CamJam EduKit #3 Robot Chassis for the Raspberry Pi by DanielBull

Last crawled date: 3 years ago

This is a 3D printable robot chassis designed to be used with the awesome CamJam Edukit #3 and ANY Raspberry Pi (all models supported).
The CamJam Edukit #3 is a kit of parts which when used in conjunction with a Raspberry Pi provide all the electronics and mechanics required to construct a programmable wheeled robot with distance sensing and line following capabilities (only a chassis such as this one is required).
Aimed at being a low cost educational tool for teaching robotics and programming, the EduKit 3 has a full suite of worksheets and is great value for hobbyists and educators alike.
For more information please check:http://camjam.me/
UPDATE 2015-11-08 Support for old Pi's
Added tray for older model A or B
Added tighter breadboard clamp
Improvements to instructions
UPDATE 2015-11-29: Powering the Pi
I've had a few people ask about powering the Pi; I was going to make a blank area for USB power packs but because they come in all shapes and sizes and it would have made the chassis too large for most people to print I decided against it.
However all is not lost, there are a number of options...

Like I mentioned above, by far the easiest thing to do is get a small USB power pack and mount it down one side using double sided tape or blue tack. I found some of the long thin narrow packs work well (see photos above, near the end)


The second option is to get a 2 cell LiPo battery (7.4v) and a buck converter to step it down to 5v. In the photos above I have included an example using a Ryanteck DC - DC stepdown ( https://ryanteck.uk/power/16-dc-to-dc-stepdown-regulator-with-4aa-battery-box-0635648607214.html ). If you use this method you will need to monitor the battery voltage to make sure it doesn't get too low otherwise this will damage the battery, I'm using one of those small low cost integrated LED volt meters.

The third option is to get a single cell LiPo battery (3.7v) and a boost converter to step it up to 5v. In the photos above I have included an example using an Adafruit Power Boost 500C ( http://makersify.com/products/adafruit-powerboost-500-charger-rechargeable-5v-lipo-usb-boost-500ma ). This is particularly useful as it also stops it getting too flat and charges the LiPo when you connect power your normal Pi power pack its microUSB.
UPDATE 2015-11-29: Larger wheel holes
We've had a report that some people are getting fouling between the axles/shafts on the wheels and the holes in the chassis.To solve this I have added a new version of the chassis with 14mm holes instead of the normal 13mm.
UPDATE 2015-11-29: Pi Zero tray!
Its finally here, the Pi Zero tray, using a Pi Zero will give you LOADS more space for all your extras :)
UPDATE 2015-12-04: Updated Pi Zero tray
Added missing SD card slot in the Pi Zero tray.