Step 1: Planning:
Step 2: The Options:
1) Dynamo charger plus an Any volt micro step up step down voltage regulator (picture below). On Ebay there are many windup chargers for prices as low as $2.50 shipped.
Advantage:Low cost and easy to buy. Micro Any volt is a great little circuit that can take 2.6-14 volts and step up/down to 2.6-14 volt output.
Disadvantage:Some are poorly made and have bad electronics.
2)Dynamo Charger plus 7805 voltage regulator.
Advantage: Cheap and easy to build.
Disadvantage: Excess electricity is made into heat and has to be dissipated with heat sink. (hot hands?) Have to build a 7805 regulating circuit. (Google 7805 voltage regulator for more information)
3)Dynamo Charger plus USB Car Charger
Advantage: Very easy to build, All parts can be bought locally. Two wire connection
Disadvantage: Cases have to be modified to accept each other
Option one is the best in my option, But due to back orders I was not able to build this model. In this instructable I will guild you to building the easiest of the options, Number 3 and hopefully post the others in a later edition.
For more information about the any volt Micro please visit: http://www.dimensionengineering.com/AnyVoltMicro.htm
Step 3: The Right Stuff:
Searching on ebay I can across a dynamo charger made for black berry cellphone. The Dynamo chargers cost 5 dollars shipping included (Ebay's seller info :Elec.expert)
On a local trip to TJ max I ran across a Griffin USB charger and bought it for this project. This item has great body lines and is very small, that is what sold me on this item . The Griffin Charger can also take a range of power input, so cranking does not have to be at a constant rate. You can use a 7805 Voltage regulator to do the same, but why reinvent the wheel if somebody has already built it for you?
Step 4: The Doctor Says "Open Up"
Step 5: Cutting the Dynamo Case
Step 6: Soldering the Wire and Fusing the Cases
Hint: Use the extra cut plastic as binder to strengthen the bonds between the two cases.
Step 7: Sanding & Painting:
Step 8: Size Matters:
Step 9: The Final Product & Future Plans:
-About 2 minutes of winding increases the power level on my iphone about 1%.
-If you iphone is dead, about 5 minutes of cranking will bring it back to life
Building a wind-up&solar; charger to put in the window at work/home to charge my iphone off the grid. How novel! Having the phone that makes you the most connected but charges with no wire attached.
Please contact me if you have any question comment or fun Ideas!