I have tested a HY-SRF05 sensor with a PIC micro LCD counter that i build a few years back.
I pulse the trigger pin of the HY SRF05 hi for 10us and then low for 1000ms and repeat on off pulses ,as i move an object away from the sensor the value of the counter increases but does not go higher than -+6000 counts (1 count is 1uS).
Now 6000/58 (ref from various web sites to calculate distance) i get 103cm.
That is the same value i get from my Atmega328p distance meter ,the sensor does not work on 3-4m as stated in the datasheet.
My question is -- Did anybody get the 3-4m distance from this sensor.(the sensor is not faulty same results on 3 sensors unless all 3 is faulty).