Can we connect a normal earphone / headphone (those that we connect to the Desktop PC) to the Android phone or devices?
This is because I notice that the one on the left (the original one that come with the phone) have 4 connector but the one we use on Desktop PC have 3 connector.
Was wondering if it will short-circuit and damage the phone or the port itself.
Answer
The typical audio only jack has 3 rings, usually call Tip, Ring, Sleeve (TRS). These typically map to Left, Right, and Ground. Phone manufactures wanted to make this jack work with existing headphone so they used a connector with 4 rings, called Tip, Ring, Ring, Sleeve (TRRS). These map to Left, Right, and Ground just like the 3 ring, but the final connector maps to a microphone. This makes it so that if you plug an audio only cable into it, the microphone input gets connected to ground so nothing is hurt. It also means that if a headset with microphone is connected to an audio only device, the microphone is connected to ground, also hurting nothing.
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