Hand-operated self-powered flashlight circuit diagram



In Fig. 1, 1 is a cylindrical plastic skeleton; 2 is a white LED 3 is a circuit board; 4 is a Switch made of copper; 5 is a reserved CR2032 battery position; 6 is an air core coil, inductance About 33mh, the wire diameter is about φ.2mm; 7 is a strong magnet, so that it can move up and down smoothly in the cylinder. 8 is a focusing lens, which is equipped with a rubber sealing ring between the plastic skeleton to make the light more concentrated and has a longer range; 9 is a rubber damping ring to prevent the magnet from directly impacting the plastic skeleton. The upper material is integrated and placed in the right plastic flashlight housing 10. The slide switch 11 of the flashlight corresponds to the copper piece of the circuit board, and the flash cover 12 is screwed on. This flashlight can be used.
We can shake this flashlight up and down. It is constantly glowing with energy. Due to the use of ultra-bright white-emitting diodes and lens focusing, the brightness and range are greater than those of the No. 5 battery flashlight. But this flashlight also has a significant shortcoming, that is, it must be constantly shaken to continue to shine. In order to overcome this shortcoming and save costs, we did not use lithium rechargeable batteries to increase energy storage. Instead, two CR2032 lithium batteries are connected in parallel at both ends of C1. Practice has proved that because the power consumption of this flashlight is about 30mA, the new battery can be used for a long time. When the battery is low, the flashlight can be used for a while. After the battery has completely failed after repeated times, the battery can still continue to work after removing the battery. If your economic conditions permit, it is ideal to replace the battery with a lithium rechargeable battery.

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