Hey there! Today we are going to do most Arduino project! Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels. But we use this out of water :)
1 - 5110 screen;
2 - 1 x hc-sr04
3 - 1 x Servo Motor
4 - And of course Arduino
You can see the connections in the picture. You must connect true. This is a very hard project and we will have a lot of problem and bug. You can scan 2cm to 4m.