Switch off rearlight

[Robert Carlier]

My setup is a SON SL hub, a B&M Luxos headlight and a Compass rearlight. The headlight can be switched on/off via the attached remote switch, but this doesn’t switch off the rearlight? I don’t mean the stand-function, where the rearlight will burn for another minute or so. It is constantly on.

Any ideas?

[Virgil Staphbeard]

Did you connect the taillight to the taillight leads on the headlight (assuming the headlight has a taillight hookup)? Or did you connect the taillight to the same wires as the headlight? I.e. hook both up to the same wire coming from the dynamo. If the latter that answers your question, you have it hooked up straight to the dynamo so there is no switch to turn it off. 

[Justus Gunther]

My rear light does the same thing (B&M Secula Plus rear light, B&M Cyo front light) I have mine hooked up to the taillight wires on the headlight too.

On Mon, Mar 20, 2017 at 9:04 AM, Robert Carlier <robert...@gmail.com> wrote:

My setup is a SON SL hub, a B&M Luxos headlight and a Compass rearlight. The headlight can be switched on/off via the attached remote switch, but this doesn’t switch off the rearlight? I don’t mean the stand-function, where the rearlight will burn for another minute or so. It is constantly on.

Any ideas?

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[Ian A]

You could put an inline switch to isolate the rear light when you don't want it to work. It would be difficult to find a switch small enough though. Perhaps break the wire and insert a banana plug that can just be separated when you want to cut power to the tail light. Again not an elegant solution.

The best person to ask would be Anton at Velolumino. He could probably build something suitable even. His work is superb.   http://www.velolumino.com/

IanA

[Kevin M]

I pull a kiddy trailer a lot and would also like a rear light switch.

[Peter Turskovitch]

On Tuesday, March 21, 2017 at 4:19:48 PM UTC+1, Kevin M wrote:

I pull a kiddy trailer a lot and would also like a rear light switch.

I leave a sock in one of the pockets of the trailer, and just cover the light with that.

Not very elegant, but I find these quick and dirty solutions more than appropriate for "dad bikes"

Peter

[Mark Guglielmana]

Maybe I'm missing the point here, but why not just leave it on? 1W LED...

[Ian A]

The OP wanted to be able to switch off the rear light for trail riding, I'm guessing as a courtesy to following cyclists. Another poster referenced towing child/children in a trailer, so wanted to turn the light off rather than shine it into young eyes. I've been followed by a car for some time in the early hours of the morning - I has a battery taillight and turned off all my lights and was able to slip away. The car spent some time looking for me before it took off. It did not have flashing lights on top.

There are reasons to turn off the tail light. A blind like Peter uses in the form of a sock is effective. Battery tail lights are another alternative, but a switchable dynamo light would be useful at times.

IanA

[Harald Kliems]

On Tuesday, March 21, 2017 at 10:19:48 AM UTC-5, Kevin M wrote:

I pull a kiddy trailer a lot and would also like a rear light switch.

May this be a good use case for the Littleford Dyna-Snap magnetic connector? That way you could run a dyno rear light on both trailer and bike, and easily switch between the two (or completely disconnect). http://harriscyclery.net/product/littleford-dyna-snap-connector-5448.htm 

 Harald. 

[Mark Guglielmana]

Pricey, but very cool!

[Zach Roeder]

Know anyone who is good with electronic circuits? I would disassemble the front light & rewire it so that the switch turns the rear light off. It might be as simple as resoldering one wire. Obviously this would void your warranty, but it is a very clean solution.

[Andy Bailey Goodell]

My Topline has a button that seems to turn it off, but I don't think I've ever used it until I get home, so I'm not sure what happens if you continue to ride.

On Mar 20, 2017 4:52 PM, "Robert Carlier" <robert...@gmail.com> wrote:

My setup is a SON SL hub, a B&M Luxos headlight and a Compass rearlight. The headlight can be switched on/off via the attached remote switch, but this doesn’t switch off the rearlight? I don’t mean the stand-function, where the rearlight will burn for another minute or so. It is constantly on.

Any ideas?

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[Jeff Bertolet]

The button on the Topline just discharges the capacitor used for the stand light. Using the button while riding would have no effect on the rear light.

[Robert Carlier]

Figured it out, both lights can be switched on/off via the button. The capacitor will discharge the rearlight offcourse before it will dime. 

from left -> right 

Out + : nothing

Out  - : power rearlight

In  +   : grounding with frame (works well with alu Chris King headset)

In   -   : power from SON

Cheers, Robert

[Brad]

A curious thing about rear lights.
If you come up on a bike with a rear light in your car at night, the light disappears in the light from your headlight.
The reflector doesn't.  Why?  Because the brighter light you supply with the headlights is illuminating the  reflector.
The rear light on the bicycle is a marker light.