Newbie to the node red programming and working through it pretty well. I am wanting to create a reptile environment control system using a Robotdyn AC dimmer. I was wondering if anyone has used this or a similar hardware product. I want to use it to adjust the voltage and dim ceramic heat lamps to sustain a constant temp. My questions is if anyone has created a node that can adjust a PWM with zero point. I have no knowledge of creating nodes just using them.