I want to power a prototyping kit for an 8 pin picaxe micro-controller with a 9v battery (the board itself requires a 5v input).
I have the following regulator: https://www.sparkfun.com/products/107
On the 3rd page of the data sheet says that for that 5v regulator, the min voltage is 7 and the max voltage is 25 (input).
However, in the comments section of the first link,a few people said that it is not a good idea to use this regulator to reliably drop voltage from 9v to 5v.
Questions: What do you think? Does that voltage regulator fit my expectations?
What would happen if I find that 5v battery and connect the 5v battery to the voltage regulator? What voltage would it output?
Thanks so much!