What is the Type-C interface

Type-c stands for USB Type-C interface, which is a new FORM of USB interface. The USB Type-C port is 8.3 mm wide and 2.5 mm thick, while the Micro USB port is 7.4 mm wide and 2.35 mm thick. The Type-C port is slightly larger than the Micro USB port and thinner and thinner than the traditional USB port.

In addition to the thin USB Type-C, other advantages are more worthy of attention. If both sides can be inserted, the fiber can withstand tens of thousands of times of repeated insertion, transmission speed up to 10Gbps, power supply capacity up to 100W, strong expansion capacity in addition to charging, data transmission can also be audio.

The method of changing USB Type-C data line to OTG data line has been introduced before. In a word, it is summarized that CC pin is connected to the ground with a pull-down resistance of 5.1K or so, transforming the operation mode, so that Vbus pin can supply power to U disk, mouse, keyboard and so on. The mobile phone can read the files in the USB disk directly, and also can copy the files in the mobile phone to the USB disk. There is no need to transfer data through the computer, which is very suitable for use when going out. USB Type-C interface definition, teach you to change the type-C data line into OTG data line

It has just been said that USB Type-C data line can not only charge and transmit data, but also transmit audio and video, etc. Many Android phones not only replace traditional Micro USB with Type-C interface, but also cancel 3.5mm headphone jack. Only type-C to 3.5mm headset conversion cable can be used for such a mobile phone to use earphones. After studying type-C interface definition and relevant data, it is found that pins corresponding to type-C output audio and receiver signals are shown in the figure below. Pins 6, 7, and 8 correspond to the right sound channel, left sound channel, microphone and microphone, and pin 1 corresponds to the GND of the earphone.

The earphones used in mobile phones are three and four sections, with four cables, namely GND (ground), Mic (microphone), L (left channel of earphone), and R (right channel of earphone). Using a multimeter to measure a variety of earphones, most of them are the first connection method, only Nokia is the second connection method.

In this way, we can make a USB Type-C to 3.5mm earphone adapter cable by contacting each pin of Type-C with the microphone of earphone and the left and right channels of earphone. Experience the fun of DIY and enjoy the joy of success. Note that the random Type-C data cable of the mobile phone is completely missing some shrink pins. Before transformation, check whether the required pins are in good condition. In addition, USB Type-C plug has many pins, so manual welding is difficult. Please do it within your capacity.