few weeks before the competition

the range finder and the coding were the biggest problems we faced

in the case of range finder

The circuit was built and it was correctly after we asked our lecture  but our range finder was not working . We spent about two weeks trying to figure out what’s wrong with our circuit so we rebuilt the circuit again and  we bought a new breadboard. moreover in the case of coding we used  another piece of coding. the  problem was not solve. eventually we succeed to figure it out  by the way we were thinking. We saw that  the motor is running so there is nothing wrong with the coding or with breadbored becuse they are new. So we decided to test the range finder using the oscilloscope and it was damaged because no signals appeared on the screen.