Detect 240V with a PIC

[The Master]

That was a joke by the way! I probs should get a fire extinguisher though with some of the things i do.

My point with 50Hz is that the PIC thinks the smoke machine is ready then not ready 100 times a second. Ive been thinking about the code for that and it should be really easy. Just a variable that counts down to 0 from whatever value (i havnt worked that out yet). If it gets to 0 then there is no power, otherwise the input will turn on again before it reaches 0 and reset the variable to its start value

[skimask]

My point with 50Hz is that the PIC thinks the smoke machine is ready then not ready 100 times a second.

Ahh...
But what if there was a capacitor across that PIC and ground along with a high-ish value resistor to bleed that charge off the capacitor?
Anything click yet?

[mackrackit]

That was a joke by the way! I probs should get a fire extinguisher though with some of the things i do.

And safety glasses. I always wear them when I write code.

My point with 50Hz is that the PIC thinks the smoke machine is ready then not ready 100 times a second. Ive been thinking about the code for that and it should be really easy. Just a variable that counts down to 0 from whatever value (i havnt worked that out yet). If it gets to 0 then there is no power, otherwise the input will turn on again before it reaches 0 and reset the variable to its start value

As skimask said

You'll probably have to put a diode inline with the PIC pin and maybe a small R/C network behind that to filter out the 50hz half-wave and get a decent reading at the PIC

Should not be a problem.