This will be my third year participating in science fair. So far, I’ve won at the school and district and I’ve won medals at the county science fair the first two times. This will be the first year that I can go to the state science fair! “What should I do for my science fair project?” I wondered to myself. I’d love to use my Raspberry Pi! My dad showed me a “Sound Pressure Meter” that he has to measure how loud sounds are. I wish I could turn my RPi into one of those and enter it into the Computer Science and Mathematics category.
I have a couple of USB microphones, but I don’t know how to connect to USB in Python. So, I could connect a small microphone to the GPIO pins, but I think I’d need an analog to digital converter to do that. I’d like to light a small LED if the sound level gets too loud. Then, I can go around and test bus stops, bathrooms, school concerts, and headphones to see if they’re hurting our ears. Also, I think that once I did this, then I could replace the microphone with a digital thermometer, Geiger counter, magnetic sensor, gyroscope, and other things using very similar programming.
I just ordered my mcp3008 analog to digital converter from the Adafruit store (https://www.adafruit.com/products/856). I also snuck a wireless usb device in there too. Right now, my TV is too far away from my router to be on the internet and on graphical Linux at the same time. So, I either have to be online and ssh from the laptop to command line or connect to the TV and not have any internet access. That’s a pain! Now, I can be graphical and online at the same time! I can’t wait for them to arrive!
What advice do you have for me as I work on my project? What tutorials do you recommend?