The coolest thing I made is probably my two-tier, 3-kettle, 240v E-HERMS homebrewing system, but that was probably only about 15% fabrication and 85% integrating off-the-shelf hardware.
For some reason, the thing that still feels the coolest was the RC hovercraft (converted from RC airplane parts) that a friend and I made for a science fair. It was a bit silly because it wasn't cordless, but that attribute doubled as a nice safety feature given that this was being piloted in a gymnasium full of kids.
For some reason, the thing that still feels the coolest was the RC hovercraft (converted from RC airplane parts) that a friend and I made for a science fair. It was a bit silly because it wasn't cordless, but that attribute doubled as a nice safety feature given that this was being piloted in a gymnasium full of kids.