2 layers33.8 × 46 mm
2 layers38 × 60 mm
Crossometer mini
fredszaq/crossometer-mini2Design files for crossometer-mini device
- Size
- 38 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 63
- Pads
- 252
- Tracks, vias
- 565, 93
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 8 Aug 2022
- Updated
- 26 Aug 2024
Overview
Crossometer mini is an open-source printed circuit board by fredszaq, from the fredszaq/crossometer-mini repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 38 × 60 mm with 63 parts on 63 nets, routed with 565 tracks and 93 vias.
It is built around the CH340C, ESP32-WROOM-32 and BMP280, with the LSM6DS3TR-C, ME6211C33M5G-N and B5819W among its other parts. Its parts include 23 resistors, 14 capacitors, 6 ICs, 6 connectors and 3 transistors. It belongs with the ESP32 boards of this library.
Main components
8
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
BMP280
LGA-8(2x2.5)-40℃~+85℃ 0.12hpa 1.5pa/K 1.71V~3.6V 1hpa 300nA 30Kpa~1.1bar I2C、SPI Integrated ADC and digital interface、On-chip calibration and non-volatile storage、Standby mode、On-chip temperature output LGA-8(2x2.5) Pressure Sensors ROHSBoschPressure Sensors
LSM6DS3TR-C
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 3uA 4KB IMU (accelerometer + gyroscope) SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps 运动事件检测、同步与时间戳 LGA-14(2.5x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
ME6211C33M5G-N
SOT-23-5-40℃~+150℃ 1 120mV@(100mA) 3.3V 500mA 50uVrms 60uA 6V 70dB@(1kHz) Fixed Over Current Protection、Enable、Short Circuit Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
CJ2301
SOT-23-55℃~+150℃ 1 P-Channel 142mΩ@2.5V 1V 2.3A 20V 400mW 405pF 55pF 75pF P-Channel SOT-23 MOSFETs ROHSJiangsu Changjing Electronics Technology (CJ)MOSFETs
UMH3N
SOT-363-55℃~+150℃ 0.5uA 100 100mA 150mW 2 NPN (Pre-Biased) 250MHz 300mV 50V 5V 6.11kΩ NPN SOT-363 Digital Transistors ROHSJiangsu Changjing Electronics Technology (CJ)Digital Transistors
README
README.mdcrossometer-mini
This repo contains the design files for the crossometer-mini device, an open hardware GPS/altimeter/variometer using the crossometer-firmware.
Provided are the Kicad files for the PCB and the Freecad files for the enclosure and clip.
Taking a look at open issues may be a good idea if you intent do build a crossometer-mini for yourself.
Have a look at the releases page to get gerber files and STLs.
crossometer-mini is licenced under the CERN Open Hardware Licence Version 2 - Strongly Reciprocal
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2, R3, R4, R6, R7, R8, R9, R10, R14, R15, R16, R17 |
| 9 | 100k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R11, R12, R13, R18, R19, R20, R21, R22, R23 |
| 9 | 100nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C3, C4, C5, C6, C8, C11, C13, C14 |
| 4 | 1µF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C7, C9, C10 |
| 3 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5_ISO7380_Pad | H1, H2, H3 |
| 2 | 2k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1, R5 |
| 1 | 10µF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C12 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | AUX | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | B5819W | Diode_SMD:D_SOD-123 | D2 |
| 1 | BAT | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J2 |
| 1 | BMP280 | Package_LGA:Bosch_LGA-8_2x2.5mm_P0.65mm_ClockwisePinNumbering | U1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U6 |
| 1 | CJ2301 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U4 |
| 1 | IO0 | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | I²C | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | I²C1 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP2 |
| 1 | I²C2 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm_NumberLabels | JP1 |
| 1 | LED | LED_SMD:LED_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D1 |
| 1 | LSM6DS3TR-C | Package_LGA:Bosch_LGA-14_3x2.5mm_P0.5mm | U3 |
| 1 | ME6211C33M5G-N | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U5 |
| 1 | Micro_SD_Card_Det | Connector_Card:microSD_HC_Molex_104031-0811 | J6 |
| 1 | POWER_SWITCH | Button_Switch_SMD:SW_SPDT_PCM12 | SW2 |
| 1 | RESET | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW3 |
| 1 | TP4054-42 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U2 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | UMH3N | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q3 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J5 |
Questions
How big is the Crossometer mini PCB?
It measures 38 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Crossometer mini use?
63 parts, built around the CH340C, ESP32-WROOM-32, BMP280 and LSM6DS3TR-C. 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 Crossometer mini KiCad files?
From the fredszaq/crossometer-mini repository on GitHub, at the commit this page was made from: the board is crossometer-mini.kicad_pcb and its schematic crossometer-mini.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Crossometer mini design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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