Designing : Temperature board

I took the exemple that was on Neil's page and redesigned it on Eagle:

Using the fab library made it easy to find each component, and using the auto-router option in Eagle made me win some time:

(try to avoid 90° angles!)

Then I exported le first layer in monochrome to send it to the Fabmodules:

And the outline also:

Here are the.rml files to send to the machine:

traces

contour

After a bit of soldering and testing with a multimeter here is my temperature board:

Settings:

Tool: 10° conic

Traces: 0,4mm

Depth:0,06mm

The component you see on the side is the actual NTC resistor, it as just a resistor which value depends on the temperature.

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Programming

Settings:

OS:Ubuntu 14.4

IDE:Arduino 1.05

I am going to program the Temp Board like for the other boards, I need the archive hello.temp.45.c to generate the hex, and the makefile to build the file hello.temp.45.hex.

I already used both Arduino and the terminal to flash my boards, but since I wanted to run the Python script I did it on a terminal.

I installed Arduino (on Ubuntu there is only the 1.05 version),from the terminal:

"sudo apt-get update && sudo apt-get install arduino arduino-core"

I installed AVRDUDE and GCC from the terminal:"

sudo apt-get install gcc-avr avr-libc".

I dowloaded the files from the Fabacademy page :

hello.temp.45.c

hello.temp.45.make

hello.temp.45.py

These contain all the different codes that you need to program your board and also create a graphical interface with Python.

I then plugged my board to the FabISP (the FabISP to my computer with the USB cable) but also the FTDI cable:

Opened a terminal where I had my files: :

sudo make -f hello.temp.45.make program-usbtiny

And obtained:

Then I flashed the board :

"sudo avrdude -p t45 -c usbtiny -U flash:w:hello.temp.45.c.hex

So everything went find (for the first time!), next I wanted to have some kind of GUI to display the temperature.

To do so, I used the python script that is on a Neil's Page:

hello.temp.45.py

Before need to install the Python TK in UBUNTU enviroment, and use the correct serial port. For that we must open the terminal , as administrator and typing:

"ls /dev"

We find "ttyUSB0" (port 0) , next we can then use the python code:

"python hello.temp.45.py /dev/ttyUSB0"

I had a problem: COULD NOT FIND NUMPY-> so I installed anaconda which is supposed to have all the librairies for python. But numby wasn't installed so tried "install numpy" but apparently I needed to install "pip".

Installed pip and then numpy : "sudo apt-get install python-pip"

Maked sure I had the latest version "pip install --upgrade pip"

So first install pip and then numpy.

So i retried : "sudo python hello.temp.45.py /dev/ttyUSB0".

But I had an error about "serial" that wasn't found, so : "pip install pyserial".

I still had problems with python that could not find numpy, closed everything, tryed to uninstall numpy : "pip uninstall numpy" and reinstalled it : "pip install numpy".

This solved my "numpy" problems! I then typed : "sudo python hello.temp.45.py /dev/ttyUSB0"

Here is the victory screenshot: