View Full Version : Propeller Proto Board source voltage

11-21-2010, 10:22 PM
I've started planning a new project that will use the propeller proto board. I know it requires 6-9vdc. My question is...will it survive running on a 12vdc 1A wall wart? I looked up the data sheet for the on board LM1086 regulators and it looks like they can handle 12vin just fine. Is the 9vdc maximum recomendation because of not being able to get rid of the heat with higher Vin?

Because of a 12vdc solenoid, I am required to use a 12vdc supply. I have no problem using a preregulator to drop the voltage to 7vdc. I understand why the minimum voltage is 6vdc due to the 5vdc regulator, just not why the maximum is 9vdc.

If anyone could educate me on this it would be greatly appriciated! :)

11-21-2010, 10:30 PM
It'll get a bit warm because of the additional heat generated by the 5V regulator but it won't come to any harm.

11-21-2010, 11:52 PM
Thanks Leon,

I was kinda thinking the same, but was worried if the extra heat would be too much to be sinked away since the regulator was surface mounted to the board. The board will be in an enclosed cabinet, but will have a couple inches of air space around it. So I would asume that any extra heat generated would be able to get away.