I am working on a big project that uses multiple infrared sensors, motors, solenoids, lights, and pushbuttons. I ultimately wanted to run everything using a 9V DC power supply through my Arduino MEGA. Last night my Arduino got really hot to the point you couldn't even touch the area by the DC power …

Using Power from two Arduinos

Using Arduino Motors, Mechanics, Power and CNC

schoolsterz123 January 30, 2013, 7:02pm 8

If I use the DC power supply to power this stuff should the ground be connected to the Arduino also or only the components I'm using to draw power from the power supply?

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Using Power from two Arduinos

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