Saturday, March 10, 2007

FIRST Wisconsin Regional

This weekend in Milwaukee Wisconsin, the FIRST Wisconsin Regional Robotics Competition was held at the Cellular Arena. The event is for professionals and young people to coordinate together to build a robot for competition.

In Milwaukee, over 52 teams entered. These teams ranged from high schools, tech schools and corporate sponsored youth teams. The robots are built with standard internal kits part set by FIRST but the design and mechanical engineering is where the uniqueness of the robots comes in.


The event focuses on the main event of an arena type battle. In the center stands tall 10' tree of sorts with three levels of five branches. Though the rules change every year and are not announced until tournament play, I gathered that scoring was done as followed. Three robots on each side have 5 minutes to hang 2' inflatible tubes on the tree to score points. Depending on which level the ring is hung depends on the point value. Another thing the robots can do is lift another robot on its team. By lifting the robot a set height, you can gain 30 bonus points.

The three main classifications of robots witnessed at this event were Arm Robots (robots whose job is to hang the rings), Lifter Robots (robots whose job is to act as defense until the end of the tournament and then to lift their teammates for bonus) and Pure Defense (robots whose job is to ram into Arm Robots and Lifter Robots to stop them from doing their job) or "lil shits" as I like to call them.

The basketball size arena is split in half. One half being set for the arena and the other was the "pits". The pits are setup for each team to work on their robots between matches. Turn around time had to be quick and it seemed like the robots were brought battle damaged, just to be patched back together to go back out there. The damage of the robots was measured by how many members around it. One or two tightening chains or adjusting link rods and it was in good shape. You have one with 8 guys around it turning tools and hooking up meters, you can almost see the artificial life slipping away. Over the loudspeakers you can hear announcers calling for assistance "Attention Teams. Team 2012 is in need of a extension coupler rod. If any team has an extension coupler rod, your assistance would be appreciated."

Though the goal isn't to destroy, the feeling of a gladiator match is similar. With the fast pace of the robots competing and the sounds of techno and screaming groupies eclipsing the clangs and banging bots, I couldn't help but grin. The sea of students wearing T-Shirts of their schools teams screaming almost like a basketball/football/hockey championship. This was the Super Bowl of Nerds' and it was cool.

Friday, February 23, 2007

PC on Television pt 3 (External Interfaces)

On my PC I have a few bells and whistles I use for accessing media. I've always liked things that simplify the interface and make them more uniqe from a standard PC operating system. The added feature of these external interfaces is that everytime a video clip ends or a mp3 playlist gets dull you don't have to get up and move a mouse around.

Remote

One of my favorites is the my iMon remote. I've wanted to buy one of these for years, but I was apprehensive of how well they work. I didn't get one unitl one of my friends got me one for my birthday. I got it about 4 years ago and many newer models are out right now.

The model I have is the iMon +PLUS iMon RSC (Remote Stick Controller). It is one of their older models. Many of their newer models utilize radio waves over infared. The benefits of this is that you don't need "line-of-sight" like you do with infared. This would allow you to have your pc in a neighboring room and control it infront of your television (excellent for reducing system noise).

The setup was easy and the agility of the remote was surprising. Took a bit to get use to the thumb stick, but you adjust. Even though you can use it right after install, you will want to adjust the default setting immediately. The IR detector in the corner of the screen and beeping noise it makes to confirm a signal are more then annoying. On the positive side many major media applications are preprogrammed and programming new applications that aren't there is very easy. I easily programed Ace Media Player in 15 minutes by setting the controllers buttons to different macros. I even setup a macro that switches my video output from computer to television.

The remote also comes with a program that runs on your computer to "fullfill" all your media center needs. The program has a relative sleek look, but you would need it to run on a system as the proprietary program. it tended to run quite slow and clumsy searching for all of my various media. When you click on photos, I don't need to access every jpg on my system. There are ways to customize the program, but my initial reaction was that it wasn't worth it.

Pros
  • Works exceptionally well with the pc. Install software, install hardware, start playing.
  • Preprogramed with many popular media applications.
  • Easy to setup with unpopular or newer media applications.
Cons
  • Extra media program kind of generic and clumsy
  • default settings have to modified
Touchscreen

I've always loved touchscreens and believe they will be a key part in future computer and media applications. Just look at DS Lite. The downside is that they are expensive and many operating systems don't utilize the touchscreen.

I picked up an old touchscreen from one of my many resources. I can't think of the manufacturer right now but the screen was an old concession terminal that was taken out of use for a newer system. The screen is a 14" LCD with a small mountable base. One large cable comes off of the unit and breaks off into a VGA cable and a serial cable. The VGA carries the signal and the serial carries the touch information. The touchscreen itself loads like a serial mouse. The drivers for the touchscreen were non existant but I found a similar driver made by 3M (thats the company that makes tape, I guess they make touchscreen drivers too).

Sketchup rendering of touchscreen

With the touchscreen installed I can set it up as my pcs second monitor, using a DVI to VGA adapter on that second port on the card. With a simple drag and sizing Winamp fits perfectly on this small screen. Winamp has a built in feature that when ever you open Winamp it resizes itself to the same settings it was when you closed it. This way if you reboot or close out winamp for some reason, when you reopen it, it reappears on the touchscreen. No constant tweaking neccessary.

