hi im a 4th year Electronics engineering student. and i need help about our project in control system. we are asked to design a railway gate control. the project description is this: the project has two modes automatic and manual, when the mode is in manual mode the controls of the railway gate are PC based. however when the automatic mode is activated, the PC controls are disabled and the railway gate control is based on the proximity sensors located near the railway. the problem is we dont know how to interface the output of the proximity sensor and the micro controller. also we dont know how to interface the PC program (visual basic GUI commands) on the micro controller. the micro controller will be used to drive a stepper motor or a servo motor to control the movement of the gate. can someone help me in this please..