Harish Projects

 Watch Full Making video on Youtube. //........Arduino Code......... #define buzzer 6 void setup () { pinMode ( 12 ,OUTPUT); //Trigger pinMode ( 13 ,INPUT); //EchoA pinMode ( 6 ,OUTPUT); //Buzzer } void loop () { long duration, distance; digitalWrite ( 12 ,LOW); delayMicroseconds ( 2 ); digitalWrite ( 12 ,HIGH); delayMicroseconds ( 10 ); digitalWrite ( 12 ,LOW); duration= pulseIn ( 13 ,HIGH); distance=(duration/ 2 )/ 29.1 ; if (distance < 70 )     // This is where checking the distance you can change the value {  // When the the distance below 100cm digitalWrite ( 6 ,HIGH); } else { // when greater than 100cm digitalWrite ( 6 ,LOW); } delay ( 500 ); }

... Project Diagram... Watch Full Detailed Video Part - 1 for Engine Part - 2 for Platform Buy Full Project kit  Click Here -  https://harishprojects.com/product/train-accident-prevention-2-train-in-same-track-best-science-project-kit/