Mmmmm interesting !
I think I got something for ya, it is said to not use ANY body power !
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Calculate the time knowing that the capacitance of 1F means current flow of 1A for 1 second.
Ahh thanks ! I was looking for an easy formula to get a good idea of the time of discharge for the power taken !
That would mean a 600F would last around 900ish second if I got this right ... pretty damn good. ( 600F / 0.650A = 920sec )
600-650mA which seems like to be the most current my dynamo can output - according something I read. I got no confirmation of this however.
From the 1-5F 5V5 cap (that you can easily find) you should get ~20-60sec of blinking .. (assume front light is off)... if you want front one to light too, then you have to go much larger cap's and IMHO that's stopps being feasible.
Mmmm ... well in theory it seems feasible, even though it might be bit more expensive then I originally thought. I'll have to check this out - maybe I can build the circuit with a cheaper smaller cap and see if it works before investing.
The thing is if I need to buy 2 X 40$US cap, I DID finally found some powered by dynamo LED + standlight ( with a capacitor ).
They are starting at around 100$bucks however, the good ones. The cheap ones only have a very cheap LED while standing ( powered by the cap ), making it enough to be seen - but not close to be enough to light the road.
So I'm gonna stick with the idea of building a cheap one I think, I just ordered a 10$bucks PowerBeam flashlight, very cheap light that I'll feel free to test my things and figure the circuit. ( Even though I know it's quiet simple, just of matter of doing it safely ).
You tell me that I could put 2 of those 2.5V cap and basically make a 5V cap with them ? I wasn't sure if that was possible, since I know that capacitors in series is the same a resistor in parallel for the formula.
I attach an image for my question this time...
Basically, would that mean that those 2 circuits are the exact same, and so will behave the same way ?
Don't bother about the circuit, but only the caps... I just picked the first circuit I fell on.
If yes, it would probably be the easiest solution, however 40$US bucks for each cap is bit more I expected, so I'll have to check, because I don't want to sacrifice brightness for the cost either, but it's almost the cost of a good Dynamo lamp at that point :
Busch & Mller Lumotec IQ Cyo R senso plus with near field illumination (175QRSNDi)
I finally found that model, much more reasonable price than the Supernova E3.. Still over 100bucks though - but my "mini project" cost is getting closer also.
I assume this LED light has a smaller cap however, since I have a hard time beleiving there is a 500Farad in there, and they only mention it takes 3 min of riding to fully charge it - but can't find anywhere how long it will last powering the light.
I also found this website :
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Which seems probably the best website to compare the different Battery/Hub and Bottle dynamo Headlight. ( If anyone is interested )
Whatever I do I'll have to wait for my cheap LED Headlight I ordered and try my stuff from there, hoping I'll figure something not too expensive
So what about those circuit .. ? Circuit A = Circuit B .. ?
Thanks a lot for the pricing Boncuk ! I think I'm gonna check if a 100Farad 5.0V would be cheaper, I think I saw 1 on the WIMA website !