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File: bike dynamo.png (1.83 MB, 1281x960)
1.83 MB
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I really want to put a dynamo on my bike but I'm too afraid that other cyclists will laugh at me for not having an LED light.
Am I just a dumb hipster who can't get with the times or is there still an active community who uses these?
>>
>>1646767
It would make sense to use an LED with the dynamo too though.
>>
Hub dynamos are more popular. Though you can still get new bottle dynamos fairly cheap.

https://www.bike24.com/search/category-67?searchTerm=dynamo
>>
>>1646767
You should ask the people you ride with if they’ll laugh at you
>>
Dynamos don't generate a lot of power, and most of the headlights are capped at 2.4W. Most of the LEDs in use are probably rated at no more than 100 lumens per watt (certainly in cheaper lights). So you have a light that is at most 240 lumen. With a good lens design a lot can be done with that little amount of light.

Battery lights absolutely crush dynamo lights in pure power. But few have a really good lenses, many are essentially just flashlights. Multiple LEDs can compensate for the hot spot you get on single LED lights, but they aren't friendly to other road users.
>>
I've never ridden a bike with a dynamo, does it feel noticeably heavier? or is it basically "free"?
>>
>>1646827
a modern hub one is like 5-10 watts of drag
most reasonable cyclists can do 200-300 watts for an hour
casuals probably more like 100 watts.
it's also maybe 500g, or less, extra weight.

It's not nothing, but it's pretty insigniciant.
>>
>>1646827
I grew up riding bikes with those; they fucking suck. Also when you pedal slow for whatever reason the light dims and flickers.
The best is when you're climbing hills, because you can feel the thing dragging you down AND the light doesn't work properly.
Basically, they're shit and OP is a "dumb hipster"

Disclaimer: I have no experience with hub dynamos, maybe those are better. I know Nips equip new mamachari bikes with them, although I'm 100% they at least have LED lights. Using incandescent in 2021 is 0 IQ.
>>
Interestingly, there are "frictionless dynamo micro lights" available now that go on top of your brake pads and run off the rim, that even have a functional "brake light" which brightens when you apply the brakes.
https://www.magniclight.com/
>a magnetic wheel in a generator separated from the bicycle rim by a narrow air gap induces temporary magnetic fields even in non-magnetic aluminium bicycle rims when the bicycle rim is moving. This leads to the magnetic wheel rotating contactlessly as if by magic.
Pretty neat stuff.
>>
>>1646827
Most decent dynohubs are unnoticeable at normal riding speeds. You'll notice the difference between wearing a big baggy shirt that catches the wind vs. a tight shirt before you notice the hub drag.
>>
>>1646767
I use it because it came on the bike and I don't want to change the groupset by swapping the hub or something like that. I used to use battery ones but I can't be bothered to carry them around all the time.

On performance - yes you notice them very much (at least the old ones). The faster you go the more drag you will feel as well.
>>
>>1646838
wow way to out yourself as a poorfag and a casual
>>
>>1646929
Thank you for contributing to this thread
>>
>>1646942
no, thank (you)
>>
>>1646913
yeah but I rarely ride at night anyway so it's not like it will be bothering me for long
>>
Tunturi Retki 5/5
>>
>>1646827
>>1646829
>>1646907

cool, thanks guys
>>
https://fahrradzukunft.de/18/labortest-felgenlaeuferdynamos/
The velogical ones look good. It's a German website so use google translate

