3D Printed case

I've designed and 3D printed my first case for the Rasp Pi and camera board.

http://www.civrays.com/rasppi/index/pi

http://www.civrays.com/rasppi/index/camera

This is a bit basic and not really much use yet. For a second attempt I was thinking of including a micro servo to pan the camera. I'm not sure how to control the servo from the Pi as there is no PWM. Has anyone done this, or would I be better off with a stepper motor and driver chip?

Former Member over 11 years ago

Thats a great case! Looking forward to seeing the finished product with the stepper motor!
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Nate1616 over 11 years ago

Hey Steve
Nice case by the way. There are many blog posts that show how to control a servo with a Pi. Here is just one to check out. http://www.element14.com/community/groups/raspberry-pi/blog/2013/02/08/controlling-a-servo-motor-with-the-raspberry-pi

Nate
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Former Member over 11 years ago in reply to Nate1616

Hi Nate thanks for the link.

I understand the basic principle of how to control the servo by creating a pulse on the output pin, but I was kind of hoping there was a recomended pre-written library that could be used. In python maybe.

The article for which you provided the link for does not really explain how they created the pulse, unless I missed that bit. My undersatnding is that the timing is quite critical. How can I ensure things don't get messed up if the pi is performing some heavy processing?
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Former Member over 11 years ago in reply to Former Member

Ah, sorry. I should follow the links. Your link takes us this this link;

http://learn.adafruit.com/adafruits-raspberry-pi-lesson-8-using-a-servo-motor

which expains one way of doing it using Adafruit's Occidentalis distribution.
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