This was a fun electronics project that I did a few years ago. I hacked an old Nintendo NES R.O.B Robot to be controllable from a PC via a webpage (I ended up selling the robot to someone who wanted to use it in a commercial).
I used a Teensy micro-controller soldered to the robot’s original circuit board and a bit of code to interpret serial input. Then I made a PHP file that sends serial data to the Teensy’s port and made a gui with a bit of Bootstrap. Here is the code if you’d like to try this yourself: R.O.B. Robot Controller
