Mad Of Science

                       Few  days back  while watching Tv  suddenly  I noticed a change in  the picture size. I changed the channel and it remained the same .The problem is horizontal picture size of my Tv , it has shrinked. The vertical size is  fine.                   ...

Free Road Side Lighting :                Have  you ever noticed  a lot of wind energy is produced and wasted , as a vehicle pass by you along the high way. These  wind energy produced throughout the day can be used effectively to generate power. These power can be used for lighting road side lights.           Placing small wind...

You might have all came across many electric bells using electromagnet ,this is yet another one with slight modification , a home made electric bell. Materials Required: Gong ( toy car ) Hammer (battery cover sheet) Electromagnet ( Picture tube coil) 9 V battery Simple Switch Mechanism.(hanging wire) Pole Supporting Hammer ( pen refill) Electromagnet: When electric current passes through a coil wound on a soft iron core ,iron...