Seems like the old circular menu class is now incompatible with the new Arduino 1.0 GUI version.
Rober Wagner from the arduino forum described the incompatibility. He also sent to us an email and we thank him for the contribution.
The circular menu seems to interest a lot of people so we decided to "port" the circular menu class into the new Arduino 1.0 GUI.
We will try to describe the class in the future.
Now before starting have a look at the documentation of the "old circular menu".
As always you have to construct the three button configuration on your breadboard.
The down button is on digital port 7 the right button on digital port 6 and the enter button at digital port 5.
In order to find out how to connect buttons on your arduino please read the "arduino and memory how to" tutorial.
The etching is the technique that a strong acid chemical solution "eats" the unprotected copper.
So the etching method can be used for the production of printed circuit boards (PCB) since acid can be used to remove the unwanted copper from a copper clad.
A nice and easy method in order to make printed circuits at home is to use the so called : "toner transfer method". This method will be discussed in another article.
For now keep in mind that you have a copper clad (fr4) with the circuit "printed" (with toner) on it.
So this printed copper board can be etched with an acid solution called etchant.
This acid solution will eat all the unprotected toner and the remained, protected by the toner, copper will be our final printed circuit.
Selecting a firewall is not a trivial decision. Generally all firewalls are software-based. The embedded firewalls are simply very limited-capability programs running on a low-power CPU in order to obtain lower power consumption. You have to list your needs and select the software and then the dedicated hardware that can handle them. As first step we need to list our needs for the firewall.