Hello, I am wondering if anybody knows specifically how to set up a touch circuit. I have a set up here that, when you touch the wires it will send an input to a microcontroller and change the color of an led. The thing is I don't know what size capacitor, resistor, transistor to use. Is there some sort of equation or anything for setting up touch circuits? I'm also not sure how much power the microcontroller needs in order to see it as an input.

 

Here's Mchip's take on the subject: http://ww1.microchip.com/downloads/en/AppNotes/00001334B.pdf

 

Here's Mchip's take on the subject: http://ww1.microchip.com/downloads/en/AppNotes/00001334B.pdf

Oh woah. I didn't know they had this thank you so much!