Have some fun with your gullible friends and make them think your phone comes with a built-in Solar Panel that allows you to charge your phone. It uses the intensity from the front-facing camera to detect how much 'sunlight' there is and shows the charge amount. Put your hand over the solar panel (and our little secret: the camera or light sensor as well) and let your friends be awed by the drop in charging power.

Note: This app doesn't actually charge your phone! Release notes: v1.2 Now uses the Phone's Light Sensor for a much improved experience! Only shows charging when charge level is big enough. V1.1 Added authentic charge sound and live tile.

This portable USB charger circuit is easy to build. It lets you charge your phone with standard batteries available from any supermarket. Charge your phone with the power of the sun! Start this application, put your phone in a well lit place and watch your battery charge using the solar panel.The creator of this application does not take any responsibility for the.

V1.0 This is where messing with your friends began.

From A little soldering is all it takes to make this cool little emergency cell phone charger. Keep it in the glove box of your car, in case you ever get stranded in the woods and start to hear banjo music! You might be able to find the mini solar panels at a store that sells science or electronics equipment; otherwise you can order them online. Please note, you'll also be cutting the wire on the cell phone charger, so make sure it's not the only one you have! You can often find cheap chargers at discount stores like Big Lots -- it doesn't matter if it's AC or car compatible, since you'll only be using the end that plugs in your phone. MATERIALS: 1 Altoids Tin case 2 Mini Solar Panels (3V 20mA each) 1 Solder (3') 1 Small Heat Shrink Tubing (4') 1 Large Heat Shrink Tubing (4') 1 Double Sided Tape (3') 1oz Flux 1 Solder Iron 1 Heat Gun 1 Wire Stripper 1 cell phone charger Step 1: Step1: Cut Wires & Tubing. A polarity protecting diode should be a MUST when working with a project of this type for safety reasons and to protect the phone.

Everyone makes mistakes and it would be tragic to loose a free or $40 pluse phone over something as careless as reversing the polarity of an under $10 solar charger. However the other posters have made valid points about the rather harsh voltage drop of.7 volts for using these diodes. Therefore I recommend the use of Schottky diodes which only exact a.2 volt drop penalty for their use. A 1N5820, 1N5821 or 1N5822 should be more than sufficient for these needs and would only cost a.2 volt drop. I've used them in voltage regulation applications with an LM-315T voltage regulator where my source voltage was 12 volts and I was trying to get 9 volts out. Download The Battlefield Play4free Extension And Save The File To Your Desktop more.

A.7 volt drop is significant in this application and that's why I reached for the Schottky diode. Dude I built the thing and had to make about 50 of em and let me tell you that solar cells VARY ALOT. Not one of the 100 solar cells was exact as per the specks (I painfully checked each one with my meter a very slow process indeed). I would suggest in purchasing 4 or 5 solar cells and take the highest voltage of the bunch and pair them together, thats what I did. Adea Official Guide To Dental School Pdf Download there.

I had no problem with the voltage being too high because of the low amperage. 7 and 8 volts was optimum for charging a dead cell phone. The ones I build for this demonstration worked but the sun must be bright. Again some worked better do to the large variation in solar cells strength.

Lesson learned, ALL SOLAR CELLS ARE NOT CREATED EQAUL. No voltage regulator is required as far as the ones I built. Keep in mind the price you pay for something, 2 solar cells = 16.50 altoids tin 1.50 = $18.00 thats not including all the tape and solder and heatsrink tubing.when you can already buy on the market wink wink for say $19.00.