Toy Motor Lighthouse | Kannada
Channel: Arvind Gupta
Date: 25/01/2016

As you crank the handle an LED glows like the beacon of a LIGHTHOUSE. To make this Lighthouse you need a 6-volt Toy Motor, LED, old DVDs. Screws / Nuts and some other simple materials. To make the BIG Pulley you will need two old DVDS, a corrugated box disk and rubber glue. Apply glue on the DVD, let it dry and then stick the smaller corrugated cardboard disc in its centre. Then apply glue on the cardboard disc and stick the second DVD on top of it. This will make a big pulley with a groove. Stick steel washers on both DVDs as shown. Make a midway hole in the DVDs and fix a long screw with a nut for the Pulley Handle. Place a loose screw through the centre of the Pulley. Weave a Sewing Machine Bobbin on the other end as a Spacer. Place the screw in the vertical arm of the Wooden Stand. The Pulley must spin smoothly on rotating the handle.
Connect a LED to a 6-volt Toy Motor. Fix a small pulley on the Motor Shaft. On spinning the shaft the motor will generate current and the LED will light up. Mount the Motor-LED assembly with a clamp on top of the wooden arm. Finally connect the small pulley to the DVD big pulley with a big rubber band. 
Now the LIGHTHOUSE is ready. As you crank the handle the big pulley spins the motor pulley very fast. This generates an EMF and the current is sufficient to light up the LIGHTHOUSE LED. This model also shows that a MOTOR can be easily converted into a GENERATOR 

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org