Our voltage regulator on our Arduino Mega2560 is smoking, and we don't have any idea why. Can someone please help?
So we are designing a 3D bioprinter using an Arduino Mega2560 along with a RAMPS board to power our motors and LCD screen. We are using open source software for the RepRap printer Marlin (http://reprap.org/wiki/Marlin
). Our RAMPS board is powered by an external power supply unit. When we have only our motors plugged in, we have some control over them, but when we plug the LCD screen in, the voltage regulator starts to smoke.