Did you measure the variation of the voltage of the trimpot (3rd pin hole) when turning it from one end to the other?
Any change when in the voltage with the resistor?
Is the 2nd pin hole really at 5V, as mine is?
Have you checked that there is no short to ground?
Any change when in the voltage with the resistor?
Is the 2nd pin hole really at 5V, as mine is?
Have you checked that there is no short to ground?