Abstract: In a heating device, a detector detects AC voltage of the AC power source. A control device detects a zero-cross timing of the AC voltage by using the detector and generate a signal having a high level period of time, a low level period of time, a rising transition changing from a low level to a high level, and a falling transition changing from the high level to the low level. The signal is such a form that at least one of the rising transition and the falling transition is in incoincidence with the zero-cross timing. The control device controls the heating switch to perform a switching action in which the heating switch is rendered on when the zero-cross timing is detected during the high level period of time and rendered off when the zero-cross timing is detected during the low level period of time.

Abstract: A low-capacity power supply is described in which an input capacitance may be adjusted. In one example, input capacitors may be located between an AC power supply and a rectifier. Additional adjustment capacitors may be located on one or more input lines to the rectifier. The adjustment capacitors may be added in series to at least one of the input capacitors to decrease the input capacitance of the rectifier. In this example, the power provided downstream of the rectifier may be adjusted to increased or reduced as needed. In other examples, additional switches are provided for the input capacitors to selectively add their capacitance to or remove their capacitance from the input of the rectifier.

Abstract: In a heating device, a detector detects AC voltage of the AC power source. A control device detects a zero-cross timing of the AC voltage by using the detector and generate a signal having a high level period of time, a low level period of time, a rising transition changing from a low level to a high level, and a falling transition changing from the high level to the low level. The signal is such a form that at least one of the rising transition and the falling transition is in incoincidence with the zero-cross timing. The control device controls the heating switch to perform a switching action in which the heating switch is rendered on when the zero-cross timing is detected during the high level period of time and rendered off when the zero-cross timing is detected during the low level period of time.

Abstract: A low-capacity power supply is described in which an input capacitance may be adjusted. In one example, input capacitors may be located between an AC power supply and a rectifier. Additional adjustment capacitors may be located on one or more input lines to the rectifier. The adjustment capacitors may be added in series to at least one of the input capacitors to decrease the input capacitance of the rectifier. In this example, the power provided downstream of the rectifier may be adjusted to increased or reduced as needed. In other examples, additional switches are provided for the input capacitors to selectively add their capacitance to or remove their capacitance from the input of the rectifier.

Abstract: An electronic apparatus is provided that can include a circuit board; a switch attached to the circuit board; an electronic part mounted on the circuit board; a wiring pattern extending between the switch and the electronic part; and a protrusion protruding from a surface of the wiring pattern. The protrusion may be disposed adjacent to the switch on the circuit board and overlapping the wiring pattern.

Abstract: An electronic apparatus is provided that can include a circuit board; a switch attached to the circuit board; an electronic part mounted on the circuit board; a wiring pattern extending between the switch and the electronic part; and a protrusion protruding from a surface of the wiring pattern. The protrusion may be disposed adjacent to the switch on the circuit board and overlapping the wiring pattern.

Abstract: An electronic apparatus that includes: a circuit board; a switch attached to the circuit board; an electronic part mounted on the circuit board; a wiring pattern extending between the switch and the electronic part; and a protrusion protruding from a surface of the wiring pattern, the protrusion being disposed adjacent to the switch on the circuit board and overlapping the wiring pattern.

Abstract: An electronic apparatus that includes: a circuit board; a switch attached to the circuit board; an electronic part mounted on the circuit board; a wiring pattern extending between the switch and the electronic part; and a protrusion protruding from a surface of the wiring pattern, the protrusion being disposed adjacent to the switch on the circuit board and overlapping the wiring pattern.