October 28, 2008
The 3 volts from 2 AAA's that I was using for my small project isn't enough to make it speed across carpet due to the voltage loss across the components. The motors end up getting about 2 volts instead of the full 3 they need to even move (I've tested it). So, I wanted to just throw in another AAA and bump the whole thing up to 4.5V (I did the math ... all the components, including the LED's, would be fine). Only problem is ... the robot (Blinky) is so small that there's no room for another AAA battery.
So anyway, I was at Radio Shack today and I picked up a 5V voltage regulator. I'm not totally sure how it works, though. Is it meant to take 5V, and then stabilize the voltage to stay there? Or, can I hook it up to a 9V or 12V battery and power my project with 5V through the regulator? Also, if I do that, will it overheat?
Lastly, what's the difference between using a voltage regulator and just doing the same thing with resistors?
Notice the forum category ... sorry I'm a noob. :)