I made line tracer's cencer system and attaced moniter on the motherboard.

I completed Line tracer's cencer system. Look at the left picture on the top. This is a sencer to line tracer be look at objects. It took me 2 hours
to complete it. it was very tired. But I was very happy to this sencer system work without problems.

And I attached a monitor thet I can confirm line tracer's position.
To confirm its condition, I have to do programming. But I have a littele experience to do programming, so I have to challenge to overcome this difficulties.