usb - Dave's Blog


Tweet from David_Risney

2015 Jul 21, 12:59
"Chrysler’s patch must be manually implemented via a USB stick". Maybe hire the hackers to help you out with OTA updates.

Retweet of linkalis

2015 Mar 15, 9:30
Was skeptical at first, but now I'm sold! "USB Type-C Explained: What It Is and Why You’ll Want it" … @howtogeek

Very Serious Button

2014 May 17, 1:34

A physical big red button that is a USB keyboard with a configurable single key. This looks wonderful. I’ll take 26.

RT @codinghorror The Very Serious USB Button

PermalinkCommentshumor hardward big-red-button

VIM Clutch is a USB pedal for VIM users: When the pedal is...

2012 Jun 21, 4:39

VIM Clutch is a USB pedal for VIM users:

When the pedal is pressed down, the pedal types “i” causing VIM to go into Insert Mode. When released, it types and you are back in Normal Mode.

PermalinkCommentshumor technical vim

veryseriousbusiness: oldie but goodie, go to google translate...

2012 May 7, 1:02


oldie but goodie, go to google translate and paste this in, turn it to GERMAN and hit the listen button.

pv zk bschk pv zk pv bschk zk pv zk bschk pv zk pv bschk zk bschk pv bschk bschk pv kkkkkkkkkk bschk bschk bschk pv zk bschk pv zk pv bschk zk pv zk bschk pv zk pv bschk zk bschk pv bschk bschk pv kkkkkkkkkk bschk bschk bschk pv zk bschk pv zk pv bschk zk pv zk bschk pv zk pv bschk zk bschk pv bschk bschk pv kkkkkkkkkk bschk bschk bschk pv zk bschk pv zk pv bschk zk pv zk bschk pv zk pv bschk zk bschk pv bschk bschk pv kkkkkkkkkk bschk bschk bschk pv zk bschk pv zk pv bschk zk pv zk bschk pv zk pv bschk zk bschk pv bschk bschk pv kkkkkkkkkk bschk bschk bschk

now turn it to JAPANESE, hit listen…LOL

PermalinkCommentshumor google translate beatbox audio german

Make: Online » Morse For The Hard-Core: Replace Your Keyboard with a Key

2011 Feb 25, 2:08PermalinkCommentshumor morse-code keyboard usb technical

How Flash Drives and Social Engineering can Compromise Networks

2010 Jan 22, 1:44"He seeded the customer's parking lot with USB flash drives, each of which had a Trojan horse installed on it. When the employees arrived for work in the morning, they were quite excited to find the free gadgets laying around the parking lot. Employees eagerly collected the USB drives and plugged them into the first computers they came across: their own workstations."PermalinkCommentsvia:ericlaw security usb windows social-engineering computer technical

Comcast Digital Switch Impact on My Windows Media Center

2009 Sep 25, 2:19

Amateur wireless station (LOC)Irritatingly out of line with what their commercials say, in my area Comcast, under the covers of the national broadcast digital switch, is sneaking in their own switch to digital, moving channels above 30 to their own digital format. Previously, I had Windows 7 Media Center running on a PC with a Hauppauge PVR500 which can decode two television signals at once setup to record shows I like. The XBox 360 works great as a Media Center client letting me easily watch the recorded shows over my home network on my normal TV.

Unfortunately with Comcast's change, now one needs a cable box or a Comcast digital to analog converter in order to view their signal, but Comcast is offering up to two free converters for those who'd like them. The second of my two free converters I hooked up to the Media Center PC and I got the IR Blaster that came with my Hauppauge out of the garage. I plugged in the USB IR Blaster to my PC, connected one of the IR transmitters to the 1st port on the IR Blaster, and sat the IR transmitter next to the converter's IR receiver. I went through the Media Center TV setup again and happily it was able to figure out how to correctly change the channel on the converter. So I can record now, however:

  1. I can only record one thing at a time now
  2. Changing the channel is slow taking many seconds (no flipping through channels for me)
  3. The Hauppauge card can't know if the channel change worked. So if it tries to change to HBO (I get it for free with one of the Comcast packages) which is encrypted and the converted won't show, the channel doesn't change but the PC doesn't know it and ends up recording some other channel.
To fix (3) I need to manually go through and remove channels I don't have from the Media Center. To fix (1) I may be able to get a second IR transmitter, a third digital converter, hook it up to one of the other inputs on my Hauppauge, and go back through the Media Center TV setup. There's no fix for (2) but that's not so bad. All in all, its just generally frustrating that they're breaking my setup with no obvious benefit.PermalinkCommentsdigital tv hauppauge mce cable windows media center comcast

Back from California

2008 Dec 30, 2:29

Sarah and Me at ChristmasSarah and I are back from a short Christmas visit to California. We spent the days around Christmas with much of my extended family in Sacramento many of whom I had not seen in quite a while. It was nice to see everybody again. I ended up taking a few pictures on Christmas in order to add to the digital photo frame I gave Grandma.

