Instructables

Pedal Powered Mobile Charger

video Pedal Powered Mobile Charger
Do you love riding a bike ? Now get a new target for yourself,  make sure you burn your calories and charge your cell phone at the same time. This is a detailed instructable to guide you through the making process. Enjoy.
EmcySquare10 months ago
great explanation of the circuit ! thanks a lot
http://www.youtube.com/playlist?list=PLJvxAWcSgY-AuJY8MwzAIyJpLpcBZDhvv
Wow, I think this one has my vote. One question tho, what do you use to keep your battery from over charging? I know that phones have an internal "Shut off" switch once it is fully charged, I'm just wondering if the phone will automatically "Stop charging" the same way that it does when plugged into a solar panel or the wall.
Thanks. Yes, it should "Stop Charging" the same way. Because the wall charger does not have any role in that. The "Stop Charging" mechanism is in your phone and should work the same way.
Thanks. Yes, it should "Stop Charging" the same way. Because the wall charger does not have any role in that. The "Stop Charging" mechanism is in your phone and should work the same way.
robu_com1 year ago
please tell me how do i know which wire is positive within the mobile charger when i cut it.. rohanb@enelek.com waiting for your reply.. :)
alpesh.vitha (author)  robu_com1 year ago
here is the diagram
dyno.jpg
alpesh.vitha (author)  robu_com1 year ago
okay - let me tell you another trick.. Suppose you cut the two wires at point A and B. Now you have got 4 ends. []= =[] say, A was cut into A1, A2 and B is cut into B1,B2. (remember to mark the ends properly). Have a look at my diagram. Connect the charger to the power and measure the voltage across the two ends A1,B1. (Assuming you connect positive lead of voltmeter to A1 and negative lead to B1) if you get +5V in the reading, it means A1 is positive and B1 is negative. Hence A2 should be connected to Positive and B2 to negative. Conversely, if you get -5V in the reading, the A1 is negative and B1 is positive so A2 should be connected to negative and B2 to postive. I hope this explains. Feel free to ask me if you have further doubts.
bhooper71 year ago
Really enjoyed your video and the explanation of the circuit. Great Job