With the touchscreen setup for music, the remote for television, the wires run and the video card configured I can now watch television on my video card. Now we need to setup the sound to go from my pc speakers to the television without having to switch out wires.

more to come....

XLR and TRS/TS wiring

XLR
  • Pin 1 is the earth (or shield)
  • Pin 2 is the +
  • Pin 3 is the -

TRS/TS

mono
  • tip is the +
  • sleeve is the - or shield

  • balanced stereo jack
  • tip is the +
  • ring is the -
  • sleeve is the shield

  • stereo jack being used for a stereo signal (left and right)
  • tip is the left
  • ring is the right
  • sleeve is the shield
  • Saturday, February 17, 2007

    Converting Analog Home Video to Digital Home Video

    For some reason several people have asked me how to convert their analog home movies to DVD. There are several ways to do this and several routes to take.

    Utilizing DV Camcorders

    If you already own a digital camera and know how to successfully take footage off of it to your computer, the next step is easy. Copy your analog tapes to DV and then copy to your computer. Many people would argue that their will be a degregation of video quality. I'm willing to bet your movies of little Billy were not recorded with the finest equipment and stored in temperature controled rooms on archive quality tapes.

    Another technique that we used in the early years of video editing (way back in the mid 90s) was to use our DV camcorders as a pass thru. Hooking up our DV camcorders to our PC via Firewire we then would hook our analog signal upto the DV camcorders inputs. Thus the cameras circuitry would convert the analog signal to a digital signal into our computers.

    Video Card and Software

    Another route is to go is to purchase a decent video card with analog inputs to capture video. With all the examples I'm giving, a video capturing software will be neccessary. You may also need video editing software as well. Capturing software captures video, editing software edits video (some editing software also does capturing).

    The range of software has become quite vast in recent years. Before (back in the 90s again) there was Adobe Premiere, Final Cut and AVID. Sure there were a handful of small time editing programs but these were the three that could do a vast array of things. Now a days everyone and their grandmother has a editing software program that comes with any video component or software package. Most of them can cut a decent image and almost any of them would be ideal for a home movie conversion. Things to keep in mind though that if you plan to use Adobe Premiere for editing and purchase a video card to capture analog, they began licensing video cards to work with AP after version 6 so most cards won't work with 6 and above (Adobe Premeire Pro is v. 7).

    Plain and Simple approach all in one box

    If you don't have a DVcamcorder or are uncomfortable buying a new video card then this is the best option that I've been suggesting to people. Buy a video conversion box. There are several to choose from but to get a decent picture, expect to pay about 50 to 100. Basically these boxes have a similar technology to what is already in your DV camcorder.

    Dazzle ($40-$120) was one of the first companies to start to make these for the consumer. Their first model even pluged into a parralel cable. They have gone on to make several other units but have not been able to hold there own. They have made several grades of capture devices and programs, but all in all there have been many more better devices out there.

    Sony DVM-DC1 media converter ($200-$400) is the more pro/consumer model. This was also a product we used a lot in film school. Many people believed that by using the camcorder as a pass thru you would burn out the circuitry. This device litterally took the insides of the Sony VX model of DV camcorders and put it on a box. We used these with a DV deck and it worked perfectly. It also has Firewire outputs on it, and I have always been a strong propent of Firewire (it isn't as fast as USB2.0 but anyone who has done editing knows that Firewire is where its at. And film looks better too :). )

    Best in Show: Plextor ConvertX PX-AV100U Digital Video Converter ($40 - $80) is a simple and affordable way to get the job done. With tons of positive feedback and its simple interface, this box is ideal for conversion. It can handle WMV, AVI, Mpg 1,2 and 4 and DivX. Comes with all the software you need to do simple conversion of Analog video to DVD. It connects to your computer via USB2 (sure, its not Firewire but I'm willing to get with the times)

    General Thoughts

    So all you have to do is convert it over and slap it to a DVD. Easy evening project. Things to keep in mind.
    1. Your end product is only as good as your source. Don't expect DVD quality on a VHSC dupe.
    2. Digital is not Latin for "forever". Just because you have it on DVD or CD, it doesn't mean its going to prestine forever. PC Magazine did a study were they tested burnt CDs. Put some on a dash board, put some in a desk, put some in a caddy, left some laying aound. After 5 years, no data was recoverable. Now yes, there have been advancements since they started this study almost 10 years ago. However my film instructor always told me, "make backups of backups and if you still can't sleep easy at night, take that time making backups". Store them in something relatively air tight and check on them every so often.
    3. Try not to bore people. Just because you have complete coverage of the '89 Thanksgiving Dinner, doesn't mean people want to watch it. Edit where you can and you will have less to do in your archiving.
    If all in all none of this seems appealing or too hard, then I highly recommending buying a console DVD burner. One of my friends have been using it for copying his favorite shows off of DVR and it is working splendidly. Just like when you copied that High8 to VHS you just plug your VCR into the DVD burner, hit play and hit burn. At the end of the '89 thanksgiving, hit stop.

