Introduction of two types of self-generating flashlights

1. Energy-saving product, built-in micro power generation system using Faraday principle, just press the power generation handle lightly, it can power the LED light source, and also store the electric energy inside the system. There is a switch on the side of the product, when it is turned on, the electric energy stored inside the product will power the LED light source, and the electric energy generated by pressing the power generation handle for 15 seconds continuously can keep the LED light source glowing continuously.

2. Environmentally friendly: no external power supply or battery is required.

3. Easy to use: The power generation handle can be stored inside the product. There is a switch at the end of the product to lock the handle inside the product.

4. Long life: The life of LED lamps can reach 100,000 hours. It is a must-have for home, car, camping, etc.

Hand crank self-generating flashlight

The circuit principle of the hand-cranked self-generating flashlight is shown in Figure 1. Its structural diagram is shown in Figure 2. When using the flashlight, the magnet 7 is moved up and down by shaking the flashlight, and electric energy is generated through the coil 6, which is then rectified by D1-D4 in Figure 2, and the energy stored in C1 is charged to the battery CR2032. The white light emitting diode is controlled by the switch to emit light to realize the function of self-generating.

In Figure 1, 1 is a cylindrical plastic frame; 2 is a white light emitting diode; 3 is a circuit board; 4 is a switch made of copper sheet; 5 is a reserved position for CR2032 battery; 6 is an air-core coil with an inductance of about 33mh and a wire diameter of about φ.2mm; 7 is a strong magnet that should be able to move up and down smoothly in the cylinder. 8 is a focusing lens with a rubber sealing ring between it and the plastic frame to make the light more concentrated and the range longer; 9 is a rubber shock-absorbing ring to prevent the magnet from directly impacting the plastic frame. Put the above materials as a whole and then put them into the plastic flashlight shell 10 on the right. The slide switch 11 of the flashlight corresponds to the copper sheet of the circuit board, and then screw on the flashlight cover 12. This flashlight can be used.

We can shake this flashlight up and down. It can emit light continuously. Because it uses super bright white light diodes and has lenses to focus, the brightness and range are greater than the flashlight with AA batteries that only use focusing diodes. But this flashlight also has a significant disadvantage, which is that it needs to be shaken continuously to emit light continuously. In order to overcome this disadvantage and save costs, we did not use lithium rechargeable batteries to increase energy storage. Instead, we connected two CR2032 lithium batteries in parallel at both ends of C1. Practice has proved that since the power consumption of this flashlight is about 30mA, the new battery can be used for a long time, and when the power is low, shaking the flashlight can be used for a while. After repeated repeated failures of the battery, it can still continue to work after removing the battery. If your financial conditions permit, it is ideal to replace the battery with a lithium rechargeable battery.