It's the labor-saving lever and turbine principle!
1. Use glue or double-sided tape to stick the small switch, small motor, battery box and solar panel to the frame plate.
2. The main shaft gear and the motor driven gear are just closely meshed and stuck firmly. The driven gear has a larger diameter and more teeth, so the motor drives the large driven gear more easily and does not require much effort. This is the labor-saving principle of the lever and turbine!
3. Small wires of two colors are used to distinguish the positive and negative poles of each area of the circuit!
4. Insert the axle into the frame plate, close to both sides of the frame, use small yellow circles to fix the axle, prevent the axle from moving left and right, and keep some space for slackvely. !
5. Once the installation is complete, when the switch is flipped to one end, it is power to the battery, and when the switch is flipped to the other end, it is power to the solar panel!