First time using the board. tried to measure voltage using the analog inputs. Was not getting the desired result. Opened the serial monitor, when I unplugged the jumpers from the board and even with nothing plugged into the analog inputs I'm reading between 1 and 2 volts.
Anybody have an idea how to fix this ?
"Floating" pins (connected to nothing) pick up hash from the environment.
This is not a fault (well, maybe your fault).
The analogue pin returns a radom value, usually around 400.
Any resistor to ground (e.g. 10k) will stop this.
Leo..
is it necessary to use 10k value resistor ? because i connected 1k but nothing happen
Any value from 0ohm (short/wire) to >10Megohm from analogue pin to ground will return an A/D value of zero.
Check your code and wiring.
Post a picture and the code (wrapped in code tags) if you're not sure.
Leo..