Quote
Leav
So, the basic idea is to order a board like this, and power with mains voltage.
BUT! since just connecting it to mains will certainly fry it within a second or two, the idea is to use a solid state relay like this one in order to PWM the mains power.
Your mains fuses will blow within half a second (hopefully). AC isn't really PWM-able, especially no to cut down power to less than 10%.
Seeing such a calculation I wonder wether I can recommend you to play with mains power. Perhaps an industry made heating mat would be the better choice.