Questions tagged [dynamo]

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4
votes
1answer
92 views

How can I spin a dynamo wheel at road speed for bench testing?

I can check my dynamo works by spinning the wheel on the workstand or just riding, but I'd like to do some more involved testing. I'd like to develop some custom electronics to use the extra power ...
9
votes
6answers
650 views

Just how bad are bottle dynamos?

My tourer has a dynamo front wheel, which is great. It's so handy* that I ended up using it for most of my commuting over the winter, despite having a hybrid that should serve as my foul-weather ...
1
vote
2answers
200 views

How to choose the light bulbs for a given dynamo

I have a 16V 8W bottle dynamo and two light bulbs: one is marked 6V 0.05A and is working properly other does not have any inscription and ceased to work. I would like to replace the second light ...
2
votes
1answer
83 views

What kind of nut is used on Shimano hub dynamo with rollerbrake?

I tried using the normal cap nut that is also used for my Shimano internal gear hub on my back wheel. The issue I have is that the axle on power side is quite short and the nut does not get enough "...
6
votes
1answer
255 views

On fitting 700C rims to a dynamo hub rated for up to 20"

I am currently in the planning stages of creating a really fancy front fork for my bike. For a little background, I want to try to get this custom built Burrows monoblade with disc mount: https://...
6
votes
1answer
111 views

Dynamo cutting out after a couple of seconds

This sounds like I've an electrical issue, but no idea of next steps. I have a Gazelle Tour Populair with what I believe is a Busch & Müller LYT Lumotec Retro front dynamo-powered light. When ...
2
votes
3answers
571 views

Replacing a normal hub with a dynamo hub

I'm the owner of a Kona Sutra 2017. I'm pretty happy with this bike, but I'm looking to get a dynamo hub for it, with some lights and maybe a charger for my phone. So far I managed to figure out that ...
2
votes
2answers
428 views

Change light switch on Supernova E3 Pure (Specialized AWOL Evo)

I bought a second hand Specialized AWOL Evo a while ago. I have problems with my wrist so I bought it as a last try on dropped bars with the backup plan to change the bars to a flat bar or maybe a ...
2
votes
2answers
366 views

“Right” way to store energy from 2 dynamo hubs

I just bought a recumbent trike, and plan to do a fair amount of long-distance traveling on it, to the point that a dynamo hub seems like a really good idea. I was going to put a dynamo hub on one ...
6
votes
2answers
638 views

Wheel with Centerlock hub for disc brakes and rim for caliper brakes

Does it make sense to build a wheel with a hub with Centerlock for disc brakes and a rim for caliper brakes? My idea is to use the front wheel with a dynamo on two bikes, if I decide that I need a ...
3
votes
2answers
330 views

AC dyno light on battery pack?

I'm running a Supernova E3 PRO 2 of my dynohub. However I would like to use my non-dynohub front-wheel whilst still being able to use the same lights on battery power. The lights have an internal AC/...
1
vote
1answer
125 views

Durability of Seat and Chain Stays on steel frame touring bike

I've been toying with the idea of mounting a dynamo on my REI touring bike. Model is ADV1.1 and it has a steel frame. Dynamo attaches by a mechanism that clamps onto a seat stay and tightens with two ...
9
votes
3answers
900 views

Flashing light when pushing bike with (constant) low speed

When someone pushes his bike beside him in a constant (low) speed the light will not be at constant (low) brightness, instead it will flash with it's full brightness. Why does it work like that?
2
votes
1answer
379 views

Dynamo light without rear light connected?

I wish to repair a faulty dynamo light system however I am a complete newcomer to these systems. I bought an old bicycle with a bottle dynamo ("Vitalux C 6V") connected to the rear wheel. There is a ...
5
votes
1answer
202 views

Has SRAM discontinued i-light hub dynamo?

I haven't been able to find SRAM hub dynamos lately. Has SRAM discontinued making of hub dynamos?
3
votes
1answer
289 views

Are there dynamo powered front flashing lights?

I have a bright battery powered front light and I'm looking for a flashing "be seen" front light that's connected to a dynamo so it's always on whenever I ride. Standlight would be ideal, but isn't ...
12
votes
2answers
2k views

Consequences of driving a dynamo backwards

My bike has a hub dynamo in the front wheel. Recently I have replaced the old fork with a used one I got from my local bike club. The new one has fixing points for the cabling on the other side of the ...
4
votes
1answer
453 views

Dynamo bike lights - unknown short circuit cause

I've bought and installed dynamo powered lights on my bike. A little bit about the setup - It's the bottle dynamo kind pressing against the tire system. The Dynamo produces current turning clockwise ...
1
vote
2answers
155 views

dynamo powered lighting for bike and trailer

Is there wiring diagrams i can look at to get an idea on how to wire up this bottleneck dynamo to my bike and maby trailer. I've been through pages of internet blah but found nothing yet help please?
2
votes
2answers
654 views

Bottle dynamo: the steel wheel quickly wearing down?

