Here is how to install a wireless game adapter into your XBOX internally so that you can have a wireless connection, where available, without the extra hardware.
http://www.i-hacked.com/content/view/223/62/
All you really need to know is that the special sauce lies in embedding Linux in your router and then converting this into a powerful, highly configurable $600 router. Here I am going to walk you through upgrading your router firmware to the powerful open source DD-WRT firmware.
http://www.lifehacker.com/software/router/hack-attack-turn-your-60-router-into-a-600-router-178132.php
It has been argued that getting a security key off a webpage is a bad idea. If you're utterly paranoid about getting a key off a webpage (in spite of getting here via https) then do not use these keys. This secure page gives not so deterministic random WEP keys in hexadecimal notation.
https://www.wireless.org.au/~jhecker/wepgen/index.php
A friend of mine aquired a pair of DLink DWL-900APs which he wanted for a 2.5km point to point link with above 2Mbit speed. So I undertook to make him a Power Over Ethernet kit. As the DWL-900AP needs 5V to operate, I have included regulation so that the AP will get consistent power over a variety of CAT5 cable lengths. This POE IS NOT compatible with the IEEE 802.3af POE standard.
http://www.wireless.org.au/~jhecker/poe/
The goal of this project is to extend the range of an 802.111b Linksys router by implementing an RF amplifier and antenna. Using the final product, the range for the router was extended significantly compared with the original antenna.
http://www.engr.sjsu.edu/rkwok/projects/Project802_11.pdf
Contains several forms for calculation of Power in terms of dBm, Loss in a co-axial cable, theoretical antenna gain, radiated power from antenna, free space loss, receiver sensitivity, signal-to-noise ratio, Fresnel ellipsoid, and a lot more.
http://www.swisswireless.org/wlan_calc_en.html
This circuit connects to the serial port of many cellular phones. It provides an input and an output port capable of being remotely controlled using another mobile. When the mobile receives a predefined SMS text message, like Activate burglar alarm or Start backup pump, the circuit automatically recognizes it as a command and switches the output accordingly.
http://www.riccibitti.com/tinyplanet/tiny_article.htm
A PoE module inserts DC voltage into the unused wires in a standard ethernet cable (pairs 7-8 and 4-5). The idea is to supply the AP's power and UTP ethernet connectivity requirements via a single ethernet cable.
http://nycwireless.net/tiki-index.php?page=Poe
This project is an attempt to capture 10BASE-T (10Mbps) Ethernet packets using phase locked loop (PLL) clock recovery. This is not the best way to do it! FPGA is the way to go. This is really an exercise in PLL design. The challenge is to lock in less than 64 cycles (6.4 µs) which is the length of the 10BASE-T preamble.
http://www.holmea.demon.co.uk/Ethernet/EthernetRx.htm
Making your own Power over Ethernet (POE) cable to supply power to your router/access Point/wireless gateway using only your RJ-45 connection.
http://www.cablemodeminfo.com/quicktip-cabling-power-ethernet.html-ssi