Author: Raglan’s Electric Baboon via YouTube
This is technically part 2 of ‘Hot Wire Rope Cutting’ but ended up being more about explaining PWM aka Pulse Width Modulation.
Power supply is an old PC power supply.
PWM controller is a generic 10-50V 30A motor controller. I’m in New Zealand and got mine here:
https://surplustronics.co.nz/products/6176-dc-motor-speed-control-pwm-hho-10v-50v-dc
You can probably get it from your local nerd shop or Ali E.