4 weeks ago I replaced the bottle dynamo on my bike (see this question). Now, after 4 weeks of commuting for a total of something less than 600 km, the dynamo runner looks like this It won't take ...
3
votes
1answer
188 views

Charging a Garmin Oregon GPS

Does anyone know if you can charge a Garmin Oregon GPS from a bicycle hub dynamo with the optional rechargeable batteries? Thanks Karl.
2
votes
2answers
797 views

Checking that the dynamo hub works

I just bought a second-hand bike for my daughter knowing that the dynamo hub was not working and now I would like to try and repair it. I tested that the dynamo does not produce electricity. I also ...
2
votes
1answer
204 views

Strange dynamo behavior

Some days ago I noticed the light cast from my bike was not steady, despite I was travelling at constant speed. Checking the dynamo when engaged I noticed it was touching on the side of the tire, but ...
4
votes
2answers
394 views

Using trainer as dynamo

I was wondering if it is possible to to use a magnetic trainer as a dynamo. While riding on trainers, at a gym, or at home, I always think to myself, "I wish I could capture all this energy and put ...
0
votes
2answers
376 views

Hub dynamos and standlights

I've been searching for the answer to this for a while now and still none the wiser so trying on here... I've recently bought a second hand hub dynamo and am looking to get some used lights to go ...
11
votes
3answers
899 views

Does anyone make a dynamo light buffer battery that will keep it going at full power?

I have a nice SP dynamo hub and an old Supernova E3 Triple dyanamo light. However, the dynamo light isn't very bright when I'm starting my ride, as my ride has a long hill at the very start, so I don'...
2
votes
1answer
111 views

Installing Schwinn Vestige frame LED cable

I read a post (Daniel and Jennifer) from a couple of years ago explaining that the Vestige frame LED should be replaced if it is no longer working. Thanks for that. Now, I'm seeking tips, a guide or ...
8
votes
3answers
2k views

How to waterproof Shimano dynamo connector?

I have a Shimano DH-3N31-NT hub dynamo with following type of connector: Yesterday, diodes in the bridge rectifier of my front LED light exploded. While I was disassembling the light, I noticed that ...
2
votes
4answers
1k views

Do you need to ride gentler with a dynamo hub?

I am going to purchase a dynamo hub and the way I like to ride is carefree abandon - going offroad, up and down curbs, straight through potholes, etc. My bike is a 90's rigid mtb with road tyres (26")....
5
votes
1answer
844 views

Combining a Dynamo hub with a single speed geared hub setup

In theory, can you build a dynamo hub, say a SON, with a fixie/single speed gear, all mounted in the same hub and wheel? I will be building a touring rig with an extra wheel trailer and I would like ...
4
votes
1answer
143 views

Rim dish and flange angle problem

this is the n-th time I have faced with this problem. The problem is than one flange of the rim is higher than another one. As you can see on the photo. My rim is new this time, I have dynamo hub. ...
2
votes
1answer
686 views

How to replace a bottle dynamo with batteries

I have a bike using a bottle dynamo. It works ok but I just use the light when it's absolutely needed because the dynamo really slows down the bike. I would like to make the bike run with batteries, ...
7
votes
2answers
3k views

How to check your dynamo system?

I just bought my first hub dynamo (Shutter Precision PL-8) with dynamo headlight (Busch + Müller Lumotec IQ2 Eyc N Plus). After installation I figured out that light is not working. How to determine ...
1
vote
1answer
99 views

broken hub dynamo lights 80s Triumph

Trying to fix up my 80s Triumph bike which has a Sturmey Archer 3 speed dynamo hub. The hub has two screws which connect to two cables. I think the hub generates an AC supply and powers a front and ...
4
votes
3answers
6k views

Hub dynamo, maybe loose contact; maintenance?

I experience problems with my Shimano hub dynamo. A few days ago, I stood in the dark, without any visible damage. Measurement prove that the dynamo does not deliver power. I measured DC and AC ...
3
votes
1answer
288 views

What kinda of maintenance does a Sturmey Archer X-FDD DynoBrake hub need?

I have a Sturmey Archer X-FDD dynohub and drum brake for about 2 years. I've riden it about 6000 miles and I don't know if it is due for maintenance or even what kind of maintenance is required. I can'...
2
votes
1answer
218 views

LED headlight eating away at power output of USB charger

I have the following setup: Shimano DH-3N72 hub dynamo cycle2charge.de USB charger LED headlight and taillight, both capacitor-backed The headlight and USB charger are both directly attached to the ...
2
votes
1answer
424 views

Dynamo Lighting Systems

I'm thinking about ways to put a tail light on my trailer (a B.o.B Yak). Our primary use for the trailer is carrying dogs and running errands around town – so I really like the idea of having lights ...
5
votes
2answers
258 views

Dynamo hub cones regulation

I have bought my first dynamo hub wheel with Shimano DH-3N72 hub. The axle of the wheel fells like if it is over-tightened a bit, it rotates with feeling of clicks. Should I loose the cones in the ...
1
vote
1answer
853 views

Connect a classic raleigh dynamo hub to a lamp?

How do I connect a classic raleigh dynamo hub to a lamp please?
4
votes
2answers
1k views

Are any anti-theft GPS trackers dynamo powered?

I am considering an anti-theft GPS tracker for my bicycle, but I am worried about battery life. Are there any that recharge from a hub dynamo?
1
vote
1answer
268 views

SON 28 Hub Dynamo “Rotation Lock”?

I have bought and successfully installed a SON 28 Dynamo Hub and a Supernova The Plug III on my bicycle. However, when the wheel spins, the Hub Dynamo connectors will spin together with the wheel. ...
0
votes
2answers
2k views

Mounting a dynamo headlight to a front rack

I'm using B&M dynamo powered front light (an Eyc and a Cyo) on two of our bikes and currently have them mounted at the fork crown using the stock mounting brackets. This causes a large shadow from ...
3
votes
2answers
1k views

How can we calculate the efficiency of the Siva Cycle Atom generator?

The Atom is a bike electricity generator made by Siva cycle and launched via kickstarter. I was curious about how this generator compares to others (eg. hub dynamo/generators) in the market in terms ...