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Hello everyone, today we are going to learn about the interface of Apple adapter

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There are three common interfaces for Apple adapters

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The first is the Type-C interface, which is the latest

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A little bit older is this T-shaped interface,

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and the older one is this toothbrush head interface

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Both the T-shaped and the toothbrush head interfaces are magnetic

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There's a magnet on the laptop's source,

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and when the adapter gets close to the port, it gets caught

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The 5 contacts in the adapter are connected to the 5 contacts on the power supply head

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The line in the middle of the contact is called intermediate pin, or One-wire bus,

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and is used to transmit the power information of the adapter

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The two outermost lines are the ground wires, which is the negative terminal of the power supply,

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and the two near the middle are the power supplies

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There's a lamp up here

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And this lamp has three states

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When the lamp is off, the communication between the intermediate pins is abnormal,

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or the EC conditions are not met

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The second state is when it turns green,

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indicating that the intermediate light is communicating normally and the battery is fully charged

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If it is bright orange, it means that the intermediate pin is communicating normally and charging

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The new machine now uses the Type-C adapter

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The Type-C adapter does not have the intermediate pin,

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but it has a CC bus for transmitting the power information of the adapter,

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which we call PD protocol communication

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If the CC bus communication is abnormal,

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the adapter will not be able to provide proper power to the laptop

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Okay, here's the Apple adapter