Originally Posted by
bmike
If the power to the charger is wired in parallel this will work, that's how I ran my USBWerk with my eDeluxe light.
My Revo does not have an off switch - so I want to be able to easily switch it off or to charge.
Are you building in a cache battery? I would be worried about directly charging a device from the hub direct without even small buffer battery. It tend to add a tiny bit of inefficiency but smooths out the power - especially to iPhones and other art devices. Even the Sinewave guys were recommending that for awhile.
Oh, I assumed your light had a light switch. Now I see the need for a switch.
No plan for a cache battery. I expect most of the time to only be charging AA batteries or Li Ion batteries in dedicated battery chargers. Those chargers are full of electronics, but are a lot cheaper than my tablet. I have links to those chargers in post number 4 above. I was thinking if I plug my tablet or a smartphone into it, I would in parallel also charge some batteries to help smooth out the power drain. In post number 6 above I listed the ebay link to a USB voltmeter that I have used to watch my USB voltage, my USB voltages have been rock steady. The only thing that has gone wrong was blowing out some capacitors when I had no load on the system and voltage coming out of the hub climbed too high. I will be adding some zener diodes to drain off any power above 20v that comes out of the hub, hopefully I will quit blowing things with that addition.
I had shoulder surgery in February, doctor wants me to stay off the bike for at least three more months. Thus, my electronics are being developed in slow motion right now.