Strange power issues

[Deruty]

When I turn a port off instead of going to 0v the pin continues to supply aprox. 1.9v Can anyone help me w/ this. I'm using the $50 robot tutorial btw.

EDIT: I read some other people's problems and figured it out. Thanks anyway.

[sonictj]

if your DDR register is set your port might act like this.  Is there a problem, or are you asking out of curiosity.

[chelmi]

if your DDR register is set your port might act like this.  Is there a problem, or are you asking out of curiosity.

hmmm it should not. Low state is 0V to 0.7V, high state is 2.2V to 5V. 1.9V is in the "gray" zone and is invalid.
Deruty, what was wrong ?

[sonictj]

hmmm it should not. Low state is 0V to 0.7V, high state is 2.2V to 5V. 1.9V is in the "gray" zone and is invalid.

I thought there were different threshold associated with input versus output on the AVR but I could definitely be wrong about that.

**EDIT: checked and chemli is definitely right 1.9V is in the gray zone.