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Topic: Strange readings from analog pins using potmeter (Read 542 times) previous topic - next topic


Sep 04, 2010, 11:58 am Last Edit: Sep 04, 2010, 12:22 pm by Stigern Reason: 1

I've just took out my arduino boards again, and I tought I should start with just the easy Knob tutorial to refresh my arduino skills :P

Anyhow, I've noticed the servo didn't respond like it should. So I put
a serial.print on the reading just to see the value. And it's stuck around 250-300, no matter how I adjust the pot.

So first I changed to another 10k potmeter, same there. Then tried another arduino board. Same there. Also tried changing to another analog pin, but same thing there...

Then I tried the good old Arduino Diecemila(or how its written). Then it read the values perfectly!

Why wont my Picos, Nanos, Boarduino, BareBonesBoard show the correct value from 0-1023 when adjusting the pot? And only the old
diecemila. It's very strange, and I'm very confused right now ....

Cause I wanted the Modified Pico or some other board like the Boarduino to control some servos.

Only the good old arduino diecemila. Thats strange.

I use 5+ and GND for the outer pins, then the center pin I got on analog2.

Picture of the simple wiering on a Modified Pico

Uploaded with ImageShack.us

White is center pin, red & black are gnd and 5v
I'm from Norway!


Sep 04, 2010, 12:49 pm Last Edit: Sep 04, 2010, 12:50 pm by AWOL Reason: 1
What are those unconnected pins across the top of the board labelled "A0", "A1" etc?
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.


Sep 04, 2010, 12:52 pm Last Edit: Sep 04, 2010, 12:52 pm by Stigern Reason: 1

My god, how can I be so stupid :P

I blame the in-activity lately, it's like 5 months since I last used my arduino boards.


Works fine now :P
I'm from Norway!

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