12mm Micro USB Cable For Blackview BV6000BV5000BV4000Geotel

A mobile phone data cable is a cable used to connect a mobile phone to a computer. English usb data cable Generally, there are few dedicated data lines. The common phenomenon is that a data line can be used for a variety of mobile phone models. Some models have exaggerated data lines. One line can use 30-40 different types of mobile phones. The working principle of the data line: -5V to -15V in RS232C represents 1, +5V to +15V represents 0; while in TTL circuit, more than 3V represents 1, and less than 0.2V represents 0. The MAX232 integrated circuit realizes the conversion between RS232C and TTL circuit. Among them, pin ⑧ receives the TXD (transmit data) signal sent from pin 3 of the serial port, and after conversion, it is output from pin ⑨ to the 6-pin IO-RXD (data reception) of the mobile phone; ⑩ The pin receives the IO_TXD (data transmission) signal sent from the mobile phone. Output from pin ⑦ to the 2-pin RXD (receive data) and 1-pin DCD (receive line signal detection) of the serial port. The working power of MAX232 is provided by the serial port. The voltage of about 12V output from pins 4, 6, 7, and 8 of the serial port is rectified by two 1N14148 diodes, and then regulated by a 78L05 voltage regulator to output a voltage of 5V to the ⒃ pin of MAX232 for the integrated block to work. . The 5V power supply is also sent to the 3-pin of the plug, which can charge the mobile phone. If you don't want to use the charging function, you can leave the 3-pin soldered or add a small switch in front. The four capacitance parameters of MAX232 have an impact on the transmission speed of the data line. Here, the recommended value of the manufacturer is luF (0.1uF for MAX232A and MAX3232). The 470uF and 47uF capacitors are power filter capacitors. If you want the circuit to have a data transmission indication function, you can add an indication circuit.