Brake Light, Motion Activated

LewTwo

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Apr 8, 2014
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Location
Houston, Texas
Well here is something that I have not seen before:
A bicycle brake light that is automatically activated when one slows down.
That could be useful ... if it actually works.
Motion Detection Brake Light.jpg

https://www.ebay.com/itm/203710387168
 
Oh yeah they work. I have the little round one about an inch diameter, and it works great, and the battery has lasted three years so far. Lives under my rear seat, getting mud thrown at it all day. It works. Its bright. It is sensitive but does not go bright on a false trigger.. it works good like an actual brake light.

Smart lights are cool. So are smart turn signals ( wireless turn signals)... you dont have to go through the wire harness. This is the one I got.

https://www.fenixdeal.com/rockbros-bicycle-smart-auto-brake-sensing-light-ipx6-waterproof-led-charging-cycling-taillight.html
 

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They were bound to happen. Accelerometers became a dirt cheap electronic component. I don't see at all how they would be useful at low speeds like a bicycle travels at. Unless someone behind you only has one eye and no depth perception.

These things would be really useful on cars though. Heavy braking could be detected with an accelerometer and the taillights could flash rapidly. Instead of being solid red whether you just light touch the brake pedal, or your ABS is on.
 
DogDipstick said:
Oh yeah they work. I have the little round one about an inch diameter, and it works great, and the battery has lasted three years so far. Lives under my rear seat, getting mud thrown at it all day. It works. Its bright. It is sensitive but does not go bright on a false trigger.. it works good like an actual brake light.

Smart lights are cool. So are smart turn signals ( wireless turn signals)... you dont have to go through the wire harness. This is the one I got.

https://www.fenixdeal.com/rockbros-bicycle-smart-auto-brake-sensing-light-ipx6-waterproof-led-charging-cycling-taillight.html

This was a great tip! I got one, or a knock off that's a little smaller, and works as advertised. I never need to touch it because it's auto-on feature that activates whenever the bike moves, and the brake light feature works surprisingly well. I saw others that also activate turn signals automatically, but I don't need them, since cars aren't going to pay any attention to them anyway.
 
LewTwo said:
E-HP said:
... a knock off that's a little smaller, and works as advertised.
Perhaps you could post a link ?

Sorry about that. This is the one I got:
https://www.amazon.com/dp/B08HQ4NLD2?psc=1&ref=ppx_yo2ov_dt_b_product_details

The Rock Bros version looks exactly the same, with some cosmetic differences (the serrations around the lens) but I got the other one because shipping was faster:
https://www.amazon.com/ROCKBROS-Rechargeable-Bicycle-Taillight-Waterproof/dp/B09X3391M8
 
E-HP said:
Sorry about that. This is the one I got:
https://www.amazon.com/dp/B08HQ4NLD2?psc=1&ref=ppx_yo2ov_dt_b_product_details
Thank thee :thumb:
 
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