Re: [avr-chat] AVR board with USB and LCD

[Pertti Kellomäki]

2. kesä 2005 kello 23:17, Marvin Dickens wrote:
> You need to make sure all of your peripherals are the same voltage 
> because
> it is very likely that most of the modules that you purchase are going 
> to
> be 5 volt (It's the way many modules come). It is possible to have 5v 
> and 3.3v
> in your design, but it adds complexity to the design you may not want 
> to deal
> with.

Yes, I think I can see the pain. Given that the Butterfly specs give the
supply voltage as 3.1V - 4.5V, and the USB module is rated 4.4V-5V,
I guess my best option would be to forget the Butterfly's battery and
drive the whole thing from three 1.5V batteries.
--
Pertti