Apart from that nobody will laugh at you. Everyone who's riding not only on the weekends knows that charging the light sucks. The peace of mind that you will never run out of juice is nice.
>>
>>1646767
>dynamo
you'll destroy your tire, kid.
get a generator hub front wheel
or better yet just get a USB rechargable LED headlight and forget all this old stuff.
>>
>>1647317
frictionless electromagnetic hub dynamos are more modern than battery lights
>>
>>1647328
higher tech sure, but they still suck watts and can't get you the same kinda brightness a $50 rechargable light can
>>
>>1646856
This is literally how every electric generator in existence works, they just cracked it open and threw each of the parts on a different location
Yeah, “frictionless” just like your alternator
>>
>>1646767
Swap out the bulb. You can get LED bulbs that fit in there and if it's a dynamo you don't need a rectifier.
>>
>>1647317
>kid
Wow, it's like you started sucking cocks the minute you were born.
>>1647738
>“frictionless” just like your alternator
Alternator is run by a belt. Those literally don't touch the rim.
Are you mentally disabled?
>>
>>1647866
What does the belt turn anon
>>
>>1647328
They're limited to 6 watts AT MOST, and they only deliver current when you're moving so your light stops working when you're stopped.
Get a USB rechargable light and stop fooling around.
Get a USB rechargable taillight while you're at it.
>>
>>1647866
Thanks so much for allowing me to live RENT FREE in your dome, KID.
>>
>>1647923
your meds, schizo
>>
>>1647922
https://youtu.be/NNW3mIE3h7w?t=111

high quality dynamo light output is like 90 lux which is pretty good
look at the beam pattern in that video and realize it's probably superior to what you're used to.

they also don't shut off when you stop, they have like a capacitor thingo and stay on for a couple minutes at reduced brightness.
>>
>>1646771
>hub gens always draggy
>tire dynamos, power when you need it
>>
>>1647957
But the power is practically nothing, the best plan is a hub dynamo and a nice power bank to charge your LED lights when they die
>>
/n/ has retarded autism again. Get a hub dynamo if it makes sense for the bike; something like a commuter that’s almost always going to want lights on and is ridden nearly every day or a bike that is going to see lots of nighttime riding with no opportunity to recharge your lights a la touring and randonneur bikes. If you’re just a weekend warrior don’t bother with a dynamo, just get rechargeable lights. I have bikes that utilize either system of lighting and I’m not screaming at myself about the merits of each one.
>>
>>1646767
I think they are cool,
>>1646769
I'm gonna mod mine too do that incadecent is just too dim
>>1646827
Yeah, I only use mine going down hill, mine is old though, might be able to put a capacitor in line with the bulb to get an even light, not just with every push
>>
>>1646767
Hub dynos are just a status symbol for urban yuppies who never park their bikes outside because each pedal is worth like $120 let alone the front wheel and they don't ride far enough to drain a battery but they heard europeans love dynos so of course they HAD to get one
>>
>>1648216
Almost all of the Mennonites I know have dynamo hubs
>>
>>1648229
>Mennonites

Why mention that, is there a thing of menonites biking? Enlighten us.

>>1648216
they are loud and dont work consistently since tire flexes, suboptimal technology but far more simpler than a hub dyno (hub dyno might have less friction but never tried it - cant have more than a dynamo)
>>
>>1648235
A lot of Mennonites aren’t allowed to own cars so they either ride bikes or use horse buggies to get around. They’re the farthest thing you can get from an “urban yuppie”, just about everything they do own serves a practical purpose.
>>
>>1648236
>A lot of Mennonites aren’t allowed to own cars

I like their music a lot

https://www.youtube.com/watch?v=viHC3GBdGiM

I know that Amish arent allowed to bike, but I wasnt aware that Menonites cant own cars, isnt the guy who runs wheelfanatyk . com Ric Hjerberg a Menonite?

>just about everything they do own serves a practical purpose.

