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testing USB Power delivery

Open ij0n opened this issue 10 years ago • 3 comments

We should aquire a device for measuring current and voltage at our charger-ports and then debug, why they deliver so little power.

a device for this could be: http://www.mobilefun.de/45122-usb-stromspannung-messgeraet.htm?utm_source=froogle&utm_medium=comparison&utm_campaign=froogle&referer=PLA&gclid=Cj0KEQiArK6lBRC5-_jv48uxgrgBEiQAuxdZ9Wz5vmxutXjEFa6Ncv9nYDwx085IZ-gL4m-datw8GV0aAjUS8P8HAQ

or we can make one ourselfes by cutting up a usb-cable.

ij0n avatar Jan 06 '15 18:01 ij0n

@ij0n I should be getting a USB power doctor delivered today

bergie avatar Jan 06 '15 18:01 bergie

2015-04-18

Here is what we get out of the ports now.

From @jonnor

when plugging in an Anker, the voltage drops to 4.3V / 0.45A - consistent with the resistance being too high when having one phone, connected with 4.6V/0.3A - and then pluggin in the Anker the voltage/amps stay the same suggesting that the problem is between the power supply and the individual power socket (as opposed to between the powersupply and whatever input it has) all ports on one side show approx the same results

might be a good idea to get a new USB-A male-to-female cable and try switching that to one of the ports

bergie avatar Apr 18 '15 22:04 bergie

Fuck USB-b, the proven solution is to take high quality USB-a cable, cut it to length, peel the USB-b from the neutrik plug to expose the USB-a pins, solder the cable to the correct pins, test, plug to table, profit.

cannonerd avatar May 11 '17 20:05 cannonerd