connecting 3.3V to +3V Well, I hope this question won' t be buried to the dark depths of this forum as my previous q' s:) But I suppose it won' t this time cause it's pretty short without this introduction part...

I have an Arduino pro mini works with 3.3V and in the other hand, I have a DS1307 DIP ic, works with +3V. I was wondering if I could connect the ic to my Arduino directly.

Thats all. Thanks already:)
The 3V input on the DS1307 is for a 3V battery, usually a CR2032 or similar. The supply voltage of the DS1307 is 5V, which means that it won't work with a 3.3V Arduino without a separate supply and level shifter.