HardLabs

Temperature

boanjo·myhome·temp_indoor_rfm95/KiCad/temperature/temperature.kicad_pcb

Temperature PCB layout, top view — open source AVR/Arduino board by boanjo
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About the Temperature PCB

Temperature is an open source AVR/Arduino PCB design by boanjo, published on GitHub. It is a 2-layer board measuring 45.4 × 89.9 mm, with 30 components from 25 distinct parts.

Its main chip is the ATmega328P-A, from the AVR/Arduino family. Other key parts include the MCP1700x-330xxTT and RFM95W-868S2. By type, the board carries 9 capacitors, 4 resistors, 3 ICs, 3 test points, 2 transistors and 2 connectors.

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

From the project

A collection of mysensors nodes, gateways and HW from my home

The weather station is connecting 3 different sensors with water protected connections and casing. I've used a Adafruit PermaProto 1/2 sized board which works well here since it's mainly soldering of connectors we need to do and a few resistors.

The focus for this model is to protect the GX12 connections and the PCB but this with easy access. The box has plenty of room for the homemade 433MHz antenna: http://www.byvac.com/downloads/RLnn/How-to-make-a-Air-Cooled-433MHz-antenna.pdf.

Temperature, from the project README
From the project README

Main components on the Temperature

ATmega328P-AMCP1700x-330xxTTRFM95W-868S2

Temperature bill of materials (BOM)

30 components, 25 distinct parts.

QtyPartRefs
1
ATmega328P-A
U1
1
MCP1700x-330xxTT
U2
1
RFM95W-868S2
U5
2
ISS55EP06LMXTSA1
Q1, Q2
1
Crystal
Y1
1
ISP MEGA
J6
1
FTDI MEGA
J7
1
Antenna
AE1
1
Battery_Cell_3p
BT1
1
~
JP1
1
~
S1
1
RESET ATMEGA
SW3
1
3.7V
TP1
1
3.3V
TP2
1
GND
TP3
1
BLUE
D4
1
1uF
C1
1
4.7uF
C2
1
470uF
C8
4
0.1uF
C10, C11, C12, C16
Show 5 more
QtyPartRefs
2
22pF
C13, C14
1
1k
R10
1
10k
R12
1
560k
R17
1
100k
R18

Temperature design files

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

Temperature: common questions

What microcontroller does the Temperature use?

The Temperature is built around the ATmega328P-A, from the AVR/Arduino family.

How big is the Temperature PCB?

The Temperature measures 45.4 × 89.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Temperature?

30 components, from 25 distinct parts. The full bill of materials is listed on this page.

Where can I download the Temperature design files?

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

Can I use the Temperature design in my own project?

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

Can I test firmware for the Temperature 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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