Turtle Robot

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jbish
 
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Joined: Fri May 15, 2015 8:28 am

Turtle Robot

Post by jbish »

Hi

I am keen to make an "old school" turtle drawing robot. I think it would be great for my kids to be able to programme it so that it goes forward and back and draws shapes and stuff.

I have a raspberry pi "b" and was thinking of using that as the brains of the turtle. I have previously built (many, many years ago controlled by an Acorn Electron .... (shows my age ...)) a turtle which used DC motors and would never go in a straight line .... So was thinking of using Stepper Motors.

So - I think I need ....

1) Chassis
2) 2 x Stepper Motors
3) Something to make pen go up and down
4) pi (have)
5) batteries for motors
6) batteries for pi
7) Other stuff to connect it all together (and there is the gap in my knowledge ....)
8) And perhaps a little touch screen on top to tell me what the pi is thinking and tell it what to do ....

Can anyone point me in the direction of a similar project someone might have written up or help me flesh up my shopping list.

Thanks

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: Turtle Robot

Post by adafruit_support_bill »

You will need a stepper motor driver to run the steppers. The Motor Hat will handle 2 of them: https://www.adafruit.com/product/2348

I don't know of any off-the-shelf stepper-based robot chassis. If you are handy in the shop, it should not be difficult to fabricate something along the general lines of the BOEBot chassis.

Another approach to the 'go straight' problem using regular DC motors is to add a magnetometer or even an IMU for navigation. https://www.adafruit.com/categories/59

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jlharing
 
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Joined: Thu Feb 26, 2015 4:24 pm

Re: Turtle Robot

Post by jlharing »

You could also try starting with something like this: https://www.adafruit.com/products/1639

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: Turtle Robot

Post by adafruit_support_bill »

You could also try starting with something like this: https://www.adafruit.com/products/1639
Good point. The latest Zumo chassis has an IMU built-in. It is a great little robot chassis: https://learn.adafruit.com/pixy-pet-rob ... ng-pixycam

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