Don'ts Associated with Arduino

Before actually making the Arduino work I stress on what is not to be done with an Arduino. Arduino is meant for digital programming and processing and so you can't expect huge power from it. There are certain limits to the current that can be drawn from the board. The limits depend on the atMEGA chip on board. The chip mounted on Arduino UNO is atMEGA 328 and this chip can take/give a maximum of 20.0 mA and the Vcc=5 volts and ground can give a maximum of 200.0 mA while the ground can take a limiting 400.0 mA current. But still I advise you not to drive loads that take more than 10 mA of current to be on the safer side. !!WARNING: DON'T EVER TRY TO DRIVE MOTORS OR SOLENOIDS OR SPEAKERS WITH ARDUINO!!. To be clear I am posting the technical specifications associated with Arduino UNO board (Credits arduino.cc):