BLDC Motor based Dynamometer - Voltage Spikes!

I'm building a dyno based on a BLDC motor from an electric car.
This is my second video trying to get the electronics working. Check out how I blow things us, fix them and ultimately make progress to a working BLDC based Dyno!
Check out my first attempt:
• BLDC Motor based Dynom...

[@Andrewlstewart]

That's a huge resistor 😁. Awesome progress 💪

[@mandrakejake]

ah so you didn't fit optoisolators like I suggested and found out the hard way .. 😀