I am using a 0.17 amp, 12 volt cooling fan on a Peltier plate. The fan is controlled by a thermostat. On shut down, I want a delayed stop on the cooling fan. I assume that I can accomplish this with a capacitor wired in parallel with the fan. I would like it to power down for at least one minute. Am I on the right track? How do I size this capacitor? Any help would be appreciated.