Abstract: A corrosion sensor circuit includes a microcontroller, corrosion sensors, resistors serving as pull-up resistors, and a resistor serving as a pull-down resistor. The corrosion sensors are connected to power terminals at their respective one ends. The resistors have their respective one ends connected respectively to respective opposite ends of the corrosion sensors and have their respective opposite ends connected to an input port of the microcontroller. The resistor is connected to the input port at one end and to ground at an opposite end, being connected to no corrosion sensors.

Abstract: A first duct control apparatus is an apparatus that controls a motor that controls opening and closing of a duct opening and closing device provided in a duct for sending air from an air conditioner to a room, and includes: a power supply board that receives commercial power; a motor board that controls the motor based on the commercial power received by the power supply board; and a control board that controls the motor board based on the commercial power received by the power supply board. The motor board performs, for the motor, control of the opening and closing of the duct opening and closing device and control for adjusting a degree of opening of the duct opening and closing device. The power supply board, the motor board, and the control board are provided in a single unit.

Abstract: A printed wiring board includes a primary circuit that receives power supply of a high voltage from a high power source; a pattern for a low voltage circuit that is used when a low voltage component used for a low voltage lower than the high voltage and a power supply terminal block that receives power supply of the low voltage from a low power source are provided; a pattern for a common circuit that is used when a high voltage component used for the high voltage and the low voltage that insulates the pattern for the primary circuit from the pattern for the common circuit; a first insulator which insulates the pattern of the primary circuit from the pattern of the common circuit; and a second insulator that insulates the pattern for the common circuit from the pattern for the low voltage circuit.

Abstract: A printed wiring board includes a primary circuit that receives power supply of a high voltage from a high power source; a pattern for a low voltage circuit that is used when a low voltage component used for a low voltage lower than the high voltage and a power supply terminal block that receives power supply of the low voltage from a low power source are provided; a pattern for a common circuit that is used when a high voltage component used for the high voltage and the low voltage that insulates the pattern for the primary circuit from the pattern for the common circuit; a first insulator which insulates the pattern of the primary circuit from the pattern of the common circuit; and a second insulator that insulates the pattern for the common circuit from the pattern for the low voltage circuit.

Abstract: A voltage generation apparatus includes a booster circuit which outputs a direct-current voltage after having performed boosting processing, the voltage value of the direct-current voltage being specified on the basis of a pulse width of a series of pulse signals inputted, a direct-current to alternating-current conversion circuit which generates a ringer voltage to be supplied to a device connectable to a telephone line by converting the direct-current voltage outputted by the booster circuit to an alternating-current voltage, and a control unit which outputs a series of pulse signals to the booster circuit. the series of pulse signals having a feeding-voltage pulse width corresponding to a target voltage value of a feeding, voltage or a ringer-voltage pulse width corresponding to a target voltage value. the feeding-voltage pulse width and the linger-voltage pulse width being pulse widths having been set in a voltage adjustment stage.

Abstract: Disclosed is an image combining device includes a read unit and a control unit. The read unit includes a transparent holder and an image read section of flatbed type. The transparent holder holds a flat medium, and plural matching reference points are marked in an edge region. The image read section reads the medium placed on a reading window. A size of the medium is larger than the reading window. Each of the partial images, generated by the image read section, includes an image of a part of the medium and a part of the matching reference points. The matching reference points are arranged along a part of an edge of the image of the medium. The control unit combines the plural partial images based on the matching reference points included in the plural partial images, and generates a combined image including an image of the medium.

Abstract: A call signal generating device, whose pair of output terminals is connected to a telephone set, includes a rectifier rectifying an inputted high frequency signal and maintaining an output polarity in one of two polarities; and a polarity reverser generating a call signal by periodically reversing the output polarity of the rectifier and supplying it to the telephone set via the pair of output terminals.

Abstract: A voltage generation apparatus includes a booster circuit which outputs a direct-current voltage after having performed boosting processing, the voltage value of the direct-current voltage being specified on the basis of a pulse width of a series of pulse signals inputted, a direct-current to alternating-current conversion circuit which generates a ringer voltage to be supplied to a device connectable to a telephone line by converting the direct-current voltage outputted by the booster circuit to an alternating-current voltage, and a control unit which outputs a series of pulse signals to the booster circuit. the series of pulse signals having a feeding-voltage pulse width corresponding to a target voltage value of a feeding, voltage or a ringer-voltage pulse width corresponding to a target voltage value. the feeding-voltage pulse width and the linger-voltage pulse width being pulse widths having been set in a voltage adjustment stage.

Abstract: A call signal generating device, whose pair of output terminals is connected to a telephone set, includes a rectifier rectifying an inputted high frequency signal and maintaining an output polarity in one of two polarities ; and a polarity reverser generating a call signal by periodically reversing the output polarity of the rectifier and supplying it to the telephone set via the pair of output terminals.

Abstract: Disclosed is an image combining device includes a read unit and a control unit. The read unit includes a transparent holder and an image read section of flatbed type. The transparent holder holds a flat medium, and plural matching reference points are marked in an edge region. The image read section reads the medium placed on a reading window. A size of the medium is larger than the reading window. Each of the partial images, generated by the image read section, includes an image of a part of the medium and a part of the matching reference points. The matching reference points are arranged along a part of an edge of the image of the medium. The control unit combines the plural partial images based on the matching reference points included in the plural partial images, and generates a combined image including an image of the medium.