GreatScottLab

I use the timers of the atmega328p in a very specific way. Seems like you are trying to compile for another board (LOLIN D32). Your board does not have the same timers so it will not work. Feel free to rewrite the timer configuration though.

Great :-)

I talked about how the sensor and code works in the video.

EasyEDA

Through the potentiometer? What? And AC mains running through all of it is also complete BS. And a capacitive dropper would have made safety even worse. Sorry but nothing what you say is correct.

Fixed

Feel free to simplify the code and post it here.

It is on my to do list

Yes

Not really. Sorry.

It was a generic 0603 SMD LED. Any should do.

No, the code is done. You don't need digitalWrite when you set up the timer correctly. That is the TCCR1A and TCCR1B part.

Properly driving the MOSFET was the design consideration.

I talked about the converter. It was a boost converter which can output 90V max and 1500W. Should be pretty easy to find with those specs on Ebay/Amazon.

Correct! I should have said that in the video. But in the video you can actually see how I did not install the beta versions but instead the latest stable version.

Sorry but the page is removed. I can not try out your code.