4 layers31.1 × 26 mm
Kicad Smart Watch old
AFLProjects/DIY-Smart-Watch
DIY Smart Watch with ATMEGA32U4 , ST7789 SPI display and RV3028-C7 Extreme Low Power RTC Module
51 parts12
2 layers36.4 × 29.4 mm
Kicad Smart Watch
AFLProjects/DIY-Smart-Watch12DIY Smart Watch with ATMEGA32U4 , ST7789 SPI display and RV3028-C7 Extreme Low Power RTC Module
- Size
- 36.4 × 29.4 mm
- Copper layers
- 2
- Thickness
- 1.2 mm
- Parts
- 63
- Nets
- 56
- Pads
- 199
- Tracks, vias
- 778, 53
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Oct 2020
- Updated
- 21 Jan 2022
Overview
Kicad Smart Watch is an open-source printed circuit board by AFLProjects, from the AFLProjects/DIY-Smart-Watch repository on GitHub. It is a 2-layer board of 36.4 × 29.4 mm with 63 parts on 56 nets, routed with 778 tracks and 53 vias.
It is built around the TPS62840DLCR, RV-3028-C7 and MMBT3904, with the PRTR5V0U2X,215 among its other parts. Its parts include 18 resistors, 15 capacitors, 6 diodes, 4 ICs and 4 switches. It belongs with the wearables and lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
4
TPS62840DLCR
VSON-8(1.5x2)-40℃~+125℃@(TJ) 1 1.8MHz 1.8V~3.3V 1.8V~6.5V 60nA 750mA Adjustable Buck Built-in Overcurrent Protection、Light load efficient mode、Output discharge、Cycle-by-cycle current limiting Step-down type Yes VSON-8(1.5x2) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
RV-3028-C7
DFN-8(1.5x3.2)DFN-8(1.5x3.2) Real Time Clocks ROHSMicro CrystalReal Time Clocks
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
PRTR5V0U2X,215
-UncategorisedNXP Semiconductors
README
README.md
Project Overview
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.
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10k | Downloads:0603 | R4, R9, R12, R13, R14, R15, R18 |
| 7 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | GND, TP1, TP2, TP3, TP4, TP5, VCC |
| 4 | 100pF | Downloads:0603 | C9, C14, C15, C16 |
| 4 | SW_Push | Downloads:1X02 | SW1, SW2, SW3, SW4 |
| 3 | 1uF | Downloads:0603 | C7, C11, C12 |
| 3 | 4.7uF | Downloads:0603 | C3, C4, C17 |
| 2 | 22 | Downloads:0603 | R5, R7 |
| 2 | 22pF | Downloads:0603 | C5, C6 |
| 2 | 330 | Downloads:0603 | R6, R11 |
| 2 | 6k | Downloads:0603 | R2, R10 |
| 2 | D_Schottky | Downloads:0603 | D1, D5 |
| 1 | 0.1uF | Downloads:0603 | C10 |
| 1 | 10 | Downloads:0603 | R8 |
| 1 | 100nF | Downloads:0603 | C2 |
| 1 | 10K | Downloads:0603 | R3 |
| 1 | 10uF | Downloads:0603 | C18 |
| 1 | 16MHz | Downloads:CRYSTAL-SMD-5X3.2-4PAD | Y1 |
| 1 | 1K | Downloads:0603 | R1 |
| 1 | 2.2uH | Downloads:0603 | L1 |
| 1 | 267k | Downloads:0603 | R16 |
| 1 | 2k | Downloads:0603 | R17 |
| 1 | ATMEGA32U4QFN | Downloads:QFN50P700X700X100-45N | U5 |
| 1 | Conn2 | Downloads:1X02 | J1 |
| 1 | FPC | Downloads:bearlcd12pin | J3 |
| 1 | Green | Diode_SMD:D_0603_1608Metric | D2 |
| 1 | LED | Downloads:0603 | D6 |
| 1 | MCP73831_2 | Downloads:SON50P200X300X100-9N | Q2 |
| 1 | MMBT3904 | Downloads:SOT23-3 | Q1 |
| 1 | PRTR5V0U2X,215 | Downloads:SOT143B | D4 |
| 1 | RV-3028-C7 | Downloads:IC_RV-3028-C7 | U1 |
| 1 | TPS62840DLCR | Downloads:SON50P200X150X100-8N | U4 |
| 1 | USB-AB | Downloads:GCT_USB3155-XX-X_REVA | U3 |
| 1 | Yellow | Diode_SMD:D_0603_1608Metric | D3 |
The 60 most common of 63 parts.
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Questions
How big is the Kicad Smart Watch PCB?
It measures 36.4 × 29.4 mm and has 2 copper layers, 1.2 mm thick.
What parts does the Kicad Smart Watch use?
63 parts, built around the TPS62840DLCR, RV-3028-C7, MMBT3904 and PRTR5V0U2X,215. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Kicad Smart Watch KiCad files?
From the AFLProjects/DIY-Smart-Watch repository on GitHub, at the commit this page was made from: the board is Hardware/Kicad Project/Kicad_Smart_Watch/Kicad_Smart_Watch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kicad Smart Watch design in my own project?
Its repository states no licence, so its author keeps all rights: ask AFLProjects before reusing the design.