1)PMDC (Permanent Magnet Direct Current) motor of rating upto 1KW.
2)A simple multi-meter which is available in the Indian market for 100Rs.
3)A load (bulb, buzzer,another dc motor, etc).I used a 100W bulb.
4)A plastic packing thread or anything equivalent.
The technique is that when u roll the thread on the shaft of the pmdc generator ,all u gotta do is to pull the thread like a top to give it a high speed rotation for a short period.
I first connected a multi-meter to the generator to measure its value and for that u don't need any rope /thread as can be seen in the video but when u have to light up a bulb then , a greater amount of torque is required which can be achieved by a plastic packing thread.
Everything is explained in the video.Please don't forget to watch it. :)
Feel free to ask for any advice if u have in mind.