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What's the best way to add a battery like device to a dynamo light (lemmy.world)

submitted 2 months ago by coke38@lemmy.world to c/askelectronics@discuss.tchncs.de

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Hello everyone, I bought a bottle dynamo for my bicycle with a rear and front light. Though I have one little tweak that I would like to add and that's a way to keep it light up for about 1 minute (at least 30 sec) without pedaling. I thought of putting a capacitor in the circuit to store some energy but I would like what do you all think of it ?

Thank you for your time and have a nice day you all !

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[–] tia@lemmy.world 1 points 2 months ago (1 children)

Your solution may very well also work, good thinking. A few things to consider though:

Putting capacitors in series requires balancing them
A silicon full bridge rectifier drops ~1.4V frm the input
Incandecent bulbs require a lot of current to get going, this may result in a delay for them to turn on

[–] coke38@lemmy.world 1 points 2 months ago

Ok, I forgot the voltage drop =\ I got LED light so should be fine. What I should do is put your circuit to the test without the capacitor and check if the voltage is low enough for the capacitor to handle ? How should I balance the capacitors ? (Even if I will not take this path, I would like to know)

Thanks again for your help