Chronic restarting - Yun powered via 12V through L7805 issues

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hey,

i can run sketch no problem when power yun via micro usb , upload.

when unplug usb , proceed power yun via 12v through l7805(5v voltage regulator), sketch doesn't seem initialize when boots , yun onboard leds seem flair ~ every 10 seconds - i'm assuming restarting yun each time lights flair up. voltage regulator how sending variable amounts of volts yun , causes restart continuously?

12v -> female adapter -> breadboard + -> l7805 -> yun.

has encountered problem this?

does l7805 hot ?

it dissipating approximately (12-5)*0.3 = 2.1 w.  while not lot, if not have heatsink might quite hot.  might thermal shutdown , maybe causing see.  size of capacitor use @ output of regulator.

i using switching regulator pin compatible 7805 quite ,  has efficiency of 80-90%, dissipates less 200mw.


Arduino Forum > Products > Arduino Yún (Moderator: fabioc84) > Chronic restarting - Yun powered via 12V through L7805 issues


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