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Powering up 1701mini board from external supply.

Question asked by Skfir on Jun 9, 2013
Latest reply on Jun 10, 2013 by gr4eme

Hello guys!

Just a short question, I have got a 1701mini board and yesterday I built a 3.3v power supply. I would like to test, whether it is good enough to power up the 1701 processor. So what I want is to bypass the on-board linear regulator and power up the board from my external supply. The simplest idea is to solder a wire to the output of the on-board linear regulator, but what I do not know is how that regulator will behave if it is switched off and an external voltage is applied to its output. So if somebody, who knows the "anatomy" of the on-board linear regulator might tell me, whether it would be fine to simply solder an external wire to its output and apply my 3.3v, or I have to do something else, to power up the whole 1701mini board from my external supply?

Thanks in advance!


P.S. I am sorry if this question is kind of stupid, the idea is, I am not an engineer, my major at the Uni is piano performance, so in terms of electronics I am self-taught and do not have much experience also.