ELECTROFACTS

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...