2 layers131.2 × 95.7 mm
Swadge S2-Devkit
AEFeinstein/Super-2023-Swadge-HW
Swadge devkit for an ESP32-S2 with all the bells and whistles
86 parts17MIT
2 layers12.1 × 36.7 mm
JLCPCB HOLIDAY PROJECT
WingTechCorner/WTC_PROJECT-XMAS-USB-ORNAMENT1A little cool XMAS project
- Size
- 12.1 × 36.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 70
- Nets
- 42
- Pads
- 191
- Tracks, vias
- 860, 102
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 Nov 2020
- Updated
- 19 Nov 2020
Overview
JLCPCB HOLIDAY PROJECT is an open-source printed circuit board by WingTechCorner, from the WingTechCorner/WTC_PROJECT-XMAS-USB-ORNAMENT repository on GitHub. It is a 2-layer board of 12.1 × 36.7 mm with 70 parts on 42 nets, routed with 860 tracks and 102 vias.
It is built around the STM32F030F4P6, CH340G and QMA7981. Its parts include 36 diodes, 14 capacitors, 10 resistors, 3 ICs and 2 crystals. It belongs with the sensors and measurement boards and the STM32 boards of this library.
Main components
3
STM32F030F4P6
TSSOP-20-40℃~+85℃ 12bit 15 16KB 2.4V~3.6V 32 Bit 48MHz 4KB ARM Cortex-M0 Built-in FLASH TSSOP-20 Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
CH340G
SOP-16-40℃~+85℃ 2Mbps 3.3V、5V USB 2.0 USB to UART SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
QMA7981
LGA-12(2x2)-40℃~+85℃ 1.71V~3.6V 14bit 1uA Accelerometer SPI、I2C X,Y,Z ±32g LGA-12(2x2) Accelerometers ROHSQSTAccelerometers
README
README.mdWing's XMAS Ornament
** ISSUE - Design Seems To produce non-working unit. Investigating... **
- Something for the holidays.
- Made using SMT/SMD components so most/all parts on one side.
- Added header pins on revrse side for adding batteries or different UART(s).
- Added USB-A PCB top to allow plugging into a laptop or computer USB port or to power with a USB-A extension cable.
JLCPCB Holiday Contest Entry
This is a project I'm also submitting to the JLCPCB.com Holiday Contest!
Hardware
Components
- CH340G USB-to-TTL interface chip
- AMS1117-3v3 linear voltage regulator
- QMA7981 IMU in I2C mode
- STM32F030F4 - Arm M0 MCU
STM32
- 12Mhz External OSC
- Boot0 - CH340G's CTS (pin 9) (pulldown via 4.7K, but can be brought HIGH by CH340G by toggling CTS)
I2C
- PA9 - I2C SCL (connects to QMA7981's SCL)
- PA10 - I2C SDA (connects to QMA7981's SDX)
- PB1 - Motion Interrupt Signal ( connects to QMA7981's INT2 )
UART
- PA2 - UART-TX (connects to CH340G's RX)
- PA3 - UART-RD (connects to CH340G's TX)
LED Driving Lines
- PA0 - A (CharliePlexed LED Lines)
- PA1 - B (CharliePlexed LED Lines)
- PA4 - C (CharliePlexed LED Lines)
- PA5 - D (CharliePlexed LED Lines)
- PA6 - E (CharliePlexed LED Lines)
- PA7 - F (CharliePlexed LED Lines)
- PA13 - G (CharliePlexed LED Lines)
- PA14 - H (CharliePlexed LED Lines)
QMA7981
- AD0 - Sets address. Routed to GND for 0. 0x12H
- INT2 - Interrupt signal output. Routed to PB1 on MCU
CH340G
- TXD - To MCU RXD
- RXD - To MCU TXD
- CTS - To MCU BOOT0 for boot mode selector
- 12Mhz External OSC
Software
Building & Installing Arduino Code
The code is setup as a platformio project. To build:
# To compile/build
pio run
# To upload (Note, assumes serial upload)
pio run --target=uploadParts
70| Qty | Value | Footprint | References |
|---|---|---|---|
| 36 | BLUE_LED | Diode_SMD:D_0603_1608Metric | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +20 |
| 8 | 200Ohms-±1%-1_8W-0805 | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
| 7 | 100nF-16V-0402 | Capacitor_SMD:C_0402_1005Metric | C1, C4, C7, C10, C13, C14, C19 |
| 4 | 12pF-50V-0402 | Capacitor_SMD:C_0402_1005Metric | C16, C17, C21, C22 |
| 3 | 1uF-25V-0402 | Capacitor_SMD:C_0402_1005Metric | C15, C18, C20 |
| 2 | 12mhz-Crystal_GND24 | Crystal:Crystal_SMD_TXC_7M-4Pin_3.2x2.5mm | Y1, Y2 |
| 2 | 4.7KOhms-±1%-1_10W-0603 | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 1 | AP1117-3v3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | CH340G | KiCad-Library-JLCPCB:SOIC-16_3.9x9.9mm_P1.27mm_JLC_ROTATED | U1 |
| 1 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | 5V-IN1 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | SERIAL1 |
| 1 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1 |
| 1 | QMA7981 | KiCad-Library-JLCPCB:LGA-12_2x2mm_P0.5mm | IMU1 |
| 1 | STM32F030F4P6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | USB_A_PCB | KiCad-Library-JLCPCB:USB-A-PCB | J1 |
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Questions
How big is the JLCPCB HOLIDAY PROJECT PCB?
It measures 12.1 × 36.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the JLCPCB HOLIDAY PROJECT use?
70 parts, built around the STM32F030F4P6, CH340G and QMA7981. 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 JLCPCB HOLIDAY PROJECT KiCad files?
From the WingTechCorner/WTC_PROJECT-XMAS-USB-ORNAMENT repository on GitHub, at the commit this page was made from: the board is Hardware/JLCPCB-HOLIDAY-PROJECT.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the JLCPCB HOLIDAY PROJECT design in my own project?
Its repository states no licence, so its author keeps all rights: ask WingTechCorner before reusing the design.