based no nonsense
>>
>>1648240
Some Mennonites can own cars, as far as I understand it all depends on which church you belong to regarding what is and isn’t allowed.
>>
>>1648240
I'll bet their pussies are hairy as fuck
>>
>>1647929
Nope. Rechargeable lights are god-tier, kino, GOAT compared to everything else.
>>
>>1647926
Schizo is having some shitty 100 year old thing ruining your tire, or having a shitty heavy front wheel with a shitty expensive dynamo hub. If you think these are okay then you're the one who needs meds not me. Meanwhile I just recharge my lights and DGAF, they JUST WERK and I never have to worry about them.
>>
>>1649119
>Meanwhile I just recharge my lights
>I never have to worry about them.
Sounds like you do though hahahaha
>>
I've had a Shutter Precision hub and a Phillips Saferide front and back light for like a decade now. Of all the parts of my bike those lights have been the most reliable; they keep working forever. They're like motorcycle lights: just part of the bike, always on when they should be on, throw the right amount of light everywhere I need it, no thinking or hassle required. A USB rechargeable might have more power but it would probably have a shitty round beam and would usually be dead when I needed it because I've got other things to do than uncliping it and bringing it in all the time. If you're some sort of nighttime downhill sport-o maybe it makes sense. If you're an asshole with the annoying blinking you'll need batteries too. If you're looking for a casual car replacement go with the dynohub.
>>
>>1649249
The blinking is for cagers to see and riding in traffic
>>
>>1646769
That would require more electronics because LED wants DC and specific voltage. So you'd be pedalling to charge a big capacitor that would power the LED. The whole point of a dynamo is that you can literally generate AC from the crankshaft and send that straight to the bulb.
>>
>>1649260
um wut
all the modern dynamos run led lights
>>
>>1649263
At that point you aren't really "running" the lights, you're basically just charging up a battery, so you might as well just use a battery since it will be more efficient to pedal a battery around than waste all that energy in converstion.
>>
>>1649264
but the modern dynamo systems are WAY more efficient and good

this isn't making sense anon
>>
>>1649265
Efficient for what? A human is not a very good generator of power compared to a battery so the losses you would incur are larger than just carrying the extra weight of the battery with you.

At least with old style dynamos you have the advantage of simplicity and reliability (as long as the bulb lasts) since they need very little electronics.
>>
>>1649267
>Efficient for what?
generating light you fucking retard.
I feel like you often bring this kind of demonstrably nonsense position backed up by abstract theoretical cope logic that I don't care to understand.
>>
>>1649268
You can't generate DC from a bicycle, so you have to generate AC and then rectify it, then charge a capacitor, then step down the voltage, then feed that into the LED. This is much less efficient energy-wise than simply carrying a modern Lithium-Ion battery with you.
>>
>>1646769
>It would make sense to use an LED with the dynamo too though.
this is what we're talking about. Not my post.
>>1649260
>That would require more electronics because LED wants DC and specific voltage. So you'd be pedalling to charge a big capacitor that would power the LED. The whole point of a dynamo is that you can literally generate AC from the crankshaft and send that straight to the bulb.
this is your reply

>>1649271
so, what is it you think we're talking about? Battery lights vs dynamos?

I thought about it and get what you're saying now about LED and ac vs dc but the conclusion you draw is absolute nonsense. I'll also add the obvious beniefit of having a capacitor in the system is that the light doesn't turn off when you stop which is vital for practical use.
>>
>>1649272
The advantage of old dynamos over modern lighting systems is their simplicity and that there isn't really much to go wrong. Maybe the bulb blows up, but you can replace that easily.

Once you start adding a ton of chink electronics which is needed for LEDs you throw that advantage away, so you might as well just use a battery.
>>
>>1649274
No. The advantage is price. A high end modern system, Schmidt etc, is not complicated whatsoever to the user and has god tier reliability. There is nothing that ever goes wrong.
>>
>>1649277
If you want reliable capacitors and voltage regulators etc then the price goes up, so all you save is the cost of the battery and charging it which will probably be outweighed by the cost of extra food you eat charging the thing with your legs.
>>
>>1649279
what did i just fucking say dude...
>>
>>1649281
I'm not following you at all.
>>
>>1649277
>The advantage is price
>>1649282
what confused you about that
>>
>>1649283
If you want reliable capacitors and DC regulators then they will cost more money and still be much less reliable than a dynamo.
>>
>>1649284
I'm asking you why you feel the need to reply to me saying a good modern system is expensive, after i've already said that?

As for it being less reliable, what are you talking about? A DIY system? Maybe. A Schmidt system? No. You're just wrong if you think that. Complexity beyond the absolute minimum does not always bring lack of reliability. Your theoretical grasp on this is irrelevant compared to reality.
>>
>>1649285
> The advantage is price
> A good system is expensive
> A system with hundreds of small components is more reliable than a system with a handful of components

No. You don't know what you're talking about. The weakest link in an old dynamo system is the bulb, and that is easily replaced unlike anything in a modern system. So if you're going to pay that price anyway, just use a fucking battery.
>>
>>1649287
Seeing as you've clearly never used a schmidt system or talked to anyone about one.
Do you not think it's theoretically possible for something which is marginally complex, to be well enough engineered with high enough quality to be more or less totally reliable? Numerous components on a car for example, which you might reasonably expect to last trouble free for 200,000 km or decades, or many types of electronics, or a high quality watch.

