Milling and Soldering

  • This week’s assignment was to measure something: add a sensor to a microcontroller board that you have designed and read it

  • I went with the microphone board for this week, starting off by getting the milling part and soldering out of the way. I did the same steps I did in week 4. The soldering was very quick for the attiny was probably the most complex part.

Reading Input

  • With that done I had plenty of time to read up on how I would go by reading the signal from the board. The most straightforward way seemed to be using the terminal in linux.

  • In linux I downloaded the C file, the .make file and the .py file for my board. I put them all in the same folder on my desktop. I then plugged in my board and the programmer.

  • In the terminal I located that folder and then wrote:

    • 
sudo make -f hello.mic.45.make
sudo make -f hello.mic.45.make program-avrisp2

  • I was using the avrisp2 but if you use the fabISP you should write:

    • 
sudo make -f hello.mic.45.make
sudo make -f hello.mic.45.make program-usbtiny

  • I then disconnected the the programmer but kept the board connected to the USB.

  • Now the board is programmed and I just had to use the python code to read the input.

  • I used the command "ls /dev" to locate the USB connection to the board.

  • In my case it was called ttyUSB0.

  • Once located I typed:

    • 
 python hello.mic.45.py /dev/ttyUSB0

  • It gave me a small window reading the soundwaves the board was picking up.

  • I included input devices in my final project.