Patent ID: 6943534

Claim:
A multipurpose transforming device comprising: a power supply device having a power import device for accepting external AC power and a power output device for supplying DC power to an electric device load, the power supply device including: an AC supply unit coupled to the power import device for transforming alternating current from an external source into direct current and outputting the direct current; a voltage-regulating unit having a first input coupled to an output of the AC supply unit for accepting the direct current and supplying a regulated voltage to the electric device load, the voltage-regulating unit having an output coupled to the power output device; a galvanometry unit coupled to the output of the voltage-regulating unit for sampling a load current from the voltage-regulating unit, the galvanometry unit converting the sampled load current into a current value for coupling to an output thereof; a microprocessor coupled to a memory and having a first output coupled to a second input of the voltage-regulating unit for controlling the valve of the regulated voltage, the microprocessor having an input coupled to the output of the galvanometry unit for receiving current values therefrom at uniform time intervals, the microprocessor controlling the voltage-regulating unit to output a test voltage supplied to the electric device load in discrete steps from zero to a final voltage value, each step being at the uniform time intervals, the final voltage value being established by the microprocessor responsive to a match between the current values and the test voltage with voltage and current load data pre-stored in the memory, the voltage-regulating unit supplying the regulated voltage equal to the final voltage value to the electric device load.