In the movies you might have seen those devices spys place to sniff a computers network connection by sitting in the middle of their ethernet connection. I thought this would be cool to do and it turned out to be super easy to do with the right commands on a raspberry pi. There are also some awesome very practical uses for something so low cost and cheap to run like this.
My internet went out the other day, and while I could just use my laptop over a mobile hotspot, I kinda just felt like using my desktop. So, since my desktop doesn’t have wifi, and I wanted to take the challenge, I decided to try getting an Ethernet connection over the 4G hotspot. The idea was this, essentially extending a wifi network to Ethernet:
I decided to learn about 8 bit shift registers, digital multiplexing, pulse width modulation, and more all while building an LED array with my raspberry pi. In the end it works great and I learned so much. Below I have some pictures of the project.