i plugged in 9v 650ma supply came from early version arduino kit and the board blinked all leds and saw smoke .i immediately unplugged it . is the board still good can i still use it?
Once you let the magic smoke out…
Where did you apply the power? Should have been OK if applied to the logic power in terminals.
Alan KM6VV
Normally when there’s smoke, something burnt. Can you show us in a picture how you plugged in the 9V battery (but don’t have the battery connected), and did you have anything else connected to the board at the time? Is this the DFRobotShop Rover or a normal Arduino board?