Voltage regulation on mains powered XINO board.

Projects General Guidance
1

I'm using 'XINO Basic Boards' (no voltage regulators) On a current project

Xino--> ciseco.co.uk

I want to power the thing from the mains. I've bought a 5v regulated power supply but am wondering whether it's worth using a 7805 voltage regulator to keep things under control. I'm new to powering stuff by the mains so I'm not sure how reliable "regulated" wall warts are.

I was looking at this circuit for adding voltage regulators but i'm not sure if it's a bit overkill.

http://www.microbuilder.eu/Tutorials/Fundamentals/voltageregulation.aspx

I need these things to be on for at least an hour at a time and will be powering a servo and a few LEDs. more background on my project here: http://jedcullenfmp.tumblr.com/

2

If you have a 5V regulated wall-wart then a 7805 will do more harm than good since it will drop the voltage down to about 3.5V-4V. If you put in X volts into a 7805 you will get out either 5V or X-1.5 (or so), whichever is smaller.

If you are concerned about cooking something instead consider putting a fuse (resettable, or PTC, has less nuisance) in series with your 5V wall wart. But I would trust it.

--
The Ruggeduino: compatible with Arduino UNO, 24V operation, all I/O's fused and protected

3

Great idea,

thanks a tonne!