The black disk of electric vehicle power sensor is a magnetic disk, and the module with cable is a power sensor. The cable consists of three cores, namely 5V power supply (red line), grounding (black line or yellow line) and signal output (green line or blue line). These three wires can be connected with handlebar wires of the same color or function.

The sensor and the disc are installed on the right side of the central shaft, wherein the sensor is installed on the outer frame of the central shaft and fixed by a magnetic cap, and the disc is installed on the central shaft. In this way, when assisted by human feet, the disc rotates with the central axis, which is detected by the sensor, and then amplified and shaped by the module to form a pulse auxiliary signal.

Precautions for the use of electric vehicles:

1. Buy and use qualified electric bicycles, chargers and batteries produced by regular manufacturers, and maintain them regularly. Unauthorized modification is strictly prohibited.

2, electric vehicles should be parked in a safe place, it is strictly prohibited to park in the stairwell, evacuation routes, exits, and shall not occupy the fire truck passage.

3. It is forbidden to charge in corridors, stairwells and evacuation passages. Charging should be carried out outdoors to ensure that there are no combustibles around, and try to charge at a centralized charging point.

4. In summer when the temperature is high, try not to use the electric car continuously for a long time, in case of circuit failure and fire caused by factors such as high line temperature and motor heating.