    Any other questions or concearns, shoot me an e-mail.

    Tuesday, February 13, 2007

    PC on Television pt 2 (Computer)

    My computer is not outstanding. I primarily built it for daily computer activity and video editing. I always say that my next computer purchase will be a mac, but then I end up sinking another couple hundred upgrading my pc.

    Ways to watch your PC on your Televsion:
    There are many ways to set up your pc for television viewing and DVR (digital video recording).
    • Make a MythTV box. It by far isn't the easiest, but most popular. A general knowledge of Linux is mandatory. Making one of these for the sake of making one is on my list of todo.
    • For simple viewing of your video files on your television, you can modify an Xbox or purchase a current xbox360 or a ps3. By putting it on your network you can easily transfer files to it. It is a very nice setup, but with my option you can capture video onto your computer.
    • Using the output of your video card to watch on television. Which is the simple way I did.
    My PC has a mere 500mb of ram and a 1.53 gig AMD Athlon. My video car is a Nvidia GeForce4 Ti 4200 with AGP8X. I picked it up from a "Gamer" friend a couple of years ago for 50 bucks. I find it useful to know "Gamers". It is by far the cheapiest way to score equipment that is out of date for "Gamers" but overkill for VJs. They upgrade almost every 6 months. This card has S-video out and S-video in (10 years ago was the best way to transfer analog video). With the S-Video breakout cable there are also composite in and out, but we won't acknowledge that. It also has DVI output along with a standard VGA to do dual monitors out of the box (I will explain how I utilize that feature later).

    I prefer to use Ace Media Player for my video watching. This player is a media player that utilizes any codecs on your pc. This makes it simple to click on any file and put it in the playlist. However, if you watch a file that is in a anamorphic 16:9, it does not "crop" it to fill a 4:3 screen. It leaves it in a "scrunched" view. Luckily a majority of the video I watch is in a standard 4:3 or is a cropped 4:3 aspect ratio.

    I setup my video card to output to the television. I can also setup "hotkeys" with my video card so I can simply hit ctrl-m and it will switch from my monitor to my television.

    With this simple setup I can watch easily watch videos on my television using the cables I laid under my carpeting towards my television. With a few added bells and whistles I can make my viewing better.

    more to come....

    Tuesday, February 06, 2007

    PC on Television pt 1 (Layout & Wiring)

    Last winter I started to watch more and more television shows on my PC. With the layout of my small apartments living room the computer is less then 10 feet away from television. Even though the couch was in ideal position to watch both, I could hardly compare watching tv on a cheap 17" LCD monitor when I had my 36" Sony Wega just a head turn away.

    Sketchup of apartment living room

    Running the Cables

    When I moved into the apartment I had to snake my F-type coax under my carpet to the television. This is because Time Warner will not install cable in a rental unit if it passes a doorway. Seeing that I am a renter and my cable installer didn't get my winks and nudges, he left me a good length of cable and made me sign on my invoice that I wouldn't pass the doorway.

    With my current project I followed the path I took with my coax and fished a 20' RCA stereo line, a 20' S-Video cable and a Cat5e towards my television. Yes there is a bump in the carpet, but I make it clear to everyone not to step on it. Normally I wouldn't advise doing this, but with me being a renter you have to do the most unevasive way of making it look good.

    The key to fishing under carpet is the same as when fishing through anything. Don't force it. If you get snagged reapproach. You aren't just snaking under carpet but carpet pad as well. Carpet pad in heavily trafficed areas tend to wear out and become very thin. You can easily begin to bunch up the pad if you start bullying your way through. Take your time and avoid snags.

    Many people thought that I was doing overkill by running all those cables. With me being an Xbox owner, I could of easily moded my Xbox to show video (thats a future entry) and ran all the video on the Cat5e. By running S-video and audio I not only can watch pc on my tv but I am now able to send tv to my pc from the DVR enabling me to archive television shows.

    more to come...

    Monday, February 05, 2007

    Sony R70XBR2 vs Mitsubishi WD-65731

    Review of the Sony R70XBR2 and the Mitsubishi WD-65731. My review is based on AVS Forum articles, C-Net reviews and reading over the specifications and manuals. The final test was a sight on sight comparison. I saw the Mitsubishi and the 60” version of the Sony.


    Sony 70” SXRD RP KDS-R70XBR2
    pros
    • Better viewing angles
    • Sharper image
    • SXRD (branded LCOS technology)
    • Nicer looking cabinet (sleek)
    • Pc input slot
    • 1 S-video, 2 component, 3 composite, 3 HDMI inputs
    cons
    • Price
    • 60 lbs heavier
    • Replacement bulb 100 dollars more


    Mitsubishi 65” 1080p DLP WD-65731
    pros
    • Mitsubishi has a history of quality product (6 color DLP)
    • More menu options to adjust picture
    • More input options
    • 3 S-video, 2 component, 3 composite, 1 DVI-I, 2 HDMI
    cons
    • Horrible peripheral angle (reminiscent of early LCD monitors)
    • two HDMI input

    Sunday, February 04, 2007