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Questions tagged [dynamo]

A dynamo converts mechanical energy to electrical energy.

A dynamo or generator converts mechanical energy to electrical energy. On a bicycle, this can power lights or other equipment without charging or exchanging batteries.

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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 fork. Because the hub has only one connector for…
antipattern
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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 commuter. So I'd quite like to add a dynamo to the…
Chris H
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Output of a Hub Dynamo measured with an Oscilloscope

What signal do you get from a hub dynamo when measuring it's output with an oscilloscope. Please include information on load and setup.
gschenk
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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 the wires inside of the connector were more than…
AndrejaKo
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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 starting to move the light comes on, but quickly cuts off…
eoinoc
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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"). I like to do pretty much everything on this…
lazyrabbit
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Problems installing front and rear Busch and Muller dynamo lights to a shimano hub dynamo

I connected the Front Dynamo Light (Halogen Busch & Muller Lumotec Oval Senso) to the Shimano hub dynamo and it worked fine. I then connected the Busch & Muller D Toplight Plus Rear Carrier Dynamo and got nothing from it. In addition the front…
Bryn
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Which model of hub dynamo does the Cube Nuroad Race FE have?

I own a 2020 Cube Nuroad Race FE bike. Do you perhaps know what model of hub dynamo this bike has or at least if it's AC or DC? I can't figure it out since there are no markings on it. Here are a few images of the hub dynamo in question:…
Dusan
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Rear stand light on a Cube Nuroad FE not working

I bought online a Cube Nuroad Race FE 2021 that comes full with fenders and dynamo lights. The front light is the Supernova E3 Pure and, although not stated clearly on Cube's site, the rear light should be Cube Pro-D dynamo mudguard rear light that…
Kostas
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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 of efficiency. Quoting from the siva cycle…
cyclicredundancy
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Front and rear lights not working properly when both connected to dynamo

On my bike I have a bottle dynamo rated at 6V 3W. It has two connectors, + and ground. My front light is an AXA lamp that I'm not sure of the model, but is very similar to an AXA Pico 30. It has a switch on the back (on/off, if I remember correctly…
IceCreamFan21
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Dynamo Rear Light Problem

UPDATE Dear All, thank you for replying. Very helpful information in there. I have taken more photos as requested. Some answers to the questions, in order of comments. I tried to draw a wiring diagram but I am plain rubbish at doing it. The basic…
daveinberlin
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How should I finish the dynamo cable connection from SON coax to an SP connector?

Connecting a SON coax cable to an SP (Shutter Precision) Dynamo "lego brick" results in exposed wire. How should I protect this and tidy it up? Second question: how do I know the wires have been put the correct way round?
sdgfsdh
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How to install dynamo hub into mtb

I have a roval carbon wheel on specialized epic hard tail. I want to install son dynamo hub on it. I've seen it done on https://bikepacking.com/plan/lael-wilcox-2019-tour-divide-gear-list/ (SON 15mm thru-axle hub / Roval carbon rim) Although I don't…
eugene
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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 verified that the positive contact wire is always…
savedario
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