Downloaded 281 times
Uploaded bySudar Muthu
Arduino Robotics workshop day2
This document summarizes Day 2 of an Arduino robotics workshop. It discusses varying the speed of motors using PWM, playing tones on a buzzer, using infrared (IR) sensors to detect obstacles and teach the robot to avoid strangers, and introducing more advanced concepts like using interrupts and timer libraries to make the robot autonomous. Code examples are provided to demonstrate different techniques like reading sensor values without delays, controlling motors with interrupts, and implementing software interrupts on any pin. The document concludes by suggesting additional robotics projects and listing relevant links.
More Related Content
Similar to Arduino Robotics workshop day2
Arduino Robotics workshop day2
- 1. Arduino Robotics Workshop Day 2 Sudar Muthu (@sudarmuthu) http://hardwarefun.com/arduino-workshop http://github.com/sudar
- 2. What we haveseen so far? Basics of Robotics Using Breadboard Digital and Analog I/P and O/P Serial Communication Controlling DC Motors Assembled the robot Made it run http://hardwarefun.com 2
- 3. Today we willsee.. Varying the speed of the motor Play some tunes using the buzzer How IR works Making use of IR to find obstacles Make the bot avoid strangers Making it autonomous Some Advanced stuff http://hardwarefun.com 3
- 4. Varying the speedof the motor using PWM http://hardwarefun.com 4
- 5. Playing tones inthe buzzer http://hardwarefun.com 5
- 6. Playing sound We can generate a square wave at specified frequency using tone() function Usage: tone(pin, frequency, duration) http://hardwarefun.com 6
- 7. Teaching robot toavoid 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
- 8. Let’s see somecode http://hardwarefun.com 8
- 9. Let’s get somefood http://hardwarefun.com 9
- 10. What are thelimitations that we have faced so far? http://hardwarefun.com 10
- 11.
- 12. Issues with delay Your microcontroller is going to sleep You can’t read or write while in delay Eg: You can’t detect an obstacle when the bot is making a turn http://hardwarefun.com 12
- 13. How to fixit? http://hardwarefun.com 13
- 14. Using Timer library https://github.com/JChristensen/Timer http://hardwarefun.com 14
- 15. If we don’tread the pin, then we miss the value http://hardwarefun.com 15
- 16. Methods in Timerlibrary every(long period, callback); after(long duration, callback); oscillate(int pin, long period, int startingValue); pulse(int pin, long period, int startingValue); update(); http://hardwarefun.com 16
- 17.
- 18. Hardware support Pin 2 and 3 Supports LOW, CHANGE, RISING, FALLING No software support is needed Can be removed as well http://hardwarefun.com 18
- 19. Let’s see somecode http://hardwarefun.com 19
- 20. What if weneed it on other pins? http://hardwarefun.com 20
- 21. Software Interrupts http://code.google.com/p/arduino-pinchangeint/ http://hardwarefun.com 21
- 22. Can be usedon any pin http://hardwarefun.com 22
- 23. Let’s see somecode http://hardwarefun.com 23
- 24. Some ideas totry Making your robot follow a line Making your robot stay in a table Replace IR with ultrasound sensor Control the bot remotely using RF http://hardwarefun.com 24
- 25. Things I havetried Controlled it using Android phone Controlled it using JavaScript and WebSockets Controlled it using Bluetooth Controlled it using RF Added a missile launcher to it https://github.com/sudar http://hardwarefun.com 25
- 26. Links Arduino –http://arduino.cc 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
- 27. Questions Thank You Sudar Muthu (@sudarmuthu) http://hardwarefun.com/arduino-workshop https://github.com/sudar/arduino-robotics-workshop