Hello All,
I wired the circuit and the exact code given on the following site.
It performs correctly, gives correct readings as long as I have Arduino connected to USB Power Supply. But the moment I connect it to 9V Battery, I get the below fixed reading.
Distance: 3247 cms
Distance:1270 Inches
The problem seems strange. Could you please help me?
Thanks,
Laram
The problem is not strange at all. In fact it is very common when someone uses a tiny 9 volt battery, or connects it to the wrong pins. Perhaps a drawing of your connections using the 9 volt battery should be supplied.
Paul
When you measure the voltage at the Arduino 5V pin where the sensor is powered from, do you get a good 5V to the sensor?
Swap 9V battery with 6xAA battery pack.
I have found that 9V batteries are often the "source" of the problem.
What kind of 9V battery do you use. Just change the power to a 9V-2A AC/DC Power Adapter with Cable will solved.Please check it.