I am following this tutorial: http://diyhacking.com/arduino-lamp-dimmer/ For making a dimmer controller for a heater lamp (No light, just ceramic with a heat wire inside).
With this tutorial I can make my prototype work with a 40w lamp (light lamp) like a charm. But whenever I connect the heat lamp (100w) it fails. Arduino sends the right signal to the mosfet but this start smelling bad and can't control it. Temperature starts to get higher and higher.
I think it is because the watts this mosfet can dissipate is 74w and 100w is higher. I would want to find one for 300w at least or 500w because I would want to connect a heater lamp bigger in near future.
Can you recommend me a mosfet similar to irf830 but with better dissipation?
PD: Maybe the problem is another one. In that case, what would the solution be?