Listing ID #964133
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Contact SupplierInfrared Obstacle Detector is useful in many applications. One of the most demanding applications can be a tool for blind person. Latest technologies like Automatic (driverless automobiles, train anti-collision, electronic toys like car, train, and robotic gadgets etc.).
The principle involved is infrared (IR) emitter and receiver. When IR emitter emits light and it becomes incident on an obstructing object, it gets reflected. This reflected light is picked up by a sensitive receiver and can be converted to suitable signal to alarm the user regarding the obstacle. Absence or reduction of received light decides the presence or absence of the obstacle.
Modulation is the answer to make our signal stand out above the noise. With modulation we make the IR light source blink in a particular frequency.
Another purpose this modulation solves is to make the circuit more sensitive and able to work with higher range i. e. to detect obstacles from more distance, the light emitter is modulated at about 38 KHz.
About the Circuit :