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I want to design a charging unit for IPhones. I have made a prototype but it’s not how I want it to be. I want the two separate retractable mechanisms to be connected to one usb output which will stay stationary. The problem I have at the moment is both wires have to be pulled at the same time for it to work effectively. I believe it would be similar to a retractable extension lead but I have no idea what I’m doing!

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I'm not really sure what the aim is with this. What problems does this seek to solve over a standard iphone charger ?
 
I'm not really sure what the aim is with this. What problems does this seek to solve over a standard iphone charger ?

Unless it provides a far far more reliable and robust connection between the lightning connector and the cable you are wasting your time.

I've lost count of how many lightning cables my family have "consumed"
 
Precisely like that but I just spoke to him on the phone and he has no more money to fund the business as he’s a taxi driver from Mexico. I could also make huge improvements on what he designed

Missed a trick there. Should have asked him where he got his retractable mechanisms from.
You can buy retractable iPhone cables for a few quid on ebay. Maybe start there.
 
Missed a trick there. Should have asked him where he got his retractable mechanisms from.
You can buy retractable iPhone cables for a few quid on ebay. Maybe start there.
I have that’s how I designed my prototype but it doesn’t work correctly because when one cable moves so does the other
 

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