A few weeks ago I made a chicken egg incubator with some scrap wood, a light bulb, and water heater thermostat. It worked, just not as nice as I wanted, I was in a rush.
I have been researching/designing a avr controllable incubator. No real need just a want and a challenge.
I am roadblocked at figuring out the heating element. I was thinking of using a PID controller to vary a PWM signal to a solid state relay that switches a 100-250 watt AC heating element.
I know I can use a PID controller to vary a PWM signal. I know I can switch the element on and off with a SSR. What I don't know is if I can use them together.
Would a DC to AC SSR chop the AC sine wave properly?
Is there a better approach?