Led Flashlight Bike
crank flashlight to a bicycle generator?
"I can take apart one of those LED flashlights crank and remove the part that is angled to produce light. and somehow put it on my bicycle wheel and when I pedal on the bicycle tour and charging a 12v marine battery? any suggestions?? because I am not using the battery to power the bike. im using the battery for my boat
Maximum output of generators is only a few dozen milliamps, if - if the battery is approximately the same size as a normal car battery, then the capacity would be about 100 ampere-hours. So would dozens hundreds of hours to recharge. An alternator and regulator of the car is much more appropriate. On the right gear ratio for the alternator pulley can be the diameter of a 10-speed rear tire to the diameter of the alternator pulley, so that a band big enough to fit a pulley more crazy hold on the alternator pulley was reached, and the gears of the bike can be adjusted to their physical capacity. One way to calculate how much you have to pedal - 1) Suppose that the leg of his maximum output of the pedal for a long time to say 1 / 5 hp if you're in pretty good shape, maybe third if you Lance Armstrong 2) Suppose bike / alternator / regulator / battery chemistry net efficiency to be about 50% (sorry, that's the best taking into account losses total) 3) Assuming the battery depletion in 75%, leaving only 25% of the load (this is all there is to go even a deep cycle marine battery) 4) After a minimum energy required, in watts on drums would be the number of ampere-hours of battery times 75 percent times the figure 3600% (seconds per hour) load times 13.5V voltage divided by the efficiency losses of 50% Ex - 100 amp hours * 75% * 3.600 / 0.5 = 540 000 watt-second aka joules Divide that by the constant of 745 horsepower to get seconds, which would be 725. If you are going to kick the 1/5hp, then the time required for azz out would pedal 725 / (1 / 5) = 725 * 5 = 3625 seconds, or a little over 1 hour. ... I think I have every right to .... ... or simply could bridge the battery to the battery of your car while the engine idle for about 20 minutes ....
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