Design of portable battery charger using the pressure generated through motion

[Abbey80]

Can anybody help to put light on how to design a battery charger device using pressure generated through motion

 

[BradtheRad]

It might help to look at the LED flashlights containing a 'shaker' device which will charge a battery (capacitor? supercapacitor?).

I'm pretty certain it consists of a coil of thin wire. A magnet travels back and forth in the center of the coil.
Alternating positive and negative pulses emerge.
A diode (or diode bridge, etc.) rectifies these into DC pulses, to charge the battery.

 

[tpetar]

Can anybody help to put light on how to design a battery charger device using pressure generated through motion

What type of motion ?

 

[Abbey80]

Mechanical motion will be well soothed for this project .I think Mr BradtheRad got the idea of the project but in my area here in Lagos LED flashlight that contain a shaker is not common but can you throw more light on how we can actualize the second option you mentioned.

 

[BradtheRad]

can you throw more light on how we can actualize the second option you mentioned.

Link to explanations, with photographs:

**broken link removed**

http://express.howstuffworks.com/autopsy-shaker-flashlight.htm

You might also be interested in a hand-crank flashlight:

 

[Abbey80]

Mr BradtheRad i really appreciate your link is of great help you will be informed as the project progress thanks