What does this symbol represents of?

Hello,

I am going to try this project (look at the schematic I have attached please). But, I really don't know what this curve (the symbol that I am pointing I don't know). So, what this curve/symbol represents of?

I put red circles at the symbol I am pointing.

Please help.

thank you

That's a "not a connection". It means the lines on the drawing cross, but there is no electrical connection of the lines.

It shows a wire jumping over another wire.

I use a slightly different way of showing the same thing.

That is a way to indicate that the wires do not connect to each other. It is more common to place a dot where the wires do connect (you can see connection dots in several places), and not bother with the visual representation of one wire jumping over the other.

THANK Ya!!!

That is the (slightly) older way of showing "no connection." Nowadays, we generally see

for connected, and

for not connected. It is important to know all these variations.
Der Strom

I prefer to use both the dots where there is a connection, as well as a jump when there is none, just to help prevent confusion (mainly of myself).

I like the loops since many copy machines will blur to the point your not sure whether it is a dot or not.

BillB3857 said:

I like the loops since many copy machines will blur to the point your not sure whether it is a dot or not.

Click to expand...

Loops will be better because it is so much easier to recognize a loop than a dot if your schematic is very complicated.

I like loops in hand drawn schematics but in computer drawn schematics they take more time (you have to add a loop symbol), and on complex schematics loops take up space and look messy.