Getting into e-cycling is a great hobby. It can get people on bikes who might not otherwise be physically able to ride, it can speed up travel time to work and even make pulling a lot of things possible and easy, not to mention it’s fun too. and useful. With that in mind, there is a wide range of conflicting laws about what your electric motor can and can’t do on the road, and if you don’t want to break the rules, you may need to a programmable device that ensures that your e-bike is properly limited.
This design is specifically for Bafang medium drives, which can be up to 1000 W and easily drive a bike above the speed limit, where [Tomblarom] lives. A small microcontroller is housed in a waterproof motor box and is connected between the motor display and the controller. A small living room sensor and magnet sit next to this microcontroller and if the magnet is removed, the microcontroller reprograms the bike controller to limit speed and also deactivate the choke, another feature that is illegal in some jurisdictions but not in others. . As an added bonus, the microcontroller also handles brake lights, turn signals and automatic headlights for the engine.
While project page mentions removing the magnet while it is being pulled to avoid fines and other penalties, it’s up to you We assume this can still be useful for someone who wants to obey local laws when driving on the road, but still wants to remove restrictions when driving on private property or off-road, where restrictions on power and speed may not apply.
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