQPUA
IO0
1
Speaker
LS1
Show 23 more
QtyPartRefs
1
SPH0645LM4H-B
MK1
1
SW_Push
SW2
1
LED
D1
1
TX
D2
1
RX
D3
1
LED_TORCH
D4
1
LED_IR
D5
5
0.1uF
C1, C5, C6, C7, C8
2
10uF
C2, C4
1
10nF
C3
10
1k
R1, R6, R10, R14, R15, R17, R18, R22 +2
3
4k7
R2, R3, R23
2
27R
R4, R5
2
5k1
R7, R8
1
2k
R9
5
R
R11, R12, R13, R19, R20
1
180R
R16
1
4k1
R21
1
680k
R24
2
100k
R25, R26
1
10k
R27
2
100R
R28, R31
1
68R
R29

Watch2 (copy) design files

The KiCad project lives in the atctwo/watch-II repository on GitHub; these links point at the commit this page was built from.

Watch2 (copy): common questions

What microcontroller does the Watch2 (copy) use?

The Watch2 (copy) is built around the ESP32-WROVER, from the ESP32 family.

How big is the Watch2 (copy) PCB?

The Watch2 (copy) measures 48.5 × 42.9 mm and is 1.6 mm thick.

How many components are on the Watch2 (copy)?

70 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the Watch2 (copy) design files?

From the atctwo/watch-II repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Watch2 (copy) design in my own project?

Yes, under the terms of its MIT license, which atctwo chose for the repository.

Can I test firmware for the Watch2 (copy) 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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