kode

oh good lord I feel liked an idiot. Thank you. :)

actually, I was looking at the small one at the top left. it looks like a tail; above the input2 terminal circle and the connection is after the switch S1.

there is a line and circle just after "S1 switch" on input 2 that tells me it is some kind of wire and device. What is it? Is it a ground? Thank you.