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Kicad Smart Watch

AFLProjects·DIY-Smart-Watch·Hardware/Kicad Project/Kicad_Smart_Watch/Kicad_Smart_Watch.kicad_pcb

Kicad Smart Watch PCB layout, top view — open source AVR/Arduino board by AFLProjects
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About the Kicad Smart Watch PCB

Kicad Smart Watch is an open source AVR/Arduino PCB design by AFLProjects, published on GitHub. It is a 2-layer board measuring 36.4 × 29.4 mm, with 48 components from 36 distinct parts.

Its main chip is the ATMEGA32U4QFN, from the AVR/Arduino family. Other key parts include the DS3231M, USB-AB and TPS62840DLCR. By type, the board carries 18 resistors, 15 capacitors, 6 diodes, 4 ICs, 2 transistors and 1 crystal.

It belongs with the wearables and displays & leds designs in this gallery.

From the project

DIY Smart Watch with ATMEGA32U4 , ST7789 SPI display and RV3028-C7 Extreme Low Power RTC Module

The project is an MCU based smartwatch. The MCU which is used is the ATMEGA32U4. The whole project is powered with the 3.7V 380mAh LQ-S1 lithium battery. I am also using an TFT 240 x 240 IPS ST7789 display with SPI. And the RV-3028-C7 Extreme Low Power RTC Module with I2C. In future revisions, an accelerometer will be added.

Kicad Smart Watch, from the project README
From the project README

Main components on the Kicad Smart Watch

DS3231MUSB-ABTPS62840DLCRATMEGA32U4QFN

Kicad Smart Watch bill of materials (BOM)

48 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
DS3231M
RV-3028-C7
U1
1
USB-AB
U3
1
TPS62840DLCR
U4
1
ATMEGA32U4QFN
U5
1
MMBT3904
Q1
1
MCP73831_2
Q2
1
16MHZ
16MHz
Y1
1
FPC
J3
1
C8598
D_Schottky
D1
1
C2296
Green
D2
1
C2296
Yellow
D3
1
C2296
PRTR5V0U2X,215
D4
1
D_Schottky
D5
1
LED
D6
1
2.2uH
L1
1
100nF
C2
1
1UF
4.7uF
C3
1
0.1UF
4.7uF
C4
2
22PF
22pF
C5, C6
3
1UF
1uF
C7, C11, C12
Show 16 more
QtyPartRefs
1
100NF
100pF
C9
1
0.1UF
0.1uF
C10
3
100pF
C14, C15, C16
1
4.7uF
C17
1
10uF
C18
1
1K
R1
1
6k
R2
6
10K
R3, R4, R12, R13, R14, R15
2
22
R5, R7
2
330
R6, R11
1
10
R8
1
200
10k
R9
1
330
6k
R10
1
267k
R16
1
2k
R17
1
10k
R18

Kicad Smart Watch design files

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

Kicad Smart Watch: common questions

What microcontroller does the Kicad Smart Watch use?

The Kicad Smart Watch is built around the ATMEGA32U4QFN, from the AVR/Arduino family.

How big is the Kicad Smart Watch PCB?

The Kicad Smart Watch measures 36.4 × 29.4 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Kicad Smart Watch?

48 components, from 36 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 Kicad Smart Watch design files?

From the AFLProjects/DIY-Smart-Watch repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Kicad Smart Watch design in my own project?

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

Can I test firmware for the Kicad Smart Watch without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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