HardLabs

Watch

Resteral·Watch·hardware/kids_watch.kicad_sch

This repository ships a schematic but no board layout.

About the Watch PCB

Watch is an open source ESP32 PCB design by Resteral, published on GitHub. It is a board, with 42 components from 29 distinct parts.

Its main chip is the C2913202, from the ESP32 family. Other key parts include the C2924151, C24112, C110291, C83190 and C112260. By type, the board carries 13 capacitors, 10 resistors, 8 ICs, 3 connectors, 3 switches and 2 inductors.

It belongs with the audio, wearables and power & battery designs in this gallery.

From the project

This is the screenless, cellular-enabled version of the kids AI tracker. You can import these files directly into EasyEDA to continue routing your PCB for JLCPCB fabrication.

This is the screenless, cellular-enabled version of the kids AI tracker. You can import these files directly into EasyEDA to continue routing your PCB for JLCPCB fabrication.

📡 Cellular (SIM7080G) - UART: TXD ➡️ GPIO 17 RXD ➡️ GPIO 18 * PWRKEY ➡️ GPIO 4

📍 GPS (MAX-M10S) & 🏃 Motion (MPU-6050) & ❤️ Health (MAX30102) - I2C: (These all share the same two I2C lines) SDA ➡️ GPIO 21 SCL ➡️ GPIO 22

Main components on the Watch

C2913202C2924151C24112C110291C83190C112260C16581C190772

Watch bill of materials (BOM)

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

QtyPartRefs
1
C2913202
ESP32-S3-WROOM-1
U1
1
C2924151
CST816S
U3
1
C24112
MPU-6050
U4
1
C110291
MAX30102
U5
1
C83190
MAX98357A
U6
1
C112260
INMP441
U7
1
C16581
TP4056
U8
1
C190772
IP5306
U9
1
Vibe_Motor_Coin
M1
1
USB_C_Charging
J1
1
JST1.25_2pin_BAT
J2
1
FPC_20pin_Display
J3
1
LiPo_400mAh_3.7V
BT1
1
BTN_UP
SW1
1
BTN_DOWN
SW2
1
BOOT_BTN
SW3
1
RGB_LED_WS2812B
LED1
1
600R@100MHz
FB1
1
3.3uH
L1
3
10uF
C1, C5, C10
Show 9 more
QtyPartRefs
9
100nF
C2, C4, C6, C7, C8, C9, C11, C12 +1
1
100uF
C3
2
5.1k
R1, R2
1
2k
R3
1
10R
R4
2
4.7k
R5, R6
2
10k
R7, R8
1
1k
R9
1
33R
R10

Watch design files

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

Watch: common questions

What microcontroller does the Watch use?

The Watch is built around the C2913202, from the ESP32 family.

How many components are on the Watch?

42 components, from 29 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 Watch design files?

From the Resteral/Watch repository on GitHub, which has the schematic and the BOM; the links under Design files point to each one.

Can I use the Watch design in my own project?

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

Can I test firmware for the Watch 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.

Similar boards