how to extend usb c cable (usb 3)

Thread Starter

abdalgani

Joined Jul 4, 2023
2
its look like this qus is simple but its not at all see here what i did
i have m1 air base model, and i have lack of capacity, its only 256 so i thought i need more space
so i thought why not put m.2 inside the divece, (of course i know that it not support that nativly)


so i opened the lap and i found place will be enouph to put m.2 with all adapters to usb inside the macbook air it self as you will see in photos and i used usb to m.2 with lowerst thinkness avalible in market (around 3mm) so i can close the cover easly. so every thing perfect


i choosed good usba to usbc adapter that support usb 3 i removed usb 3 part and i solders cables


then i did same thing for m.2 adapter, all cable connected well, and ohm between the cables is near to zero


when i connect it adapter work but m.2 no


i saw this problem before when i was choosing usba to usb c adapters, some of chinese bad ones did same thing same problem exacly, so i think my cables not best idea


but i cant understand why it not working iam sure if i connect mouse or kayboard it will work, but why m.2 not working even in usb2 speed


these photos of my great idea i hope you can help me guys iam counting on you all
 

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MrChips

Joined Oct 2, 2009
30,819
Every piece of conductive wire is a transmission line.
As the frequency gets higher, transmission line impedance becomes critical.

USB signalling uses very high frequencies. USB began at 1.5Mbit/s. USB 2 runs at 480Mbit/s. USB 3 runs at 20Gbit/s.
There is no way to extend USB with single wires the way you have done it and hope to get reliable operation.
 

Thread Starter

abdalgani

Joined Jul 4, 2023
2
Every piece of conductive wire is a transmission line.
As the frequency gets higher, transmission line impedance becomes critical.

USB signalling uses very high frequencies. USB began at 1.5Mbit/s. USB 2 runs at 480Mbit/s. USB 3 runs at 20Gbit/s.
There is no way to extend USB with single wires the way you have done it and hope to get reliable operation.
i think this correct
because when i made the cable shorter to 10cm it worked on usb2 and not in all diveces work some only
so now i will do same project in another way and this time it will work

thank you man
 
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