It is simple way how to test DC Voltage regulator circuit using multimeter We will do a voltage regulator test, the output voltage level. For example we want to do testing on a 7805 regulator. IC 7805 regulator designed provide a fixed output voltage of 5V, if the good results it will be measured at the pin (3) the amount of output voltage of 5 volts DC. To perform the test we need a DC