power supply tester Voltage test :+12V, -12V, +5V, -5V, +3.3V,+ ... : 20/24 pi Power Supply Tester The SD power supply tester is a robust voltage tester for PC power supply.ATX,BTX and ... voltage.The PC/SPS is suitable for the ambitious hobby user,as well as for a quick functional check in specialized ... into the corresponding jack of the power test suite Power on the supply of power,will hear (DuDu" ring,if ...