sports good Dealers in Bajaj Nagar, Nagpur

• Features: Protects and comforts the ball of the foot. , Effectively absorbs shock and shear forces , Ideal for fat pad atrophy and metatarsalgia .
• Size: Small & Large

• Color: Green
• Material: Core technology
• Brand: Cosco

Activated Alumina Balls, alumina ceramic balls, Alumina Hydrate

• Type: Digital
• Material: Plastic
• Shape: Rectangular
• Feature: Eco Friendly
• Color: Available in Many Colors
• Warranty: 6 Months

The Whistle Responder beeps when it hears your whistle and this amazing invention is priced at a meager Rs 350/-. Some 20 years ago it was common to see small key-holders emitting an intermittent beep for a couple of seconds after its owner whistled. These devices contained a special purpose IC and therefore were not suited to home construction. The present circuit is designed around a general purpose hex-inverter CMos IC and, using miniature components and 9V batteries can be enclosed in a box. It is primarily a gadget, but everyone will be able to find suitable applications.About the circuit :This device beeps intermittently for about two seconds when a person in a range of around 5 meters emits a whistle. The first two inverters contained in IC1 are used as audio amplifiers.IC1'A' amplifies consistently the signal picked-up by the small electret-microphone and IC1'B' acts as a band-pass filter, its frequency being centered at about 1.8KHz. The filter is required in order to select a specific frequency, the whistle's one, stopping other frequencies that would cause undesired beeper operation. IC1'C' is wired as a Schmitt trigger, squaring the incoming audio signal. IC1'D' is a 2 second-delay monostable driving the astable formed by IC1'E' & IC1'F'. This oscillator generates a 3 to 5Hz square wave feeding Q1 and Buzzer (BZ), thus providing intermittent beeper operation.

Cricket Bat, Sports Goods

Sports Goods, ball badminton rackets, Sports Shoes

Fire Fighting Equipment, Fire Hydrant Valve (Single Control)