Hydraulic brake sensor - King Meter

[shemozzle999]

http://www.aliexpress.com/store/product/Brake-sensor-Ebike-brake-sensor-Electric-Bicycle-Brake-Sensors-for-Disk-Brake-or-V-Brake/1514220_32399141501.html

 

[trex]

good find but a bit messy to install though.
You can do same with a simple microswitch inside the brake lever.

 

[shemozzle999]

Yes, but built in systems are better

http://www.hygia.com.tw/prod-brake01-8.html


http://www.hygia.com.tw/gallery-hall.html