Hi guys iam recently bought a Arduino board.and its working fine .but now iam facing a problem that the
micro controller is overheating with in seconds about(20s).iam making a eeprom based code lock with arduino uno ,16x2 lcd, 4x4 keypad ,relay module.how ever iam giving power from my pc through usb cable and the relay and lcd taking power from the arduino directly. i dont know what it goes wrong. any body know please help me.
If the chip is getting too hot to touch you are probably trying to draw too much power from the I/O pins. Does the Arduino work OK when you disconnect the other hardware and run something simple, like the Blink example?