SENSORS:

A sensor is a device that measures a physical quantity and converts it into a signal which can

be read by micro-controller. 

• heat,
• motion,
•  gyro, 
• sonar,
•  IR,etc…

TSOP 1738:

It is a DIGITAL IR SENSOR, giving outputs of 0V and 5V.

It does not respond to any stray IR, it only responds to IR falling on it at a pulse rate of 38 KHz (given by TIMER of micro-controller)

Can accurately distinguish between 2 colors.

 Circuit Diagram:

IR Analog Sensor:

It gives output in the range of 0V to 5V, depending on the amount of IR light falling on the photo diode. (read by ADC of micro-controller)

Hence the name analog…

Circuit Diagram:

QRD1114:

It is an easy-to-use, simple analog sensor (Output range: 0V to 5V)

Has a very small range: 0.5mm to 1cm

Used to distinguish between bright and dark colours

LDR (Light Dependent Resistor)"

•made of calcium sulfate…

•When no light falls on it, the LDR behaves as an open circuit (very high resistance: 10^6 ohms)

•As the intensity of light increases, the resistance drops (to about 10 to 100 ohms)

Circuit Diagram:

INTRODUCTION ON ROBOTICS
http://youtu.be/DaWMvEY3Qgc

video lecture about robotics by NPTEL refer link
http://nptel.iitm.ac.in/courses/112101099/1

Approach required for robotics

Pursuing Robotics is not easy. Even if u r very interested in it,& r fascinated by the possibilities ,always remember few things whenever u think about robotics

• NOTHING IS TOO EASY,AND NOTHING IS TOO DIFFICULT

 NOTHING IS TOO EASY- U will have a picture in ur mind but to get it working will take a lot of  planning,ground work & meticulous execution.
 NOTHING IS TOO DIFFICULT-nothing in robotics is too difficult provided u approach the problem with the right plan with the right temperament.First time u look at it, any component,any connections, any logic would look difficult in robotics. u need to rise above the fear of the new,to be able to appreciate the beauty of robotics.

• SMALL STEPS LEAD TO BIG SUCCESS

In robotics it is more often that the  idea u have in ur mind will become reality only through small steps.

• THERE R BAD DAYS & THERE IS A GOOD DAY

Which ever area of robotics u would be working on,this in the most important thing to remember.There will be many days when even if u r investing long hrs of work,the success seems to be little or none for that matter.At the end of the day u may feel.
'IS IT WORTH THE EFFORT ,AND HARDSHIP?'
YES it is.
Key to success in robotics is to preserve though all these days for the good day always comes.Good Day is when things fall in place,everything starts working and then it's magic.Everyone goes through the cycle of bad days and good.Once u learn this,everything else becomes easy.

• DREAM.BECAUSE ONLY THOSE WHO DREAM HAVE A CHANCE TO MAKE IT COME TRUE

Be fascinated by ur idea .Imagine its impact.Every time u feel like quitting after a bad day, its ur dream that would keep u going. 

A simple autonomous robot

The 3 Schools of Robotics:
• Mechanical Design 
– Types of motors
– Material selection 
– Driving, gripping, clamping, climbing, lifting…
 • Electronics
 – Micro controllers
 – Motor Drivers
 – Sensors (Infrared, Ultrasonic, etc)
• Programming
 – Microcontroller Programming
 – Communicating with a computer.
 – Communicating between multiple robots.

its a long time since posting about starting blogging about basic of robotics,
So here its the things,
1st at starting of basic robotics is a combination of different fields such as
mechanical,electrical,electronics etc.
2nd need to have basic knowledge of  different component that are being used.
3rd need a creative mind for problem solving as well as designing part.
So getting started with basic robotics i prefer some knowledge about robotics& what do u mean by the word robotics.
Robotics is the branch of technology that deals with the design, construction, operation, and application of robots, as well as computer systems for their control, sensory feedback, and information processing. These technologies deal with automated machines that can take the place of humans in dangerous environments or manufacturing processes, or resemble humans in appearance, behavior, and/or cognition.