Abstract: A mobile phone anti-theft system includes a mobile phone, a SIM card and a real-name card-issuing system. The real-name card-issuing system includes a central processing unit, a first user information storage area, transmission equipment, and a card reader. The SIM card communicates with the central processing unit through the card reader and the transmission equipment. The real-name card-issuing system sends user information stored in the first user information storage area to the SIM card. If the SIM card needs to change the user information, it should verify first cryptographic keys with the real-name card-issuing system. The mobile phone includes a micro control unit, a second user information storage area and a transmission unit. The SIM card communicates with the micro control unit through the transmission unit. After each startup of the mobile phone, the mobile phone verifies second cryptographic keys with the SIM card.

Abstract: A traffic light system includes a traffic light unit and at least one reminding unit. The traffic light unit includes a plurality of traffic lights, a detecting module connected to the traffic lights, and a wireless communication module connected to the detecting module. Each reminding unit includes a central processing unit (CPU) and a signaling module, such as a speaker module connected to the CPU. The detecting unit detects the working statuses of the traffic lights and generates corresponding detect signals transmitted to the wireless communication module, the wireless communication module sends the detect signals to the reminding unit in a predetermined reminding area, the CPU processes the detect signals to obtain the workings statuses of the traffic lights and controls the speaker module to play corresponding audio signals to remind the user.

Abstract: A portable electronic device includes a housing, a processor unit received in the housing, and an anemometer unit mounted on the housing and electrically connected to the processor unit. The anemometer unit transforms pressure of wind blowing thereon into electronic signals, and the processor unit receives and processes the electronic signals to obtain wind pressures and velocities.

Abstract: An electronic device includes an audio module, a processor module connected to the audio module, and a sensor module connected to the processor module. The processor module directs the sensor module to detect temperatures at predetermined positions when the audio module plays back audio content, and the processor module regulates the playback volume or turns off the audio module according to the detected temperatures.

Abstract: A portable electronic device includes a housing, a processor unit received in the housing, and an anemometer unit mounted on the housing and electrically connected to the processor unit. The anemometer unit transforms pressure of wind blowing thereon into electronic signals, and the processor unit receives and processes the electronic signals to obtain wind pressures and velocities.

Abstract: A traffic light system includes a traffic light unit and at least one reminding unit. The traffic light unit includes a plurality of traffic lights, a detecting module connected to the traffic lights, and a wireless communication module connected to the detecting module. Each reminding unit includes a central processing unit (CPU) and a signaling module, such as a speaker module connected to the CPU. The detecting unit detects the working statuses of the traffic lights and generates corresponding detect signals transmitted to the wireless communication module, the wireless communication module sends the detect signals to the reminding unit in a predetermined reminding area, the CPU processes the detect signals to obtain the workings statuses of the traffic lights and controls the speaker module to play corresponding audio signals to remind the user.

Abstract: A mobile phone anti-theft system includes a mobile phone, a SIM card and a real-name card-issuing system. The real-name card-issuing system includes a central processing unit, a first user information storage area, transmission equipment, and a card reader. The SIM card communicates with the central processing unit through the card reader and the transmission equipment. The real-name card-issuing system sends user information stored in the first user information storage area to the SIM card. If the SIM card needs to change the user information, it should verify first cryptographic keys with the real-name card-issuing system. The mobile phone includes a micro control unit, a second user information storage area and a transmission unit. The SIM card communicates with the micro control unit through the transmission unit. After each startup of the mobile phone, the mobile phone verifies second cryptographic keys with the SIM card.