Ask Electronics

3596 readers

2 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 2 years ago

MODERATORS

DavideAndrea@discuss.tchncs.de

linker3000@discuss.tchncs.de

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

submitted 6 months ago by coke38@lemmy.world to c/askelectronics@discuss.tchncs.de

13 comments fedilink hide all child comments

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 !

you are viewing a single comment's thread
view the rest of the comments

[–] coke38@lemmy.world 4 points 6 months ago (3 children)

I should have put the stuff I have, so here you are : Dynamo : https://www.axasecurity.com/bike-security/en-gb/products/lights/7/93903195SC/axa-hr-traction-right Rear light : https://www.axasecurity.com/bike-security/en-gb/products/lights/7/93929195SC/axa-juno-e-bike-6-12v-80-mm Front light : https://www.axasecurity.com/bike-security/en-gb/products/lights/7/92520095SB/axa-nxt-60-steady

Indeed it seems like a great project I think the output is DC though I'm not sure. To be honest I tried to put a capacitor (50V) put it seemed to had no effect (maybe to little capacitance or more probably the coil of the motor should have eaten the storage. Is probably should add a diode to the circuit, am I right ?

[–] lastlighthousekeeper@discuss.tchncs.de 3 points 6 months ago (1 children)

Excuse me if I'm wrong but the description of your front light says in the first sentence: "The AXA Nxt 60 is a dynamo front light [...] with a Steady light function allowing you to have 4 minutes of light when standing still. " Is that not already what you want?

[–] coke38@lemmy.world 2 points 6 months ago

Really good point, though as a stupid human I didn't understood what was the difference between the Nxt 60 steady and the Nxt 60 E bike... Now I know. I don't have this marvelous option =\ explaining why the back doesn't light up either.... Thank you for pointing it out, I couldn't get the article from the site itself so I took another seller and it was not available (it is now)

[–] JaxNakamura@programming.dev 1 points 6 months ago (1 children)

Your typical bike dynamo puts out 6V AC. I bet yours does as well, so that diode sounds like a good idea.

[–] coke38@lemmy.world 1 points 6 months ago

Seems bad so, I have to make a diode bridge rectifier so =\ need to scrap more diode ! Too bad as I wanted to make something small