2 layers
2 layers15.5 × 0.3 mm
WristWatch
- Size
- 15.5 × 0.3 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 43
- Nets
- 25
- Pads
- 124
- Tracks, vias
- 324, 19
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 29 Jul 2018
- Updated
- 29 May 2022
Overview
Watch is an open-source printed circuit board by sulkith, from the sulkith/BCDWristWatch repository on GitHub, published under the MIT licence. It is a 2-layer board of 15.5 × 0.3 mm with 43 parts on 25 nets, routed with 324 tracks and 19 vias.
It is built around the ATMEGA328-MU and BMA456. Its parts include 16 diodes, 6 capacitors, 6 connectors, 4 resistors and 2 ICs. It belongs with the wearables boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA328-MU
VQFN-32-EP(5x5)-40℃~+85℃ 1.8V~5.5V 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Calendar function、Built-in temperature sensor、Touch function VQFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BMA456
LGA-12(2x2)-40℃~+85℃ 1.62V~3.6V 16bit 1KB 3.5uA Accelerometer SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSBosch SensortecAccelerometers
README
README.md(BCD)WristWatch
Read the complete Story here in the Browser:
https://htmlpreview.github.io/?https://github.com/sulkith/BCDWristWatch/blob/master/Story/Story.html
Or you can download the PDF:
https://github.com/sulkith/BCDWristWatch/blob/master/Story/Story.pdf
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | LED | LEDs:LED_0603 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 6 | C | Capacitors_SMD:C_0603_HandSoldering | C1, C2, C3, C4, C5, C6 |
| 6 | Conn_01x01 | ProjectSpecific:TestPoint | J1, J2, J3, J4, J5, J6 |
| 5 | TestPoint | ProjectSpecific:TestPoint | GP, GP, GP, GP, GP |
| 4 | R | Resistors_SMD:R_0603 | R1, R2, R3, R4 |
| 2 | SW_Push | Buttons_Switches_SMD:Panasonic_EVQPUJ_EVQPUA | SW1, SW2 |
| 1 | ATMEGA328-MU | Housings_DFN_QFN:QFN-32-1EP_5x5mm_Pitch0.5mm | U1 |
| 1 | BMA456 | BMA456 | IC1 |
| 1 | Battery_Cell | ProjectSpecific:BatteryHolderCR2032 | BT1 |
| 1 | Crystal | Crystals:Crystal_SMD_2012-2pin_2.0x1.2mm_HandSoldering | Y1 |
Questions
How big is the Watch PCB?
It measures 15.5 × 0.3 mm and has 2 copper layers, 1 mm thick.
What parts does the Watch use?
43 parts, built around the ATMEGA328-MU and BMA456. 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 Watch KiCad files?
From the sulkith/BCDWristWatch repository on GitHub, at the commit this page was made from: the board is Schematics/Schematics_328P/Watch.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Watch design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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