A magnetic induction circuit, a magnetic-controlled switch circuit, a magnetic-controlled device and a magnetic-controlled lamp. The magnetic induction circuit includes a magnetic induction module, a voltage comparison module and a voltage output module. The magnetic induction module is configured to sense an external magnetic field to generate a first voltage signal. The voltage comparison module is configured to receive the first voltage signal, and output a second voltage signal. The voltage output module is configured to process the second voltage signal and output a third voltage signal.

A magnetic induction circuit, a magnetic-controlled switch circuit, a magnetic-controlled device and a magnetic-controlled lamp. The magnetic induction circuit includes a magnetic induction module, a voltage comparison module and a voltage output module. The magnetic induction module is configured to sense an external magnetic field to generate a first voltage signal. The voltage comparison module is configured to receive the first voltage signal, and output a second voltage signal. The voltage output module is configured to process the second voltage signal and output a third voltage signal.

A magnetic induction circuit, a magnetic-controlled switch circuit, a magnetic-controlled device and a magnetic-controlled lamp. The magnetic induction circuit includes a magnetic induction module, a voltage comparison module and a voltage output module. The magnetic induction module is configured to sense an external magnetic field to generate a first voltage signal. The voltage comparison module is configured to receive the first voltage signal, and output a second voltage signal. The voltage output module is configured to process the second voltage signal and output a third voltage signal.

A magnetic induction circuit, a magnetic-controlled switch circuit, a magnetic-controlled device and a magnetic-controlled lamp. The magnetic induction circuit includes a magnetic induction module, a voltage comparison module and a voltage output module. The magnetic induction module is configured to sense an external magnetic field to generate a first voltage signal. The voltage comparison module is configured to receive the first voltage signal, and output a second voltage signal. The voltage output module is configured to process the second voltage signal and output a third voltage signal.

An infrared circuit for a single battery and a remote controller using the same are provided. The single battery outputs a battery voltage. The infrared circuit comprises an IR LED circuit, an inductor and a microcontroller. The IR LED circuit is coupled between the battery voltage and a common voltage. The inductor is coupled between the battery voltage and the common voltage. The microcontroller has an I/O port coupled to the inductor and the IR LED circuit. When infrared rays are emitted, the microcontroller controls the battery voltage to charge the inductor through the I/O port, and a continuous current of the inductor forces the IR LED circuit to turn on.

A lamp lighting device is used to light a discharge lamp provided as a light source in a fluorescence detector. The discharge lamp has a configuration in which an anode and a cathode are arranged to be opposite to each other in a discharge container. The lamp lighting device includes a lamp driver, a lamp-voltage detector and a deterioration determiner. The lamp driver drives the discharge lamp. The lamp-voltage detector detects a lamp voltage in a monitoring period until a discharge state reaches a predetermined stable state after a discharge lamp in an unlit state is lit due to electrical breakdown. The deterioration determiner determines a deterioration state of the discharge lamp based on a detected lamp voltage.

A lamp lighting device is used to light a discharge lamp provided as a light source in a fluorescence detector. The discharge lamp has a configuration in which an anode and a cathode are arranged to be opposite to each other in a discharge container. The lamp lighting device includes a lamp driver, a lamp-voltage detector and a deterioration determiner. The lamp driver drives the discharge lamp. The lamp-voltage detector detects a lamp voltage in a monitoring period until a discharge state reaches a predetermined stable state after a discharge lamp in an unlit state is lit due to electrical breakdown. The deterioration determiner determines a deterioration state of the discharge lamp based on a detected lamp voltage.