September 2011
4 posts
“In brightest day, in blackest night,
No evil shall escape my sight
Let those...”
4 tags
Aurora Led with Atmega 8
http://rookiepeng.blogspot.com/2011/09/aurora-led-with-atmega-8.html
This awesome idea comes from the the led artist: http://www.theledart.com/blog/ I made another version with the atmega 8 MCU and 70 LEDs. It is not so good as the upper one. I just made it for fun. So watch the video first, which is recorded by my SGS phone. Hardware:
PCB x1 ATmega 8L x1 3528 full color LED x70 SI2301...
5 tags
A Bash Script to Create Multiple User Accounts in...
http://rookiepeng.blogspot.com/2011/09/bash-script-to-create-multiple-users.html
There are a lot of introductions on the Internet about how to create multiple user accounts in a batch with “newusers” command. But in this way, there are some problems about the environment variables. The system will not initialize the “.bashrc” and the “.bash_proflie” files. ...
2 tags
E-T waveguide power divider
http://rookiepeng.blogspot.com/2011/09/e-t-waveguide-power-divider.html
This is a 2-way power divider I made, which is used in a broadband feed net of a horn antenna array. Firstly, a E-T junction (figure 1a) can equal to a transmission line model like figure 1b.The junction is inductive.Here we assume that the impedance of L1 is Z0. So the S11 of this structure is not very good. For a perfect...
August 2011
2 posts
3 tags
The Corner of a Waveguide
http://rookiepeng.blogspot.com/2011/08/corner-of-waveguide.html
Some simulation results of the 90 degrees corner of the waveguide with CST Mcirowave Studio.
There are two kinds of waveguide corner, one turns in E plane, the other turns in H plane.
Figure 1 is the model of the E plane waveguide corner. The size of the waveguide is 14.5mm x 9.525mm.
Figure 1. The model of the E plane waveguide...
June 2011
4 posts
Install the Wordpress on Fedora 15
comes from my blogspot: http://rookiepeng.blogspot.com/
In my previous post, I have setup the web server with the LAMP: http://rookiepeng.blogspot.com/2011/06/how-to-setup-web-server-on-fedora-15.html
We can run the wordpress on the server. The wordpress can be downloaded from http://wordpress.org/.
Before installing the wordpress, we need some configurations on MySQL. I use phpmyadmin to...
Enable SSH on Fedora 15
comes from my blogspot: http://rookiepeng.blogspot.com/
“Secure Shell or SSH is a network protocol that allows data to be exchanged using a secure channel between two networked devices. The two major versions of the protocol are referred to as SSH1 or SSH-1 and SSH2 or SSH-2. Used primarily on Linux and Unix based systems to access shell accounts, SSH was designed as a replacement for...
6 tags
How to setup a web server on Fedora 15 with...
comes from my blogspot: http://rookiepeng.blogspot.com/
It had been three years since I first knew Linux. I had tried several different distributions like Ubuntu, Fedora and OpenSUSE, but I didn’t have enough time to learn it in depth.
Now I have a plan to learn more about linux (Fedora), such as setting up a web server, starting a FTP server, doing some development, etc.
I had setup a web...
