This project was made in the scope of Materials, Sensors and Applications course in FCT-UNL in Portugal.

It is inspired in the new automotive technology called Stop and Go where the Cars follow the front car automatically ,keeping the distance, when they are in transit.

We used an ultrasonic sensor to measure the distance and an H-bridge to control the direction of the movement for a given difference between the distance of the front object with a declared Setpoint distance.

Materials

· Arduino;

· Bread board;

· Sensor Ultrasonic (Ultrasonic Ranging Module HC - SR04);

· H-bridge SN75441

· LED, (current limiting resistance may be needed);

· Wires;

. Remote controled car;

Procedure are the following steps.

Step 1: Remove the Bodywork and the PCB From a Remote Controled Car;

In this step you should remove all the parts of the remote controled car that will not be used.

You must keep the original 4 batteries from the car and add some power supply for the arduino. Here we used a normal 9 V battery fixed with tape but it is recommended to use a 5V power bank for this application.

The wires in the last image are:

2 from DC MOTOR;

2 from the 4 batteries;

2 from the 9V Battery;