Difference between revisions of "Rhea Banthia"

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(How to use an IR sensor?)
(How to use an IR sensor?)
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An IR proximity sensor works by applying a voltage to a pair of IR light emitting diodes (LED’s) which in turn, emit infrared light.  This light propagates through the air and once it hits an object it is reflected back towards the sensor.  If the object is close, the reflected light will be stronger than if the object is further away.  The sensing unit detects the reflected infrared light, and if its intensity is strong enough, the circuit becomes active. When the sensing unit becomes active, it sends a corresponding signal to the output terminal which makes the LED glow.
 
An IR proximity sensor works by applying a voltage to a pair of IR light emitting diodes (LED’s) which in turn, emit infrared light.  This light propagates through the air and once it hits an object it is reflected back towards the sensor.  If the object is close, the reflected light will be stronger than if the object is further away.  The sensing unit detects the reflected infrared light, and if its intensity is strong enough, the circuit becomes active. When the sensing unit becomes active, it sends a corresponding signal to the output terminal which makes the LED glow.
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[[File:Obstacle close.jpg|border|LED glows when obstacle is close]] [[File:Obstacle far.jpg|border|LED doesn't glow when obstacle is far]]
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[[File:IR+LED diagram.jpg|frameless|500px]]
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[[File:Code for IR.PNG|border|400px]]
  
 
= PROJECTS =
 
= PROJECTS =

Revision as of 19:59, 12 March 2017

INTRODUCTION TO ELECTRONICS

Arduino

labelled image of an Arduino


Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online. An Arduino can be powered directly off of a USB port without any external power. It can also be connected to an external power source of up to 12v and it will regulate it to both 5v and 3.3v. Arduino has 32 KB of flash memory for storing a code. It has 13 digital pins and 6 analog pins. These pins allows connection of external hardware to the Arduino. And it has a button to reset the program on the chip.

Arduino IDE (integrated development environment) needs to be downloaded and installed before doing anything with the arduino. The Arduino Programmer is based on the Processing IDE and uses a variation of the C and C++ programming languages.

Sensors

Light Dependent Resistor (LDR)

Potentiometer

Piezo buzzer

Circuit

Voltage

Current

Resistance

Series resistance

Parallel resistance

Ohm's law

CIRCUITS AND CODING

How to make an LED blink?

Basic circuit

Using a potentiometer

Using a buzzer

How to use an IR sensor?

An IR proximity sensor works by applying a voltage to a pair of IR light emitting diodes (LED’s) which in turn, emit infrared light. This light propagates through the air and once it hits an object it is reflected back towards the sensor. If the object is close, the reflected light will be stronger than if the object is further away. The sensing unit detects the reflected infrared light, and if its intensity is strong enough, the circuit becomes active. When the sensing unit becomes active, it sends a corresponding signal to the output terminal which makes the LED glow.


LED glows when obstacle is close LED doesn't glow when obstacle is far


IR+LED diagram.jpg


Code for IR.PNG

PROJECTS

Spinning cup

Field visit

Turbidity meter

Extension to human body in future