Electrical apparatus

An electrical apparatus which is compatible with a plurality of different voltages of commercial power supplies, and which includes a direct-current load driven by a direct-current voltage, the electrical apparatus comprising:

• a rectifier circuit arranged to rectify a power supply voltage;
• a voltage divider circuit arranged to subject an output voltage of the rectifier circuit to voltage division;
• a microcomputer including an input port to which an output voltage of the voltage divider circuit is inputted, an output port arranged to output an output signal to drive the direct-current load, an A/D conversion portion arranged to convert the voltage inputted to the input port to a digital signal, and a control portion arranged to determine a voltage of the commercial power supply based on the digital signal outputted from the A/D conversion portion, and generate a drive signal for optimum control of the direct-current load in accordance with the voltage;
• and
• a driver circuit portion arranged to drive the direct-current load based on the drive signal outputted from the output port of the microcomputer.