This is an arduino code, created for an electronic project "Automatic Railway Gate Controller" done by me & some of my classmates as our Project for a course. The detail video is here : https://youtu.be/gEsIEVdwU7Q Presentation slide : http:https://goo.gl/h8Y5Z4
Some Tips :
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Before writing code for your project, conncect the all circuits & define them clearly.
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Don't think, don't think about the 2 ways 1st time. At first, only think that the train will always come from one direction.Just forget the other direction.
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Now, you have two sensors. one is for sensing that the train is coming & the other is for sensing that the train has passed the gate.
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Let call the 1st & 2nd Sensors S1 & S2 respectively. S1 will signal of the coming of the train, S2 will signal the passing of the
train. -
Now, it's easier to think, right? And I hope you've almost design the logic for one way. If not, think more.
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If you discovered the logic, congrats :) . You're done with the one way implementation. Go for the 2 way implementation now.
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Just look for the signal from S1 sensor, if you get it just colse the gate (turn on the motor for 250+ ms)& turn on the buzzer & when
you get signal from sensor S2, open the gate & turn of the buzzer. That's it for one way implementation.
==> Two way implementation.
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Now, we have 2 sensors S1 & S2.
=> If you get signal from S1, check that if S2 is already been triggered. If so, the train is passing the gate, otherwise it's just coming.
=> Follow the above logic for the reverse direction.
==>> That's it =D . Advance congratulation for your successful project :)