Unstable Sensor Readings

[Ron Suciu]

When I use a potentiometer or joystick in the examples I get constant updates from the onchange function with a large variation in readings. I have tried multiple power supplies, pins, parts.

I ran the diagnostics and they found no errors.

The only stable reading is at 0 for Potentiometer, and 180,-180 on the joystick.

I assume this is not the expected behavior, any suggestions.

Thanks,
Ron

[Yuki Sato]

@Ron-Suciu

Thank you for contacting.

First series of obniz has large a/d error compared from other computer boards.
If you had first series, then making vcc stable will improve a/d error like below.

And how large is it?
Callback function will be called every change including tiny changes. So normally it is called continuously because of a/d error.

Best Regards,

[Ron Suciu]

I have a Kickstarter version.
A potentiometer varies from 78-99 (reading multiplied by 180).
What capacitor size should I use (can't see in picture)?
Thanks,
Ron

[Yuki Sato]

@Ron-Suciu

Hello Backer!!!
Thank you for using!

Probably adding capacitor will reduce your error.
100uF is enough for stabilizing result.

Best Regards,