2 layers50 × 50 mm
Open Battery Charger
DavidVeloz95/Open-Source-Battery-Smart-Charger
Embedded power electronics project: intelligent 2S Li-Ion charger with protection, power switching and monitoring, designed in KiCad.
47 partsMIT
4 layers100 × 50 mm
Lo cate pcb
pkwill01/lo-cate- Size
- 100 × 50 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 58
- Nets
- 83
- Pads
- 233
- Tracks, vias
- 398, 73
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 19 Jun 2024
- Updated
- 23 Jul 2024
Overview
Lo cate pcb is an open-source printed circuit board by pkwill01, from the pkwill01/lo-cate repository on GitHub. It is a 4-layer board of 100 × 50 mm with 58 parts on 83 nets, routed with 398 tracks and 73 vias.
It is built around the BMI323, LDK320AM33R and RFM95W-868S2. Its parts include 19 capacitors, 14 resistors, 8 ICs, 5 switches and 2 connectors. It belongs with the STM32 boards of this library.
Main components
3
BMI323
LGA-14-40℃~+85℃ IMU (accelerometer + gyroscope) Motion event detection LGA-14 Accelerometers ROHSBosch SensortecAccelerometers
LDK320AM33R
SOT-23-5-40℃~+125℃@(Tj) 1 100mV@(100mA) 18V 200mA 3.3V 60uA 63uVrms 88dB@(120Hz) Fixed Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
RFM95W-868S2
16-SMD16-SMD New Arrivals ROHSHopeRF Micro-electronicsUncategorised
README
README.mdlo-cate
A PCB and firmware project to create a simple LoRa capable device with an intergrated IMU.
PCB
The PCB was designed to be simple, power over USB and be manufactorable using basic electrical tooling.
Overview
- LoRa; Connected to the micro via SPI, the antenna connection is terminated to a U.FL SMD connector w/ track impedance matched to 50Ω
- IMU; Connected to micro via SPI
- Microcontroller; STM32F401RET7 w/ an 8MHz external oscillator to allow USB OTG capabilities.
- USB; Mini B for communicating between the STM and external PC, 5v in fed into a 3.3v linear reg for use by all IC's
- LED's; 3 RGB LED's connected to the micros power outputs for baic HMI
- Buttons; Debounced using RC filter and connected to interrupt capable pins on the micro, MCU WKUP is connected to the micros sleep wakeup pin
PCB TODO
- [] Change the Programming header for the STM32 from the 1.27mm pins
- [] Fix the oscillator circuit to fit into the STM32 design guidlines C19 & C18 should be calculated via C_L = 2*(C_Load - C_Stray) also R14 will need adjusting also
Firmware
Parts
58| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C16 |
| 9 | 60Ω | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R4, R5, R6, R7, R8, R9, R10 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 50k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R12, R13 |
| 2 | 10p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18, C19 |
| 1 | 0.47uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 30R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15 |
| 1 | 690-005-299-043 | footprints:EDAC_690-005-299-043 | J2 |
| 1 | 734120114 | footprints:73412-0114_MOL | U8 |
| 1 | BMI323 | footprints:BMI323_BOS-M | U2 |
| 1 | BUTTON1 | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW3 |
| 1 | BUTTON2 | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW4 |
| 1 | BUTTON3 | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW5 |
| 1 | Conn_01x09_Pin | Connector_PinSocket_1.27mm:PinSocket_1x09_P1.27mm_Vertical | J3 |
| 1 | Crystal_GND24_Small | Crystal:Crystal_SMD_7050-4Pin_7.0x5.0mm | Y1 |
| 1 | LDK320AM33R | footprints:SOT23-5L_STM-M | U7 |
| 1 | LED1 | footprints:150141M173100_WRE-M | U3 |
| 1 | LED2 | footprints:150141M173100_WRE-M | U4 |
| 1 | LED3 | footprints:150141M173100_WRE-M | U5 |
| 1 | LOGO | footprints:Logo_CADPAD_2 | G*** |
| 1 | MICRO_ON | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW2 |
| 1 | MICRO_RESET | Button_Switch_SMD:SW_SPST_PTS647_Sx38 | SW1 |
| 1 | RFM95W-868S2 | footprints:XCVR_RFM95W-868S2 | U6 |
| 1 | STM32F401RETx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | TP_IMU_MISO | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | TP_IMU_MOSI | TestPoint:TestPoint_Pad_D2.0mm | TP2 |
| 1 | TP_LORA_MISO | TestPoint:TestPoint_Pad_D2.0mm | TP3 |
| 1 | TP_LORA_MOSI | TestPoint:TestPoint_Pad_D2.0mm | TP4 |
Questions
How big is the Lo cate pcb PCB?
It measures 100 × 50 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Lo cate pcb use?
58 parts, built around the BMI323, LDK320AM33R and RFM95W-868S2. 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 Lo cate pcb KiCad files?
From the pkwill01/lo-cate repository on GitHub, at the commit this page was made from: the board is pcb/lo_cate_pcb/lo_cate_pcb.kicad_pcb and its schematic pcb/lo_cate_pcb/lo_cate_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lo cate pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask pkwill01 before reusing the design.
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