HardLabs

Promini rfm95w

13·muhradio_pcb·transmitter/lora/promini_rfm95w.kicad_pcb

Promini rfm95w PCB layout, top view — open source AVR/Arduino board by 13

About the Promini rfm95w PCB

Promini rfm95w is an open source AVR/Arduino PCB design by 13, published on GitHub. It is a 2-layer board measuring 17.8 × 60 mm, with 9 components from 9 distinct parts.

Its main chip is the Arduino Pro Mini 3V3/8MHz, from the AVR/Arduino family. Other key parts include the RFM95W 868MHz LoRa. By type, the board carries 2 connectors, 2 capacitors, 2 resistors, 1 IC, 1 module and 1 transistor.

It belongs with the rf & radio and sensors designs in this gallery.

From the project

A 17.78 x 60 mm two-layer carrier (v1.1, LoRa) that hard-wires an Arduino Pro Mini to the HopeRF RFM95W LoRa module (16 x 16 mm, 16 castellations) for the muhradio LoRa transmitter nodes. Same board size, sensor header and battery circuit as the CC1101 carrier in ../cc1101/; only

A 17.78 x 60 mm two-layer carrier (v1.1, LoRa) that hard-wires an Arduino Pro Mini to the HopeRF RFM95W LoRa module (16 x 16 mm, 16 castellations) for the muhradio LoRa transmitter nodes. Same board size, sensor header and battery circuit as the CC1101 carrier in ../cc1101/; only the radio and its wiring differ.

See docs/DESIGN.md for the part research, the layout decision and the assembly notes.

Main components on the Promini rfm95w

RFM95W 868MHz LoRaArduino Pro Mini 3V3/8MHz

Promini rfm95w bill of materials (BOM)

9 components, 9 distinct parts.

QtyPartRefs
1
RFM95W 868MHz LoRa
U1
1
Arduino Pro Mini 3V3/8MHz
A1
1
AO3401A
Q1
1
Sensor header
J1
1
JST PH battery
J2
1
22uF
C1
1
100nF (DNP)
C2
1
4.7k (DS18B20 only)
R1
1
330R
R2

Promini rfm95w design files

The KiCad project lives in the 13/muhradio_pcb repository on GitHub; these links point at the commit this page was built from.

Promini rfm95w: common questions

What microcontroller does the Promini rfm95w use?

The Promini rfm95w is built around the Arduino Pro Mini 3V3/8MHz, from the AVR/Arduino family.

How big is the Promini rfm95w PCB?

The Promini rfm95w measures 17.8 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Promini rfm95w?

9 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Promini rfm95w design files?

From the 13/muhradio_pcb repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Promini rfm95w design in my own project?

The repository has no license, so all rights stay with 13. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Promini rfm95w without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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