If you don't mind please give me brief explanation about pmm because I don't know what is a pmm.

Your absolutely right we need a secondary source.We know that electircity is not produced 100% as which is used to run it . To overcome this a secondary source is...

Up to my knowledge i would like to made a new rear wheel system with it self as a dynamo. In brief rear wheel works as a dynamo it self

I am Narendra.I am persuing Engineering.Now i'm in final year,in this we need to do a project. My interest is to design a electric bike.Electric bike is common but my...