Hello good people.
First off I'm not a hardware guy, I a software developer. So please be kind in helping me understand my problem. I have a single potentiometer connected to A0, I'm using the example Read Serial. When I power the board from my computer's USB I get solid readings from the potentiometer , no variation in the value printed in theserial window. This is my external power supply.
http://www.jaycar.com.au/Power-Products ... y/p/MP3800
When I connect this power supply and supply voltage past 7.2 volts the output values from the potentiometer start to fluctuate, quite a lot, anything under this is OK. Could anyone shed some light into what's going on here?
Potentiometer giving diff values when EtherTen powered externally
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AndrewTurnerAUS
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angusgr
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Re: Potentiometer giving diff values when EtherTen powered externally
Hi Andrew,
What are each of potentiometer pins connected to? It should be (from one side to the other side) - Ground, A0, 5V. It doesn't matter if it's backwards, as long as GND is on one end and 5V is on the other end - the "wiper" of the pot will move from one end to the other.
If you've checked the wiring and it's correct, can I ask how exactly how much variation are you seeing and what value is the potentiometer itself?
Angus
What are each of potentiometer pins connected to? It should be (from one side to the other side) - Ground, A0, 5V. It doesn't matter if it's backwards, as long as GND is on one end and 5V is on the other end - the "wiper" of the pot will move from one end to the other.
If you've checked the wiring and it's correct, can I ask how exactly how much variation are you seeing and what value is the potentiometer itself?
Angus