I know that the older version of Duemilanove had power output 5V and 9V, the newer version has 3.3V and 5V. Why did they change it like that? Is it good for battery saving? In my opinion, if 9V is too much, then I can always use resistors...

Old Duemilanove vs. New Duemilanove: Power Output

system May 18, 2010, 9:47pm 7

um... wouldnt that mean that there is somehow a 9V source on the VIN :o :o :o ?

Topic		Replies	Views
Duemilanove Power Frequently-Asked Questions	11	5428	May 6, 2021
Arduino releases 5V from 9V battery? Interfacing	8	7969	May 6, 2021
Powering Arduino w/ 9 volt battery Frequently-Asked Questions	3	1551	May 6, 2021
VIN to power servos Development	7	5137	May 6, 2021
9 volt power to Duemilanove Frequently-Asked Questions	12	4258	May 6, 2021