Tests to perform after having applied inverse power to Vin?

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hi,

yes, did it, n00b, managed connect 9v battery inverse polarity vin , gnd pins of brand new arduino uno (r3).

funny thing is: still seems work fine. when connected wrongly, no lights lit up, no smoke appeared, nothing. since board gave no sign of life, thought wrong , disconnected battery. has been connected inverse polarity few seconds. switched around polarity , board lit normal, current sketch running nicely.
afterwards uploaded new sketches through usb (no battery power), played around bit. reconnected battery (the correct way) make sure still working on battery power well.

so i'd think. got worried , started surfing web , found on was: "if reverse polarity, you'll fry stuff sure" (most voltage regulator and/or capacitors?). wondering why didn't seem have negative effects , how check if entire board still working properly.

based on info found far, i'd need measure vin, 5v , 3.3v pins see output (when have 9v battery connected through power jack, i'll buying 1 today, no more messing around vin!). correct? if these values turn out normal, can safely presume board unharmed? there other tests / test sketches need try make sure processors unharmed? perhaps loopback test described in forum here, said, usb seems respond fine.

i have been lucky no bad effects appeared far, honest, surprise me. info on how make sure board 100% ok welcome. thanks!

quote
it still seems work fine


it's normal : there protection diode d1
have on general schematic or on extract have done


Arduino Forum > Using Arduino > Installation & Troubleshooting > Tests to perform after having applied inverse power to Vin?


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