AC adapter for MacBook, MacBook Pro, and MacBook Air

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Can I make MagSafe2 to MagSafe1 converter?

i know theres a $10 product that MagSafe1 to 2 converter, but now i need the other way converter.

(because all my work friends uses new MS2 gear, but i use older MS1 MBP.)

so anyway, i heard MS1's output voltage is ~16.4v(maybe max 18v?), but MS2 is ~20v.

i tried uses not-their-own power adapter of other things, 10~15% of over voltage is not a problem so far. but this time is over 20% difference. i'm not sure about working well this time too.

assume i can make magnet 5 pin connector thingy, could i use 20v pin to pin? should i use a regulator like 7818? or couple of diodes?

Answer this question I have this problem too

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It is completely possible to do so. Just bridge the pins from the MS2 to MS1. They have the exactly same pinout.

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Thanks, coffee. How the h do you do that?

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Yes, but, it seems to me, Apple's MagSafe 2 Power Adapters are more discriminating (than Apple's MagSafe "1" Power Adapters) of when to switch-on their output. Aftermarket and counterfeit power supplies which are "always on" (always supplying "running" output potential, rather than a very low potential (to prevent sparking) during no-load state) will work. MagSafe 2 uses same ID data structure as MagSafe 1, so older MacBooks can recognise and accept MagSafe 2 power supplies.

I made a MagSafe 2 to MagSafe 1 converter. It works.

Another idea is to grind a MagSafe bit, to make it match the intersection of MagSafe bit shapes 1 and 2, which I attempted: I ground a MagSafe 2 bit to turn it into a MagSafe Intersection bit.

To test, I tried to use it with a MacBookPro7,1 (13-inch, Mid 2010). (If I had access to other MacBooks which have MagSafe 1 inlet, then I would have liked to try it with them.) My 60W A1435 Power Adapter works, and my 85W A1424 does not work, with test subject MacBookPro7,1.

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