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TCWORLD / AstroEQ

DIY Electronics System for connecting a non-Goto telescope to EQMOD
https://www.astroeq.co.uk
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Strange design of the Arduino version #28

Closed Violin9906 closed 6 years ago

Violin9906 commented 6 years ago

I recognized that the power source is directly connected with the Arduino VIN. And that caused my LP2985 on Arduino board burnd.

TCWORLD commented 6 years ago

The VIN pin is connected to the power supply by design. It's intended that the whole circuit be powered off the 12V supply so that if you are using a laptop it doesn't drain the battery as fast.

Genuine Arduino Mega boards are rated for a nominal VIN of 9-12V, of which 12V is in that nominal range. There absolute max rating on VIN is 20V. I recommend 9-15V supply range for both the Arduino and ATMega162 versions.

If powering the VIN pin with 12V fried your Arduino, it either means you are using a clone board which was not built with the same specifications as the genuine boards, or if you are using a genuine board then the board was defective anyway and should be returned.