I'm building a device which is designed to be built by people of varying skill and education levels. Part of it needs to climb to and maintain a temperature of 220C, but I don't need very tight regulation. Swings from 215-225C are acceptable, but not desired.
My normal goto for this is a microcontroller, thermistor, MOSFET, and heater cartridge. I know for a fact this is above my target audience's skill level. My next goto would be digital PID controllers, and those are going to be out of my budget by a significant portion.
My project has 5v & 12v available (5v would be preferred actually, saves me a 12v power supply). I've seen temperature fuses, but those seem to be one shot so as not to set fire to something. I've seen PTC thermistors, but ... I don't know how well strapping one of those to the hot part of this assembly is going to work.
Any suggestions? My ideal solution could be had from either a local B&M store, or Mouser, for $5 or less qty 1.