Abhinav Rathi Profile Topics Started Replies Created Engagements Search replies: Forum Replies Created Viewing 1 post (of 1 total) Author Posts February 1, 2011 at 3:18 pm in reply to: Automatic railway gate #5390 Abhinav RathiParticipant thanks for your reply i checked the circuit of RF based wireless communication on this site. it seems useful Can I use LASER istead of RF module? Author Posts Viewing 1 post (of 1 total)