Automatic gate opener

hey everyone.. i just wanna ask if somebody know how to make an auto-gate opener. My professor ask our group to make a prototype university wherein, the gate will open automatically. I've seen those recent post but the circuit i think is for the car. How about if the circuit is for the gate.. Do you get my point? My professor mentioned about proximity sensor something and i don't get it. He even mention bar codes in the car. Can you help me guys?

Thank you in advance. Hope somebody got the answer.. anyway.. please post the schematic diagram too..

I'll be forever grateful!

They are normally simple IR beam breakers, you drive your car towards the gate (breaking the beam) and the gate opens for you.

oh! you mean beam breakers is the one that is connected in the gate?

jenicadenice said:

oh! you mean beam breakers is the one that is connected in the gate?

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Yes, normally there will be a keypad (or R/C) on the outside, and beam breakers on the inside.

thank you! you just gave me an idea.. this forum is such a great site