Showing posts with label do it yourself. Show all posts
Showing posts with label do it yourself. Show all posts

Friday, July 4, 2008

Recharge any battery: save the environment by saving money

People are skeptical when I say economic efficiency means environmental efficiency. They often point out externalities as a counter argument, though if you defend property and individual rights, this problem can be mediated: pollute my land, and I sue you. Outside of the tort system, here's a way you, as an individual and as a consumer, can both save a lot of money and save the environment.

Don't throw away your batteries when they're dead! Any student of chemistry knows that a battery is a reversible chemical reaction. The truth is, many alkaline batteries can be recharged. Now the reason why I use the qualifier most is that some batteries are purposely designed to malfunction when you recharge them, to get you to buy more of course.

What I use is a discontinued Rayovak Recharger, which is a scaled down version of this one. I don't know why they stopped making these, but perhaps they did when people found out they could recharge any alkaline battery, as opposed to just rayovak brand rechargeables. Recently, Rayovak launched a new line of rechargeables, but I have not tested these out to see if these still work.

Ideally, any automatic recharger works (the kind that shut themselves off when they detect a full charge), but be careful testing. You can even do it yourself if you're adventurous. One thing I must point out though is that the chemicals inside the battery can irritate your skin, so if you see any sign of leakage, remove the battery with a thick paper towel and wash your hands. You'll notice a distinctive sour odor when batteries burst, which is another way of telling if they've malfunctioned. If the leakage got onto the charger or electronics, you can either wipe it down immediately or wait until it dries and dust it off. Also, if the battery stays warm a while after you've charged it, that means that the battery shorted and can no longer be used. Also, most batteries have some kind of expiration date on them, and this is a good rule of thumb as to your success in recharging the battery.

Ideally you should be able to recharge the batteries as often as you want until the battery can no longer be recharged. If you want, you can use a permanent marker and add a tally mark each time you recharge your batteries.

Good luck, have fun, and remember, safety first!

Tuesday, March 4, 2008

Getting Windows Vista NOT to screw up networking

I recently bought a low-end laptop, and much to my surprise, it came Windows Vista instead of Windows XP. It sure looks pretty, and, in fact, I'm using to write this blog write now. However, Windows Vista has an infuriating flaw.

It won't network with Windows.

First a little background on my network topography. I run Windows 2003 Server as a router, file server, and print server. I've gotten everything, and I mean everything to read file shares on this network. I've gotten almost every Windows OS (save Vista) to work: Windows 95, Windows 98 SE, Windows 2000, Windows XP Professional, Windows XP Professional 64-bit. I've even gotten openSUSE (a flavor of Linux) to read network shares using Samba, with the small exception of folders on NTFS drives.

And Windows Vista? Absolutely nothing. Yes, I can connect to the internet, but I see nothing on the network. Microsoft Help pointed me in the direction of installing the LLTD (Link-Layer Topology Discovery) protocol. Of course, it can only install in Windows XP. I forced it to install using compatibility mode on Windows 2003, and added the protocol to my network card, and rebooted the server.

Four hours of a wasted evening later, I can now not only finally see the shared files on the network, but I can also see the position of my 2003 server in my network. If it had taken one hour longer, I would have torched my laptop. Let's just say I don't expect the average home user to figure out this problem on their own, and may cause a small amount of chaos in IT departments across the country. Thanks, Microsoft.

Tuesday, June 12, 2007

Why does radioshack continue to exist?

A recent failed purchase at a nearby Radioshack store made me wonder at how much life imitates art. The onion published a hilarious article entitled Even CEO Can't Figure Out How RadioShack Still In Business. Read it for a good laugh, because unfortunately, the funniest material they write is firmly grounded in reality.

Here is a shining example as to why Radioshack's business model is fatally flawed. I have a computer hooked up to my HDTV that I use to play DVD's and recorded movies off my network. I wanted to improve the picture by switching from a VGA cable to DVI cable. These aren't obscure parts, even though Radioshack traditionally has been known to carry a motley assortment of electronic parts. Many of you probably recognize the cables easily from the pictures shown in the links.

There is a Radioshack close to home that is within walking distance. But just to be safe, I went on their website to verify that they have a number of DVI cables to choose from. It seemed like they had a wide variety, from the useless, overpriced Monster brand to a less overpriced in-house brand. I figured the extra expense of buying the cable in person would be made up by the convenience and speed compared to the shipping costs and waiting time of buying online.

When I went to the store one evening, the first rack near the door contained an army of overpriced monster cables. This was expected, since the markup on those monsters is monstrous, and probably reel in a hefty profit. You see, since the DVI specification is a digital signal, there is absolutely no benefit to having the higher priced monster cable. Unless there is a fundamental flaw in the cable you buy, you're better off getting the cheapest cable you can find, though I'll get more into that later. Thankfully, they had some in-house generic brand cables there too. However, not one single cable of these was a simple DVI cable. They had lots of HDMI cables, and they even had a DVI-to-HDMI converter. I could have cobbled together some kind of hack to get the DVI signal to go to an HDMI plug in my TeeVee, but the total cost would have been over $100! Frustrated, I asked the sales clerks (who were by now hovering around me like flies gravitating to a freshly laid turd) for some aid. Naturally, they guided me right back to the rack full of Monstrosity Cables, and didn't find a DVI-to-DVI cable either (no shit sherlock). I told them that they had lots of these kinds of cables online, but assured me that I was probably looking at internet only products. They then suggested I cobble together that same DVI-to-HDMI hack that I mentioned earlier. I promptly told them not to waste any more of their time and bid them adieu.

This is a picture of the clever hack I would have had to buy at Radioshack. The product on the left is the Monster DVI to HDMI adapter. That costs 34.99. The shortest Monster HDMI cable they had was 79.99. Total cost (before tax) is roughly $115.

So feeling a bit disgruntled, I decided to surf over to amazon.com, among many choices of web vendors. I searched for DVI cables, ordered it by cheapest, and found found 6 FT. DVI SINGLE LINK CABLE for the shockingly low price of $1.50 new from one of the independent sellers (Amazon's price was $7.99). Even with 4 bucks of shipping it and using the Amazon price, it was still massively affordable. Figuring there was a catch as to why it was so cheap, I did a little research. According to wikipedia's DVI article, there are two flavors of DVI: single and dual. Single supports 1920×1200 resolution compared to dual's 2560×1600. Single is therefore the cheaper of the two. Since my HDTV is 1336×768, a single link DVI cable is more than enough to satisfy my needs.

I received the product in plain packaging a few days later, and the picture on my TeeVee is crystal clear, since it's a "perfect" digital signal, far superior to the original VGA cable. All this from a product that cost less than 10 dollars.

This goes to show that the success of Radioshack is based on the ignorance of the general public to its price-gouging activities by pushing Monster products above all else. Buying Monster only makes sense when the best performance is needed: wiring expensive high-fidelity and high-wattage audio equipment over 40 feet, such as at a club or at a rock concert, using analog cables. For digital video and digital audio, the cheapest quality cable will be more than sufficent. Even if you feel compelled the highest quality goods to simply show off to your friends, you'll be better off buying your monster cable online. As more an more people are drawn to the internet, Radioshack will increasingly find fewer and fewer reasons to exist.