Dynamo flashlight from a stepper motor

Dynamo flashlight from a stepper motor
Now a lot of digital technology fails, computers, printers, scanners. Time is - the old is replaced by the new. But the failed equipment can still serve, although not all, but its individual parts are for sure. Here, for example, stepper motors of various sizes and capacities are used in printers and scanners. The fact is that they can work not only as engines, but also as current generators. In fact, this four-phase current generator is already there. And if you attach even a small torque to the engine, a much higher voltage will appear at the output, which is enough to charge low-power batteries. I suggest making a mechanical dynamo flashlight from a stepper motor of a printer or scanner.

Making a flashlight

The first thing to do is find a suitable stepping motor of small size.Although, if you want to make a flashlight bigger and more powerful - take a big engine.
stepper motor
Next I need a body. I took ready. You can take soap trays, or even glue the case yourself.
Case
Making a hole for the stepper motor.
Dynamo flashlight from a stepper motor
Install and try on a stepping motor.
Dynamo flashlight from a stepper motor
From the old flashlight, we take the front panel with reflectors and LEDs. All this can of course be done by yourself.
Dynamo flashlight from a stepper motor
Cutting out the groove for the headlight.
Dynamo flashlight from a stepper motor
Install the light from the old flashlight.
Dynamo flashlight from a stepper motor
Make a cutout under the button and set it into the groove.
Dynamo flashlight from a stepper motor
We place a fee in the free area,where electronic components will be placed.
Dynamo flashlight from a stepper motor

Flashlight electronics

Circuit

In order for the LEDs to light, they need direct current. The generator produces a variable, so you need a four-phase rectifier that will collect current from all motor windings and concentrate it in one circuit.
Scheme
Next, the resulting current will charge the batteries, which will store the received current. In principle, you can do without batteries - using a powerful capacitor, but then the glow will be only at the moment of the generator torsion. Although there is another alternative - to use an ionistor, but it will take a long time to charge it. .
Dynamo flashlight from a stepper motor
Dynamo flashlight from a stepper motor
All parts of the flashlight are ready for assembly.
Dynamo flashlight from a stepper motor

Dynamo assemblyflashlight

Attach the board to the screws.
Dynamo flashlight from a stepper motor
Put the stepper motor and solder its wires to the board.
Dynamo flashlight from a stepper motor
Connect the wires to the switch and the spotlight.
Dynamo flashlight from a stepper motor
Here is an almost assembled flashlight with all parts.
Dynamo flashlight from a stepper motor
Completely closing the case. A “G” -shaped handle is attached to the generator wheel, for which the user will rotate the motor shaft.
Dynamo flashlight from a stepper motor
What a finished flashlight looks like.
Dynamo flashlight from a stepper motor
This is how it shines.
Dynamo flashlight from a stepper motor
It is quite enough energy to charge miniature batteries. The whole structure is small and easily fits in your pocket. This flashlight is good because even having lain for years without exploitation, it can earn in few minutes again.


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