Wi-Fi Antennas On the Cheap [802.11 Wireless]

It should be noted right off that I intend to research information regarding unconventional wireless networking use. You probably won’t find much here that’ll help with day-to-day wireless networking. Unless, of course, you’re desperate and don’t care that your setup looks ridiculous.

Probably one of the most popular things I’ve run across when looking into wi-Fi antennas is what’s called “WOKTENNA” or “WIFRY.” Admittedly, these names aren’t used as often as the concepts that are derived from them, but I think the names are funny, and you should too.

The idea is to use any metallic parabolic device (think about what you have in your kitchen right now that fits this bill) and to place a wireless USB adapter at the focal point of the selected parabola. Its been found that Asian cookware, like various types of WOK cookware work very well for this purpose. Here is a site that shows a number of examples when people combine USB WiFi adapoters with DIY antennas to make a “poor man’s wifi,” including several variations of the WOKTENNA idea.

Another cheap option is the parabolic reflector antenna. The one I used is called the Windsurfer; a template is available at freeantennas.com. The site claims that a 1:1 scale of the template will net you about 9dbi of gain, double the size and you’ll see 12dbi of gain.

But, how do the cheapies compare to the “proper” devices available for increasing gain?

Using a stock Fonera (from FON) version 1 wireless access point with DD-WRT firmware I attached various antennas and performed simple signal trials using a laptop and Netstumler. Below, you can see a screencap of Netstumbler’s output. The first section on the left was just some testing before running the trials. The stock Fonera antenna provides a mere 1.5dbi of gain, and at approximately 111 meters, gets a signal to noice ratio of -70 to -60 dBm. A large 5dbi omni-directional antenna attached to the Fonera provides a solid -60dBm rating at 111 meters. The same antenna with a Windsurfer parabolic reflector provides slightly more gain. Using a 10dbi directional panel antenna — the “proper” way to direct wireless signals — performs equally with the 5dbi omni-antenna with the Windsurfer attatched.

WiFi Signal Stregnths of various antenna methods. (Click to view full image)

Approx. range of trials. (Click to view larger) Tests were performed at ground level, folliage was not an issue.

The most surprising result, however, is the result seen with the stock 1.5dbi Fonera antenna and the Windsurfer parabolic reflector. As Netstumbler reports it, this arrangement provides just as much gain, even a pinch more, than all previous antenna combinations, including the 10dbi directional panel and the much larger 5dbi omni-directional antenna!

So, if you’re trying to get a signal outdoors or to the other side of your home, try throwing a parabolic reflector antenna on your current setup before laying down any cash on inferior solutions!

Coming soon… additional tests with the same antennas at a larger distance, new antennas, and a dual-antenna setup (Linksys WRT-style).

100s of Free Worship Backgrounds & Graphics [Church Media]

I was recently hired by a church in my area to maintain their computers, networks, information services, and web site.  Being a poor college student, and previously, a jobless high school student, I’ve gained an appreciation for frugality. That, combined with witnessing disproportionate amounts of cash misdirected in other area ministries, I am determined to support the ministries at this church by positively affecting the most people and supporting the ministry staff while operating under one of the smallest budgets.

One of the responsibilities I took over was the creation of the Sunday morning visual presentation (lyrics, sermon notes, announcements, etc). Previously, someone purchased stock photos from iStockphoto to use as backgrounds for lyrics. Unfortunately, it seemed that this person (long gone before I arrived) had very little money with which to work. There were only a handful of images which were only in small to medium-sized web quality; certainly not something that would look any good when blown up on a large projection screen.

So, off I went on a hunt to find web sites and Flickr users that would allow me to use their photos freely. Sure, there’s plenty of sites out there that offer spectacular photos made specifically for the purpose, but it all comes at a price. After some time, I’ve discovered a few good sites, and one really good Flickr group who freely share their works with the church community. Even if you don’t need backgrounds, or any of the images found on these sites, they’re a great place to get ideas for your own graphic projects.

Free worship and church backgrounds, graphics, and media:

• Shared Worship Background Graphics (a Flickr group pool)
• CreativeMYK Gallery (community dedicated to sharing resources)
  
• Background 4 Christian
• Church Worship Graphics (Flickr set by dtchristner)
• Christian Wallpaper (Flickr set by David Gunter)
• E-Water (offers simple, yet inspiring videos available in flash, PPT, or avi format) (Added 7/19/09)
• kineticFaith (focuses on providing a full suite of images and videos for central themes) (Added 8/20/09)
• VintageChurch.cc (web site dedicated to connecting churches with substantial resources to those with less) (Added 1/24/11)
• Free Presentation and Worship Backgrounds
  

Also, if you’re looking for videos or motion backgrounds, here’s a web site that gives them away for simply registering. They’re the real deal, and they’re doing a wonderful thing. Consider sharing your media with them if you have any to share:

• Muddy River Media

This web site provides a small selection of free video backgrounds in return for registering:

• Videos2Worship – Motion Background Loops (Added 11/30/10)

Free Podcast Music [No, Seriously!]

PodSafe Audio – Podsafe Music under the Creative Commons license for Podcasting

Gas – Cash + Receipt = Less Hungry

Jack in the Box is giving you two free tacos on Thursday, June 26th, 2008 when you bring in any gas receipt.

The fine print says “2 Free Tacos with valid gas receipt.” Not much to say what’s valid, though. Does it have to be a receipt dated June 26? Dunno.

Go get a gallon and go get some free grub. (And yes, it’s “free grub” because you’d have to buy that gallon anyway. And no, I’m not about to discuss the “gas wasted” in driving to the nearest Jack in the Box! Yeesh.)

Free Food Tastes Best

Until May 15th, Carls Jr. is giving you a deal on a Western Bacon. Buy one, and get the drink and fries free.

(I know the coupon extends underneath the side bar… get over it.)

EDIT: Ok… I forgot IE doesn’t do layering well. I shrunk the image. Click for full size.

Official CJ page here.