Originally Posted by
noglider
Now that I see there are cheap dynamo type lights that may be decent, ...... Has anyone powered a light intended for a dynamo (A/C) with a battery (DC)? 5V might just do the trick.
a quick note of caution... most/all dynamos are limited to 0.5A output current. The only exception that I know of is the Velogical, and it relies on an external device to nominally limit the current. As such, many dynamo lights utilize this feature to limit current to the LED and the voltage clamping circuit. Connecting this type of light into a power source that can provide considerably more than 0.5A could damage the light.
I'd be interested in hearing from anyone who's dug into the design of current dynamo lights and knows whether this has changed or not.
Steve in Peoria