Let’s make Robots

Sudar Muthu (@sudarmuthu)Research Engineer, Yahoo! Labshttp://hardwarefun.comhttp://github.com/sudar

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Why hardware for a software hacker?

Fun!

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Demohttp://hardwarefun.com/projects/asimijs

Let me show you how fun it is..

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Participate in the demo

Visithttp://hardwarefun.com:3000

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Control the bot at stage

http://hardwarefun.com/projects/asimijs

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Isn’t that fun?

Now let’s see how you can build one

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MotorsSensors

Processor

Anatomy of a Robot

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Sensors (Input)

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Motors (Output)

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Processor (Brain)

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Arduino

Visual Basic for hardware Treat it like a computer Sensors are inputs Motors are output

Photo credit Arduino team

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Demo

Let there be LIGHT

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Code

void setup(){ pinMode(13, output);}

void loop(){ digitalWrite(13,HIGH); delay(1000); digitalWrite(13,LOW); delay(1000);}

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Hardware setup

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Demo 2 - Reading sensor data

What you need?

A Light sensor and a LED

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Reading sensor data

void setup(){ pinMode(13, OUTPUT);}

void loop(){ int val = analogRead(A0); if (val > 50) { digitalWrite(13, HIGH); } else { digitalWrite(13, LOW); }}

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Exotic uses of Arduino

Making YQL (REST) calls Parsing JSON Interacting with USB devices Interacting with Android phones … and lot’s more

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Simple Moving Robot

2 DC Motors and H-Bridge 2 wheels and a body frame Battery

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Teaching robot to crawl

Move Forward Both motors rotate in the forward direction

Move Backward Both motors rotate in the reverse direction

Turn left Left motor stops. Only right motor rotates forward

Turn Right Left motor moves forward. Right motor stops

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Teaching robot to avoid strangers

Two IR LED’s. One receiver, one transmitter Both face the same direction Keep transmitting IR waves If receiver receives waves, then there is a obstacle Otherwise keep moving

… same logic applies for Ultra sound as well.

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Putting everything together

You have your first fully autonomous robot ready.

Now take her for a walk

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What’s Next?

Do join us upstairs.

We are going to implement Machine Learning Alogo to Asimi

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BTW, this is how the demo worked

Node.js Server

Admin page

User pageUser page

User page

Node Client

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Links

Arduino – http://arduino.cc AsimiJS – The demo that I showed initially http:/

/hardwarefun.com/projects/asimijs Asimi – A simple bot using Arduino

http://hardwarefun.com/project/asimi Getting started with hardware programming

http://hardwarefun.com/tutorials/getting-started-with-hardware-programming

Getting started with Arduino http://hardwarefun.com/tutorials/getting-started-with-arduino-and-avr

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Questions

Thank You

Sudar Muthu (@sudarmuthu)http://hardwarefun.comhttp://gitbub.com/sudar