Something like this:
http://jeelabs.com/products/aa-power-board
Or this:
(The second one, $5.95, outputs 5V from an input of 1 to 4V).
Now I know these are "online" but if you don't want to buy parts, you might have to say what parts you have.
Something like this:
http://jeelabs.com/products/aa-power-board
Or this:
(The second one, $5.95, outputs 5V from an input of 1 to 4V).
Now I know these are "online" but if you don't want to buy parts, you might have to say what parts you have.