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You are here: Home / Replies / there are 2 control pins in

there are 2 control pins in

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Microcontroller › 8051 › HC-SR04 with 8051 › there are 2 control pins in

October 24, 2014 at 6:03 pm #12316
Ashutosh Bhatt
Participant

there are 2 control pins in this sensor

1) echo

2) trig

 

trig is an input pin and echo pin is an output from sensor

a high pulse input is given to trig pin

then we have to wait for echo output from sensor

if there is any obstacle in sensor range then there is echo output from sensor otherwise no output

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