2 layers56.5 × 66.8 mm
2 layers24 × 24 mm
SX1280 module
dabit20/ExpressLRS-SX1280-moduleSX1280 based 2.4GHz module for the ExpressLRS radio system
- Size
- 24 × 24 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 45
- Pads
- 144
- Tracks, vias
- 404, 35
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 1 May 2020
- Updated
- 1 May 2020
Overview
SX1280 module is an open-source printed circuit board by dabit20, from the dabit20/ExpressLRS-SX1280-module repository on GitHub. It is a 2-layer board of 24 × 24 mm with 50 parts on 45 nets, routed with 404 tracks and 35 vias.
It is built around the STM32L412KBT6, MBR0520L-TP and ASE-8.000MHZ-LC-T. Its parts include 19 resistors, 8 capacitors, 4 diodes, 2 ICs and 2 connectors. It belongs with the radio and wireless boards and the STM32 boards of this library.
Main components
3
STM32L412KBT6
LQFP-32(7x7)-40℃~+85℃ 1.71V~3.6V 128KB 26 32 Bit 40KB 80MHz ARM Cortex-M4 Built-in FLASH LQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
MBR0520L-TP
SOD-123-65℃~+125℃ 1 Independent 20V 385mV@0.5A 5.5A 500mA 75uA@20V SOD-123 Schottky Diodes ROHSMicro Commercial ComponentsSchottky Diodes
ASE-8.000MHZ-LC-T
SMD3225-4PCrystal OscillatorsAbracon
README
README.mdExpressLRS SX1280-based Rx/Tx module
This module is a first shot at creating a suitable platform for a 2.4GHz port of the ExpressLRS radio link system for model aircraft. It is based on the 20x20 M2 flight stack form factor and it uses the Chengdu EByte E28 modules, which are available in +12dBm, +20dBm and +27dBm output power. All these modules should work
This PCB can be used in the JR bay as the TX module, and on the quadcopter (or other RC aircraft) as RX module. Check the ExpressLRS project for more details.
The board has not been tested yet. Beware.
Design was done in KiCAD 5.1 Production files, PDF and artist impressions are available in the production_data/ directory
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100E | Resistor_SMD:R_0603_1608Metric | R8, R9, R11, R12, R13, R14, R16, R17, R18, R19, R20 |
| 8 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 |
| 4 | 33E | Resistor_SMD:R_0603_1608Metric | R4, R6, R7, R15 |
| 4 | MountingHole_2.2mm_M2_ISO7380 | MountingHole:MountingHole_2.2mm_M2_ISO7380 | MH1, MH1, MH2, MH2 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C5 |
| 3 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C7 |
| 2 | 0.12E | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R5 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric | C6, C8 |
| 2 | MBR0520LT | Diode_SMD:D_SOD-123 | D1, D2 |
| 1 | 742792601 | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | ASE-8.000MHZ-LC-T | Oscillator:Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | X1 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.00mm:PinHeader_1x04_P2.00mm_Vertical | J1 |
| 1 | Ebyte_E28-2G4MxxS | SX1280_module:E28-2G4MxxS | M1 |
| 1 | GRN | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | LP38692MPX-3.3_NOPB | Package_TO_SOT_SMD:SOT-223-5 | U1 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | STM32L412KBT6 | Package_QFP:LQFP-32_7x7mm_P0.8mm | U2 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Wuerth_614105150721_Vertical_CircularHoles | J2 |
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Questions
How big is the SX1280 module PCB?
It measures 24 × 24 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SX1280 module use?
50 parts, built around the STM32L412KBT6, MBR0520L-TP and ASE-8.000MHZ-LC-T. 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 SX1280 module KiCad files?
From the dabit20/ExpressLRS-SX1280-module repository on GitHub, at the commit this page was made from: the board is SX1280_module.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the SX1280 module design in my own project?
Its repository states no licence, so its author keeps all rights: ask dabit20 before reusing the design.