A flashlight capable of charging a mobile phone can become a commonly used accessory. We decided to devote this article to a video review on the production of just such a flashlight.
Let's start by watching the author’s video
So, what do we need:
- stepper motor;
- four diodes;
- capacitor;
- two batteries from old motherboards;
- switch;
- the wire;
- LED bulbs;
- housing.
The author of the idea uses a stepper motor from an old printer. This type of motor is unique in that with a small rotation of the shaft, an electric current occurs. This is enough to make a flashlight with the function of charging a mobile phone. Also note that any plastic jar of a long shape can be used as a body.
We make a hole on the side of the case. Also, one hole must be made at the bottom closer to the edge. The large hole is for the motor, and the bottom is for the USB port. We also make one hole for the switch. After that, the case can be put aside and soldered electronic parts homemade.
We take diodes and solder them into a diode bridge.
An alternating voltage is supplied from the generator, that is, the motor, which passes through the diode bridge, which makes the current constant, passes to the capacitor, which in turn filters the current. After that, the filtered voltage should go to the batteries, which should be connected in series. Given that each battery has a power of 3 volts, the total power will be 6 volts. After the batteries, the voltage should go to the wires that are connected to the USB port and the switch. In the first case, it will be charging for the phone, and in the second - lighting the flashlight.
By this principle, while maintaining the polarity, it is necessary to connect all the wires and accessories of the generator flashlight.
Next, we collect everything in the case, thoroughly smearing everything with hot glue.
On the lid of the jar we make a mount for light bulbs.
Finally, connect the remaining wires to the bulbs.
The author also installed one LED bulb in the lower part and connected it directly to the motor. This light bulb will act as a kind of indicator that will light up when the motor shaft rotates and notify you when the batteries are charging.
