I will make an arduino program for the railway latch. but I have difficulties I am still confused with the program for its ultrasonic sensors when the portal closes, but the train has not passed, I'm worried the portal will reopen how to program the ultrasonic sensors so that when the bar closes…

ultrasonic sensors for railway bars

gfvalvo April 27, 2018, 11:14am 3

God, I hope he/she is talking about model trains and not ones carrying PEOPLE

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