AVR-Chat

Hi,

    I do not have speed or space problems so I think I can get away nicely 
with just a voltage divider even if the bus is bidirectional. If I am not 
missing anythink obviuos, from 5v to 3v it will work as a regular voltage 
divider and from 3v to 5v it will act as a simple series resistor and a 
resistor to ground that will not affect the voltage levels at all... Looking 
at my display specs the levels will be well within the limits..

Best regards,
Alexandre Guimaraes



> For output lines from the 5V to 3.3V system, a simple resistive divider 
> will do.
> For inputs, check the data sheets, but in almost all cases you'll find
> that the guaranteed levels on the 3.3V system are high enough and low
> enough to be valid 1's and 0's to the 5V system without modification.
> Bi-directional lines are more interesting, but still not that hard.
>
> Maxim loves to charge you $5 to solve a $0.05 problem.