@robertdunn60451 The tiny center pin is a charge control (Adapter Sense) pin that assists with changing the LED color, and also assists with switching the adapter off. There should be low power output (3V-6V) from any of the other ports until contact is made with the center charge control pin. This pin is also used to transfer additional Information like the power type and serial number of the power supply. it is my understanding the Magsafe uses 3 volts to power a power management chip inside whatever it is connected to. Ones it communicates and verifies with that PMIC about charge compatibility it will supply the full voltage. If you can't measure it like that, apply a 40 kΩ resistor between the MagSafe's output and ground which will then enable the full voltage.
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@robertdunn60451 The tiny center pin is a charge control (Adapter Sense) pin that assists with changing the LED color, and also assists with switching the adapter off. There should be low power output (3V-6V) from any of the other ports until contact is made with the center charge control pin. This pin is also used to transfer additional Information like the power type and serial number of the power supply. it is my understanding the Magsafe uses 3 volts to power a power management chip inside whatever it is connected to. Ones it communicates and verifies with that PMIC about charge compatibility, it will supply the full voltage. If you can't measure it like that, apply a 40 kΩ resistor between the MagSafe's output and ground which will then enable the full voltage.
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@robertdunn60451 The tiny center pin is a charge control (Adapter Sense) pin that assists with changing the LED color, and also assists with switching the adapter off. There should be low power output (3V-6V) from any of the other ports until contact is made with the center charge control pin. This pin is also used to transfer additional Information like the power type and serial number of the power supply. it is my understanding the Magsafe uses 3 volts to power a power management chip inside whatever it is connected to. Ones it communicates and verifies with that PMIC about charge compatibility it will supply the full voltage. If you can't measure it like that, apply a 40 kΩ resistor between the MagSafe's output and ground which will then enable the full voltage.
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