ELECTROFACTS

Who invented Electricity? Many people argue between Nikola Tesla and Thomas Alva Edison for this credit. But they are far away from the truth.  Benjamin Franklin was the first person who tried to harness electricity from sky using a  Kite. String of the kite was made of conductor.  He wasn't successful on this attempt.  Luigi Galvani termed the concept of “Animal electricity” in  1780 , his experiment with dead frog is famous. During 1800, Alexandra Volta did further research and found that Animal electricity and Electricity from sky thunderbolt all are Fundamentally same. Neither  Tesla  nor  Edison  is the inventor of electricity. They are inventor of various  electrical devices . Electricity is  not  invented by  One Great Person  rather it was the contribution of various Scientists and Mathematician like Benjamin Franklin, Luigi Galvani, Alexandra Volta, Michael Faraday, Maxwell, Kelvin, George Ohm, Andre Marie Am...

INTRODUCTION Electronic blind stick is a simple tool that can help a blind person to detect obstacles like walls, tables, stairs, any sleepy liquid on the floor etc without touching them through an alarm system. This reduces the chances of any accident. Also if this blind stick falls down on ground,  then an automatic alarm starts ringing  so that its owner can easily find it even if he can’t see it. This blind stick is made at very low cost with a very simple circuit. WORKING Its working is very simple. It has two main parts: Sensors Signal Amplifier & Buzzer Fig:1 Fig:1 shows the block diagram of the complete system. Stick position detector, Liquid dirt detector and IR proximity sensor all of these come under 1st part i.e. sensors. Signal amplifier circuit and Buzzer comes under 2nd part. Different sensors detect different types of obstacles and generate an electrical signal. Those signals then go...