4 layers39 × 80 mm
Flight computer
rice-eclipse/flight-computer
Custom STM32-Based flight computer to gather data from IMUs, altimeters, and GPS, and control in-flight pyrotechnic events.
153 parts2
2 layers61.9 × 36.8 mm
TheXeric
nikolasbtks/TheXeric-PCBAn open-source hardware design, built using KiCad, based on ATmega-4809 microcontroller.
- Size
- 61.9 × 36.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 79
- Pads
- 229
- Tracks, vias
- 643, 66
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 14 Nov 2024
- Updated
- 16 Dec 2024
Overview
TheXeric is an open-source printed circuit board by nikolasbtks, from the nikolasbtks/TheXeric-PCB repository on GitHub. It is a 2-layer board of 61.9 × 36.8 mm with 54 parts on 79 nets, routed with 643 tracks and 66 vias.
It is built around the ATMEGA4809-AF, LM3670MF-1.8 and AT24CS32-STUM-T, with the USBLC6-2SC6 among its other parts. Its parts include 15 resistors, 12 capacitors, 9 connectors, 6 ICs and 5 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATMEGA4809-AF
TQFP-48(7x7)-40℃~+125℃ 1.8V~5.5V 10bit 20MHz 256Byte 41 48KB 6KB 8 Bit AVR Built-in FLASH TQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM3670MF-1.8
SOT-23-5-40℃~+85℃@(TA) 1 1.8V 15uA 1MHz 2.5V~5.5V 350mA Buck Buck Built-in Fixed Yes SOT-23-5 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersAT24CS32-STUM-T
SOT-23-5-40℃~+85℃ 1,000,000 cycles 1.7V~5.5V 100 Years 1MHz 32Kbit 5ms Hardware write protection function、Noise suppression function I2C SOT-23-5 EEPROM ROHSMicrochip TechnologyEEPROM
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
README.mdTheXeric-PCB
Description
This project demonstrates a custom 2-layer PCB containing the ATmega-4809 microcontroller. This board can be used for embedded development applications using multiple peripherals.
Components
-
Microcontroller: ATmega4809
- 6 KB SRAM and 48 MB Flash
- 20 MHz clock speed
-
USB Connectivity:
- USB Type-C for data and power
- USBLC6-2SC6 for ESD protection
-
Power Supply: LM3670MF-3.3
- Voltage regulator for stable 3.3V output
-
Headers:
- UPDI header for debugging
- GPIO, I2C, SPI and USART headers for external connections
-
Memory: AT24CS32-STUM
- 32 Kbit of EEPROM storage
- Non-volatile memory storage expansion
-
Sensor: TC1047xNB
- Analog voltage output, propotional to temperature
Disclaimer
This project is currently in testing phase. The provided documentation is shared for prototyping and learning purposes. If you choose to manufacture and use the board, please proceed with care, as it has not yet been fully validated.
Schematic and PCB Design
The board was designed using KiCad. Files from the PCB design can be found in the hardware folder for board manufacture. This folder includes:
- PCB Schematic
- PCB Layout
- Gerber files
- Assembly files
Below is a 3D render of the PCB design:
How to Use
-
Power the board
- Use a USB Type-C cable to power the board.
-
Microcontroller Programming:
- Use Arduino IDE or any other platform to program the microcontroller.
- Use a debugger with a UPDI header.
-
Peripheral Access
- Use the GPIO, I2C, SPI and USART headers to connect peripherals.
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2, J3, J5, J6, J7, J8 |
| 5 | 100R | Resistor_SMD:R_0603_1608Metric | R3, R4, R5, R6, R8 |
| 5 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3, D4, D6 |
| 4 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C4, C7, C12 |
| 4 | 1k5 | Resistor_SMD:R_0402_1005Metric | R12, R13, R14, R15 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 1μF | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 22pF | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R10, R11 |
| 2 | 4.7μF | Capacitor_SMD:C_0603_1608Metric | C5, C8 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R7, R9 |
| 2 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4, J9 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_B3U-1000P | SW2, SW3 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 10μF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 10μF | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | 12MHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 500mA | Fuse:Fuse_0402_1005Metric | F1 |
| 1 | AT24CS32-STUM | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | ATmega4809-A | Package_QFP:TQFP-48_7x7mm_P0.5mm | U2 |
| 1 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | LM3670MF | Package_TO_SOT_SMD:TSOT-23-5 | U6 |
| 1 | MCP2210x-MQ | Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm | U5 |
| 1 | SW_SPDT_312 | Button_Switch_SMD:SW_SPDT_PCM12 | SW1 |
| 1 | TC1047xNB | Package_TO_SOT_SMD:SOT-23 | U3 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
Questions
How big is the TheXeric PCB?
It measures 61.9 × 36.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TheXeric use?
54 parts, built around the ATMEGA4809-AF, LM3670MF-1.8, AT24CS32-STUM-T and USBLC6-2SC6. 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 TheXeric KiCad files?
From the nikolasbtks/TheXeric-PCB repository on GitHub, at the commit this page was made from: the board is hardware/TheXeric.kicad_pcb and its schematic hardware/TheXeric.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TheXeric design in my own project?
Its repository states no licence, so its author keeps all rights: ask nikolasbtks before reusing the design.
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