2 layers128 × 77 mm
4 layers36 × 36 mm
Spark
MalphasWats/Spark1A custom smart watch
- Size
- 36 × 36 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 43
- Pads
- 217
- Tracks, vias
- 626, 126
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 29 Apr 2019
- Updated
- 15 Mar 2020
Overview
Spark is an open-source printed circuit board by MalphasWats, from the MalphasWats/Spark repository on GitHub. It is a 4-layer board of 36 × 36 mm with 77 parts on 43 nets, routed with 626 tracks and 126 vias.
It is built around the ATMEGA1284P-AU and BMA280. Its parts include 60 diodes, 5 resistors, 4 capacitors, 3 switches and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA1284P-AU
TQFP-44(10x10)-40℃~+85℃ 1.8V~5.5V 10bit 128KB 16KB 20MHz 32 4KB 8 Bit AVR Built-in FLASH TQFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BMA280
LGA-12(2x2)-40℃~+85℃ 1.62V~3.6V LGA-12(2x2) Accelerometers ROHSBosch SensortecAccelerometers
README
README.mdSpark
A custom smart watch
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 60 | LED_ALT | Custom Footprints:LED_0402-Clean | D0, D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22 +44 |
| 5 | 220R | Resistor_SMD:R_0402_1005Metric | R0, R1, R2, R3, R4 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 1 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C0 |
| 1 | 32.768KHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | ATmega1284P-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U0 |
| 1 | BMA280 | Package_LGA:LGA-12_2x2mm_P0.5mm | U1 |
| 1 | Battery Pads | Battery:BatteryHolder_Keystone_3002_1x2032 | J0 |
| 1 | C_Small | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | DOWN | Button_Switch_SMD:Panasonic_EVQPUK_EVQPUB | SW3 |
| 1 | ISP-PROG-6 | Custom_Footprints:ISP_SMD | J1 |
| 1 | OK | Button_Switch_SMD:Panasonic_EVQPUK_EVQPUB | SW2 |
| 1 | UP | Button_Switch_SMD:Panasonic_EVQPUK_EVQPUB | SW1 |
Questions
How big is the Spark PCB?
It measures 36 × 36 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Spark use?
77 parts, built around the ATMEGA1284P-AU and BMA280. 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 Spark KiCad files?
From the MalphasWats/Spark repository on GitHub, at the commit this page was made from: the board is Spark.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Spark design in my own project?
Its repository states no licence, so its author keeps all rights: ask MalphasWats before reusing the design.
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