How to add a brake light to my electric bike?

[newland]

For legal and safety reasons where I live, i am wanting to add a brake light to the e-bike i am building with a BBSHD kit. The brake light will have its own power source.

Option 1: I want to use the bafang brake sensor as the "switch" to engage turn the brake light on. I have a little circuitry knowledge but to be honest I can't come up with the wiring diagram that is needed to create the circuitry.

Option 2: Get a window/door alarm reed switch and ziptie it under the brake lever, to use the magnet? This is option 2 since it will clutter up the handle bars and is just another thing could break and fail.

Has anyone else out there made a brake light for their electric bike?

 

[MaxWell]

Not sure of the name of the circuit you need. I also wanted to add a brake light to my ebike. I ended up going with a CMeilan X5 with the auto brake light option.

Amazon.com : MEILAN X5 Wireless Remote Control Smart Bike TailLight Rear Light Automatic Brake Light with Turn Signal Light USB Rechargeable Safety Flashing light Fits on Any Road Bicycle : Sports & Outdoors

Amazon.com : MEILAN X5 Wireless Remote Control Smart Bike TailLight Rear Light Automatic Brake Light with Turn Signal Light USB Rechargeable Safety Flashing light Fits on Any Road Bicycle : Sports & Outdoors

www.amazon.com

With this unit you can remote trigger the left an right turn signals. The best part is it has an accelerator in it which senses when you are slowing down and automatically triggers the brake light. It also includes lane markers and recharges with a USB cord. The remote uses a CR2032 battery and both the light and remote are easily removed when you are locking up your bike. Sells for around $35.99!

 

[Trevor]

I asked Cyrusher UK . I said before i buy your Ovia do it come with a brake light, Its very important because i will be riding in a group, Yes was the answer i got from then, Also they told me it will be a light and it will brighter when the brakes are applied.. So i got back on to them because my new bike from them had no brake like, They ashed me for photos of the hub connecter and the controller, Turns out ive got a out of date controller with no spare wire for a brake light.. Cyrusher were good they sent me an new controller, Whats the sense in changing the controller that got special Cyrusher plugs.. and no brake to wire too.

 

[addertooth]

Like MaxWell, I cheat. I bought an "all in one" tail light with an internal 2000mAh battery.
It provides:
Blinking tail light with multiple flashing modes.
Emergency flashers.
Blinking turn signals, switched on by a remote on the handlebars.
BRAKE LIGHT that senses the "G-forces" of stopping and automatically turns on the brake light.
Alarm system, which is quite sensitive. Just rummaging through my saddlebags will trigger it, no need to actually move the bike.
The remote is a "twist lock" design. So, you can remove it by giving it a quarter left turn, set the alarm, and put the remote in your pocket as you walk away.

One charge gives me over 80 hours of alarm time. Perfect for a bike you ride to work, set and walk away.
Available at Amazon for $35.99.