On Sun, Jun 29, 2014 at 6:36 PM, Vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx> wrote: > My idea is to use an old oven heater like the picture. > With respect to the PID controller, maybe it is cheaper to do it manually, > without writing code. One option to consider -- and an advantage to going with a homebrew solution -- is to simply read a configuration file containing the temperature profile and PID tunings over over the serial port. This way you get the maximal possible control with the minimal hardware cost and minimal software development time. -p.