Bike Forums - View Single Post - How much did your Dynamo setup cost?

03-07-16 | 03:04 PM

#16

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Bikes: 1961 Ideor, 1966 Perfekt 3 Speed AB Hub, 1994 Bridgestone MB-6, 2006 Airnimal Joey, 2009 Thorn Sherpa, 2013 Thorn Nomad MkII, 2015 VO Pass Hunter, 2017 Lynskey Backroad, 2017 Raleigh Gran Prix, 1980s Bianchi Mixte on a trainer. Others are now gone.

Quote:

Originally Posted by fietsbob

Dynamos for Bikes have long been making Out Put standardized to be 6v 3W..

usb output is another standard https://en.wikipedia.org/wiki/USB

so likely ... 5v @ maybe 1.5 or 3 Amp..

I don't think so. At 5 volts and 3 amps, that is 15 watts. I am not aware of any hub that can pump out that wattage. My SP PV8 hub and AXA Luxx 70 Plus USB charger will put out about 0.5 amps (500 milliamps) at 5 volts, but occasionally it will go up to about 600 milliamps for a second according to my current flow meter. That is a bit under 3 watts out of the USB port. Other USB chargers might do better, but you still are unlikely to get over 4 watts out of the USB port if you are going down a hill for good speed.

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