2 layers43.7 × 27.9 mm
2 layers110.5 × 27.9 mm
CaLoRa
c-hack/CaLoRa-Node1LoRaWAN node for lowest power consumption on a battery
- Size
- 110.5 × 27.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 42
- Pads
- 136
- Tracks, vias
- 608, 58
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 28 Aug 2020
- Updated
- 14 Mar 2021
Overview
CaLoRa is an open-source printed circuit board by c-hack, from the c-hack/CaLoRa-Node repository on GitHub. It is a 2-layer board of 110.5 × 27.9 mm with 38 parts on 42 nets, routed with 608 tracks and 58 vias.
It is built around the ATMEGA328-AU, DS1337C# and RFM95W-868S2. Its parts include 12 connectors, 7 resistors, 5 capacitors, 3 ICs and 2 crystals. It belongs with the power and radio and wireless boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
DS1337C#
SOIC-16-300mil-40℃~+85℃ 1.8V~5.5V 150uA 425nA Built-in I2C Programmable clock output、Alarm function SOIC-16-300mil Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
RFM95W-868S2
16-SMD16-SMD New Arrivals ROHSHopeRF Micro-electronicsUncategorised
README
Readme.mdCaLoRa-Node
c-hack.de and surasto.de 2020
This LoRaWAN node is designed to run for long time on a battery. It uses an external RTC (DS1337) with alarm function to enable or disable the complete power supply by switching a P-MOS FET. This is the deepest sleep possible.
It uses an Atmel ATMega328 with the Arduino-UNO bootloader. The LoRAWAN is implemented with an HopeRF RFM95W module. The board implements some grove compatible connectors wuth I2C and analog inputs of the MCU.
We use the lmic software library for now but will add a wrapper to make it simpler.
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R3, R4, R5 |
| 4 | Conn_01x04_Male | Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J9, J10, J11, J12 |
| 3 | 100n | Capacitor_SMD:C_1210_3225Metric_Pad1.42x2.65mm_HandSolder | C4, C5, C6 |
| 3 | Screw_Terminal_01x01 | Connector_Pin:Pin_D1.0mm_L10.0mm_LooseFit | J3, J7, J8 |
| 2 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R6, R7 |
| 2 | 22p | Capacitor_SMD:C_1210_3225Metric_Pad1.42x2.65mm_HandSolder | C2, C3 |
| 2 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4, J5 |
| 2 | Jumper | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP2, JP3 |
| 1 | 16MHz | Crystal:Crystal_SMD_7050-2Pin_7.0x5.0mm_HandSoldering | Y2 |
| 1 | 22k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R2 |
| 1 | 32kHz | Crystal:Crystal_DS26_D2.0mm_L6.0mm_Horizontal_1EP_style2 | Y3 |
| 1 | ATmega328-AU | Package_QFP:TQFP-32_7x7mm_P0.8mm | U2 |
| 1 | AVR-ISP-6 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J6 |
| 1 | Conn_01x01_Male | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J2 |
| 1 | Conn_01x06_Male | KiCAD-Ralf:TestPoint_Pad_6x1.5x4.0mm | J1 |
| 1 | DS1337 | Package_SO:SO-8_5.3x6.2mm_P1.27mm | U3 |
| 1 | Q_PMOS_GSD | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1 |
| 1 | RFM95W-868S2 | RF_Module:HOPERF_RFM9XW_SMD | U4 |
| 1 | SW_Push_Dual | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW2 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP4 |
The 34 most common of 38 parts.
Questions
How big is the CaLoRa PCB?
It measures 110.5 × 27.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the CaLoRa use?
38 parts, built around the ATMEGA328-AU, DS1337C# 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 CaLoRa KiCad files?
From the c-hack/CaLoRa-Node repository on GitHub, at the commit this page was made from: the board is KiCAD-V1-FINAL/CaLoRa.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the CaLoRa design in my own project?
Its repository states no licence, so its author keeps all rights: ask c-hack before reusing the design.
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