A simple way to remove sticker residue using WD40.

In this tutorial, learn how to build an Infrared (IR) pen. This pen can be used with a Wiimote to create a multi-touch whiteboard. Buy all the parts mentioned in the parts list and then watch the assembly video. (more…)

This tutorial shows you the easiest way to create an executable jar file in Java using BlueJ.

1. First install BlueJ by clicking here if you don’t have it installed already.
2. Type in all your code and compile it.
3. Then from the top menu go to “Project” and from the drop down menu click “Create Jar File”
4. Click “Continue”
5. Name your jar file and choose its directory. Then click save and you’re done.

That’s it! You should be able to double click your jar to execute it.

This tutorial makes it easy to program the quadratic equation into your TI 83/84 calculator even if you have no programming experience. (more…)

This tutorial shows you how to compile a Java program using the command prompt. (more…)