As for
>just use a fucking battery
Sure, most people should, especially if on a budget. I don't understand why you can't get your head around the advantage of never having to think about charging a light (and headlights require frequent charging)
>>
>>1649287
also, well, the bulb on an edelux isn't prone to fail. That's just reality.
>>
>>1649288
>Do you not think it's theoretically possible for something which is marginally complex, to be well enough engineered with high enough quality to be more or less totally reliable?

No, not at all. Spend any time studying DC regulators. They are far and away the least reliable component in most consumer electronics.
>>
>>1649290
I feel like you often bring this kind of demonstrably nonsense position backed up by abstract theoretical cope logic that I don't care to understand.
>>
>>1649291
It's really quite simple physics and engineering, not my fault you are a brainlet I guess.
>>
>>1649292
it's easy for smart people to convince themselves of nonsense ideas.
>>
>>1649294
Go on then, what "idea" is nonsense?
>>
>>1649295
that high end modern dynamo systems are bad
>>
>>1649288
>I don't understand why you can't get your head around the advantage of never having to think about charging a light (and headlights require frequent charging)
Clever anon ignoring this bit in his reply
>>
>>1649310
Utter retard
>>
>>1649124
>he can't be bothered to plug in a cable when he gets home
Zoomers, why do you have no attention span?
Why can't you be bothered to be responsible for even simple things like plugging in your headlight and taillight so they're charged for the next time?
Do you need a Mommy to remind you or something? LOL.
>>
>>1649249
>because I've got other things to do than uncliping it and bringing it in all the time
Oh well it's just such an imposition on your oh-so-valuable time, what with saving the world on a daily basis, to spend 60 seconds bringing in pesky lighting and plugging a cable into them to recharge then, MY BAD!
*eyeroll*
You Zoomers are ridiculous, eternal children.
>>
>>1649260
I serioulsy doubt that any of these dynamo/LED combos have current-limiting buck-boost switching regulators necessary to properly supply a white LED, they probably just rectify it and run it direct and who cares if it overcurrents the LED and it burns out in a few years, amirite?
>>
>>1649519
>>1649521
55 year old boomer is that you lmao you crusty old retard how are you doing hahahaha
>>
>>1649522
You can use a resistor to limit current but this is less efficient and you need to size it with the voltage of the dynamo which will be highly variable. What you need is a capacitor to buffer voltage changes and a regulator so you have all the same parts as a battery operated system, with probably some extra for the dynamo itself.

An old school dynamo OTOH is a very simple system, you can probably make do without any regulation at all if you can live with the bulb flickering. Literally some coils, a magnet and a bulb, you could make one from scratch as a school project.
>>
>>1649522
My Busch & Müller headlamp has been running fine for 8 years. Why do boomers cope so hard about things they don’t understand?
>>
>>1649545
>running fine for 8 years
How standards have fallen
>>
>>1649556
Standards for what? Telling the truth about how long I’ve owned something? Go cope somewhere else you battery huffing turd.
>>
>>1649558
longevity
>>
>>1649561
I’ve had to replace rechargeable lights in that time due to their batteries crapping out. I’d say the dynohub and associated lights are doing pretty good for longevity.
>>
>>1649563
Yes, it applies in either case. Non replaceable batteries should be banned.
>>
>>1649521
That guy here, and I'm a solid genXer. Not that I'm all that busy but convenience is a real thing. Having a pedal powered vehicle be, you know, pedal powered also has a certain aesthetic purity; if I wanted a rechargable bicycle I would have one.
>>
>>1649522
I'm pretty certain mine has exactly that. It would need some sort of power conversion to run the capacitor and the brightness doesn't increase at high speed. Mine has outlasted most other components on the frame.





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