Simple DC Motor | English

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In today’s world, hundreds of appliances use a motor. So, friends today let us make a very simple DC motor with house hold materials. You need a battery, safety pins, insulated copper wire, magnets, old bicycle tube, scissors and a cutter.
Take a 1.5 meter of insulated copper wire and wind it around the battery. Move it around 10 turns and remove it from the battery. Take one end and tie a knot and stretch it out. Repeat the same at other end. For equal distances of the weight both the knots should be diametrically opposite. Trim both ends to 3 cm. Now take a cutter and scrape off three sides on one end such that one side is still insulated. On other diametrically opposite side scrape the insulation entirely.
The coil is ready now.
Next take an old bicycle tube and cut two broad rubber bands. Stretch and fix these rubber bands on battery and tuck in the magnet and the safety pins. The motor is now ready. If you place the coil in this assembly it starts.
A motor is a device that converts electrical energy into mechanical energy. When the coil is connected to the battery current passes through it which makes it electromagnet. This electromagnet has its north and south poles. The permanent magnet placed in the vicinity of the magnet gives it attractive and repulsive kick depending on the polarity of both the magnets and the coil rotates.
As you might remember as we purposely left the insulation at one end. This precisely contributes switching the current on and off for every rotation.
Current passing, magnetic field and number of turns are the three important factors.
Wasn’t it simple? So make your own dc motor and have fun!

Team: Ashok Rupner, Apurva Barve, Shanti Pise, Prachi Pasalkar, Shilpa Jain