In this assignment we have to design 2D and 3D sketch,as per Neil's last lecture, On a assignment page there was list of related design softwar
I start searching for design software I can use Auto cad but I am friendly with other software, So I decided to go with 1st Tinkercad and then Blender

Autocad,
blender,
Auto desk 123D design,make and catch,
Inkscape etc.

I had work on Auto cad 2007 so as part of new learning I am making design in blender.

First I did 2D design in Inkscape.

About inkscape my comment was,its very nice software for new peoples to design in 2D.
anyone can easily design press fit model with inkscape try object and path tool bars for edit design

I did 3D design file in Tinkercad(Autodesk)

I also design my model in blender which realy new experience for me. I learn from scartch design with blender.
sorry but I don't have blender original file so I share screen shot but share file for 3D modeling with sketch up

I have download 'Blender v2.68.' on Ubuntu machines

When you open'Blender software'so you will see following window then we have to select interaction format from given

default (Preset),
3Dmax
maya

from that I have selected interaction-by preset(Blender default)

about my design:

First you have to select view in which you are going to design.

I did my design in front view,because it's easy to draw and I can vidualise the object

Then I select cube from tool bar adjust dimention as per requirement.(Here you have you set dimension in metric window and scale on 0.001 so all dimension will be in cms

I want to make hole for LDR and one square for display screen then I add small circle and cube on main object with modifier,

In modifier you can add, subtract any shape with main object easily for this their is 'boolean' command.

For varification that added shape perfetly fit in main object or not we can check this with 'g' command which is used for movement