3.5 Audio Plug

3.5mm plug refers to a coaxial audio plug with a diameter of 3.5mm. It is a connector commonly used to connect audio equipment to transmit audio signals. The earphone is divided into three layers of stereo.

The most common stereo headphones are divided into three layers, and there are also two layers. Each layer has a corresponding function. If you want to DIY, you must layer it. The standard distribution is "left and right ground red and white" (from the end to the root are the left channel, the right channel, and the ground wire, of which the left channel is usually white, and the right channel is usually red). Generally, DIY earphones can be connected as shown in Figure 1 (Figure 1B is a common three-layer connector), twist C1 (usually yellow) and C2 (same as C1) into one strand, connect 3-0 as the ground wire, and R (red) wire Connect 3-1 for the right channel, and connect 3-2 for the left channel with the G (green) cable. If it is a four-layer mobile phone with a microphone earphone, it is the left sound channel, the right sound channel, the microphone, and the ground wire from the top to the root.

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