LCD Custom shield problem after using analog , 5v and ground pins on a connector

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hi all.

i trying make custom shield uses 16x2 lcd screen , input analog pin 0 facing problems , baffled.

i followin example here http://arduino.cc/en/tutorial/liquidcrystal exact same wiring , code , shield works ok behaviour in example. fyi using arduino protoshield attaches on arduino yun , using 5k ohm potenciometer.

my next  step solder 3 pin female connector has first pin directly on analog 0 , having other pin connected @ 5v pin (making shared between 5v input of screen potenciometer , female pin) , having last pin connected directly ground. since there 2 of ground pins on arduino sharing them between lcd screen , female pin.

now when trying ot power arduino, there no output on screen whatsoever, after apply bit of pressure on potensiometer (its 1 of these little screw on top ) then  have someting on screen complete garbage. note have not connected sensor female pins there no cirquit there.



the input changes each second means code running ok.

i tried severing 5v connection female pin same.

when tried change potensiometer, still had no input

any idea why might happening?

thanks in in advance

quote
my next  step solder 3 pin female connector ...
the photo shows 4-pin connector.

quote
...only after apply bit of pressure on potensiometer (its 1 of these little screw on top )  i have someting on screen complete garbage...
the potentiometer has nothing problem since appears set judging fact rectangular boxes barely perceptible on lcd screen.

the pressure on potentiometer flexing board causing contact somewhere on board open causing problem.  i suggest go , touch of solder connections.

don


Arduino Forum > Using Arduino > Displays > LCD Custom shield problem after using analog , 5v and ground pins on a connector


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