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Forum: Electronics, Lighting, & Gadgets

06-11-14, 07:16 AM

Replies: 16

Any recommendations for a laptop or tablet?

Views: 1,921

Posted By darkrider2

If you already have a bike headlight with a 7.4v...

If you already have a bike headlight with a 7.4v battery you can use this USB adapter (http://www.action-led-lights.com/collections/batteries/products/magicshine-mj-6086-usb-adapter) to turn your...

Forum: Electronics, Lighting, & Gadgets

06-11-14, 07:08 AM

Replies: 10

Lupine Betty R or what else if..?

Views: 2,527

Posted By darkrider2

That might depend on your definition of best....

That might depend on your definition of best. 4500 lumens is way overkill. I believe your average car headlight is 1200 lumens. Also, unless you have a lot of air moving over it that Betty is going...

Forum: Electronics, Lighting, & Gadgets

06-11-14, 06:55 AM

Replies: 33

car alternator on a bike?

Views: 5,513

Posted By darkrider2

Sturmey-Archer's hub puts out about 3 watts if I...

Sturmey-Archer's hub puts out about 3 watts if I remember correctly. That's enough to run a 2-300 lumen led light. Even that level of output puts considerable drag on your pedaling. If you want to...

Forum: Electronics, Lighting, & Gadgets

06-11-14, 06:44 AM

Replies: 154

Sticky Best Rear Light for $25?

Views: 81,013

Posted By darkrider2

The problem with all disposable battery lights...

The problem with all disposable battery lights that I have ever seen is that they gradually grow dim in relation to the battery voltage. When using rechargeable batteries they are never quite as...

Forum: Electronics, Lighting, & Gadgets

06-11-14, 06:20 AM

Replies: 11

Any Front Lights That Can Be Mounted On A Stem?

Views: 8,997

Posted By darkrider2

Gemini lights can be rotated on their mount so...

Gemini lights can be rotated on their mount so you can place them on the front (fork) tube of the frame.
The headlight mount...

Forum: Electronics, Lighting, & Gadgets

11-11-10, 10:49 PM

Replies: 77

GeoMan Halts MagicShine Sales Due To Faulty Battery Packs

Views: 5,771

Posted By darkrider2

Some of what I am reading about rebuilding...

Some of what I am reading about rebuilding MagicShine packs is scaring me. Li-ion packs are a bit of rocket science. First, the MS packs do have a balancing circuit in them that assures each pair in...

Forum: Electronics, Lighting, & Gadgets

10-18-09, 05:32 PM

Replies: 906

Has anyone tried the Magicshine 900 lumen?

Views: 76,485

Posted By darkrider2

There can be big differences in the efficiency on...

There can be big differences in the efficiency on the driver circuit. I have been testing flashlight drivers as part of my work and find some as high as 92% and some as low as 60%.

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