Let's Make Robots!

Penny - An Arduino SHR

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starthere1.0.pde3.38 KB
starthere1.2.pde3.88 KB

Introducing Penny. She's beginning her existence as a Start Here style robot. However, she's based on an Arduino Mega.

  • Video 1: Early testing of the servo and Sharp IR sensor used to test my code.
  • Video 2: Penny prototyped on a breadboard and running fine

Chassis

I re-used the motors, wheels and chassis from my original SHR, which has been gathering dust for a while.

Penny is configured back-to-front from the old SHR, with her drive wheels in the lead. I set the Sharp IR sensor back as far as practical, since it doesn't work well closer than 10 cm anyway.

The messy breadboard will get cleaned up. I plan to use Ro-Bot-X's Arduino shield for building robots, which will take care of .some of that wiring for me.

Update 2010-10-05: I have received the Ro-Bot-X designed Arduino shield and gave Penny an upgrade. Look at her now. Quite a difference!

Code

Penny 1.0 is based on a straight translation of fritls' Start Here code for the Picaxe. This is my first Arduino robot, so I wanted to start simple. I'm very pleased with the result.

I have attached the original code as well as an updated version that is fit for the Arduino shield and adds a backup function.

Electronics

I'm using an SN754410NE dual h-bridge motor driver. No other electronics yet.

Execution

As you can see in the 2nd video, Penny is working fine. I adjusted some parameters, like how far away she reacts to an obstacle. There's plenty of room for enhancement of the basic SHR code, and I'll use Penny as a platform for learning more about  the Arduino.

Future

The future is bright for Penny. I have a lot of possible enhancements with an Arduino Mega as the brain power. We may see features like:

  • Wheel encoders
  • PWM
  • Line following
  • Edge/cliff detection
  • More actuators
  • Perhaps... penmanship

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Hey my friend,I like your robot,well done and great video explanations. It's good to have comments while the robot is running.

Thanks for posting and I'll keep an eye on your projects for sure :)

Code!!! We want to see the code!! (Or at least I do...  :P )

Also, what are you using for motor drivers? 

Congratulations.