Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Fu Tai Hua Industry (shenzhen) Co., Ltd.

Tai-Chun Li

Shih-Fang Wong

Tsung-Jen Chuang

Bin He

Hai-Wen Wang

A voltmeter of the present disclosure includes a multimeter, a first option switch, a second option switch, a control module, an adjusting power source and a button. The multimeter has a positive probe and a negative probe. The first option switch has two binding posts S1, S2, and a connection pin T1. The second option switch also has two binding posts S3, S4 and a connection pin T2. The positive probe of the multimeter is coupled with the connection pin T1 of the first option switch, the negative probe of the multimeter is coupled with the connection pin T2 of the second option switch. The control module can control the first option switch and the second option switch, and read a value of the multimeter, the multimeter and test a voltage of a circuit by the adjusting power source being equivalent to the voltage of the circuit.

Voltmeter and method for using the voltmeter

A method for automatically switching volume adjustment mode of an electronic device is provided. The method includes: storing a first predetermined volume and a second predetermined volume; when receiving a signal for volume adjustments, judging a current adjustment mode of the electronic device; if the current adjustment mode is the heavy adjustment mode, adjusting the volume with larger increment/decrement; if a value of the volume is larger than or equal to the first predetermined volume, switching to the light adjustment mode automatically; if the adjustment mode is the light adjustment mode, adjusting the volume with smaller increment/decrement; if the volume is less than or equal to the second predetermined volume, switching to the heavy adjustment mode automatically. The present invention also provides an electronic device capable of switching volume adjustment mode automatically.

Apparatus capable of switching volume adjustment mode automatically and volume adjustment method thereof

An audio electronic device includes a player, an output device, a detector, and an automatic turn-off module. The player is for reproducing audio data. The output device is for transforming the audio data to audible sound. The detector is for detecting positional shift of the output device. The automatic turn-off module is for turning off the player based on the positional shift. An automatic turn-off method is also disclosed.

Audio electronic device

A charging circuit for charging a rechargeable battery () includes a charge management unit (), a comparator () and a changeover switch (). The changeover switch () includes a default state of connecting the rechargeable battery to the comparator (), so that the comparator () produces a comparison result by comparing a battery voltage of the rechargeable battery () with a preset voltage threshold. The comparison result is transmitted to the charge management unit () and the charge management unit () controls the changeover switch () to switch from the default state to a controlled state if the battery voltage is less than the preset voltage threshold according to the comparison result. In the controlled state the changeover switch () connects the rechargeable battery () to the charge management unit (), so that the charge management unit () charges the rechargeable battery ().

Growing community of inventors

Shenzhen, China

Tai-Chun Li