inputs.text: piece junk damage equipment may shock - dont ever think buying piece garbage bought replace existing power supply wanted use something else power small machine controlled computer switched power voltage set 7v current set 010amps current overload smoke came machine turned piece trash hard 42 volts negative terminal ground words connected 120v 60w light bulb negative output power cords ground pin no connections bulb lit 42v obviously damaged equipment well computers port also see basic safety problemsis poor design faulty manufacturing makes no difference damaged equipment piece junk