Dabbleboard

From the Dabbleboard web site:

Dabbleboard is an online collaboration application that’s centered around the whiteboard. With a new type of drawing interface that's actually easy and fun to use, Dabbleboard gets out of your way and just lets you draw. Finally the whiteboard enters the digital age!

It seems to have some object recognition software that helps clean up rough lines, squares, and circles into cleaner geometric shapes.

Also, since the board is web based, naturally the video demonstrates online collaboration on a whiteboard.

Shell scripting

I would like to learn more about shell scripting but am uncertain whether to learn something like Bash-scripting or find and read Python shell scripts.

One advantage to Bash-scripting is mentioned at reddit:

Python uses more memory and requires more disk space to be installed. This is might be important in small resource constraints environments such as embedded systems or small VMs.

Also the shell is always running and so shell scripts should start up faster than Python scripts.

Perhaps on a low cost embedded device Bash-scripting is the way to go. I will try to follow up on this later. As far as I can tell, one must have a shell on the system to work with, but having python is optional if one is willing to give up a lot of software. Therefore, for a system with limited hardware, in a sense you get bash scripting for free.

Prusa Mendel

From the Prusa Mendel web site:

Prusa Mendel is the Ford Model T of 3D printers.

Like the Model T, the Prusa Mendel improves on a previous design by being more streamlined for manufacture. The Prusa Mendel is a simpler remix of the original Mendel. By default, it uses printed bushings instead of regular bearings, though options to substitute inexpensive lm8uu linear bearings or other types of bearings or bushings are available. The current version uses three 608 bearings in total, one for the X axis and two for the Y axis. The 624 bearings are gone altogether.

Prusa's main goal is to be the purest and simplest 3D printer you can build.

I would like to learn more about this printer, but I need to finish some other, easier projects like the pong clock. Some day I would like to find a database of 3d models to print with such a machine. Maybe it could use html5 canvas 3d elements to preview the printable objects.