San Francisco Pier at NightWe flew in and out of San Francisco on Virgin America which was really nice. The staff is trying their best to be hip but accessible, the safety instructional video is entertaining, there's mood lighting, and all seats have entertainment systems as well as power outlets and USB ports to charge your electronic devices. They don't have many flights which appears to mean shorter lines. And it was cheaper to fly with them and then rent a car and drive to Sacramento then to fly in to Sacramento. I'll for sure be flying with them again given the opportunity. Before flying back Sarah and I spent a day in San Francisco, where we decided that if we don't go back to Fisherman's Wharf again in this lifetime that would be acceptable, saw the Golden Gate Park and met up with my friend Jake who I haven't seen in at least four years. Next up, happy new year!

PermalinkCommentschristmas virgin america family personal san francisco

Evil Mad Scientist Laboratories - How to make a Sawed-off USB Key

2008 Jul 17, 5:39DIY instructions on making a flash drive that looks like a cut up USB cable: "Holy crap-- somebody just went and TORE MY FREAKING USB CABLE IN HALF while it was still attached to my laptop!!! No-- wait-- sorry. That's just my USB drive. My bad. Never mindPermalinkCommentsdiy humor flash usb tutorial

Finished First Three Zelda Games

2008 Jul 17, 4:45
Screen shot from Legend of ZeldaScreen shot from Zelda II: The Adventures of LinkScreen shot from Legend of Zelda: A Link to the Past

I want to once again profess my love for the Wii's Virtual Console. Sarah and I recently finished playing through the first three Zelda games. Although I'd played a bit of the first two I never had a Nintendo as a kid and so unlike Sarah this was my first time completely playing through Zelda I & II. What people say about Zelda II is true... its all so true. And on the flip side I have fond memories of beating the third Zelda game which Sarah hadn't played.

In hilarious Zelda related news, a friend from work's husband posted the following blog post concerning their son named Link.

PermalinkCommentszelda link video-games nontechnical wii

ThinkGeek Bluetooth Retro Handset Review

2008 Mar 23, 1:25

I ordered a ThinkGeek Bluetooth Retro Handset to use at home. When I come home I plug my phone in to charge in my room, but then I can't hear it ring elsewhere in the hosue. The idea was to take this handset which wirelessly connects to cellphones via bluetooth and place it in another part of the house so that I can tell I'm getting an incoming call. The only issue I have with that setup is that it ringing isn't any louder than conversations held over the phone, that is, the ringing is a little quiet.

The handset pairs with cellphones in the same manner as any other handset over bluetooth. It has an internal rechargeable battery which is charged via a standard USB port built into the base of the handset and it comes with a USB cable. Next to the USB port is the only button on the phone which is pressed to answer a call, hang up a call, or begin voice dial, held down to turn the handset on and off, and held down longer to begin pairing with a cellphone. There's a blue LED in one of the holes in the microphone portion of the phone which blinks to indicate if its on or trying to pair. Transitioning between on, off, and pairing produces a cute sound and a change to the LED.

Overal I'm pleased with its simplicity and use of common parts although I wish there was a way to adjust the volume of the ring.

PermalinkCommentsthinkgeek bluetooth cellphone phone product handset

Backup Notes

2007 Jul 13, 8:30I bought an external backup drive a few weekends ago. I've previously setup a Subversion repository so I decided to move everything into the repository and then back it up. So in went the contents of all of my %USERPROFILE% and ~ directories with a bit of sorting and pruning. Not too much though given its much easier to dump in everything and search for what I want then to take the time to examine and grade each file. What follows are the notes I took while setting this up. It takes me a bit of time to look up the help on each command so I figure I'll write it all down here for the benefit of myself and potentially others...

Setting Up the Backup Drive For Linux
I first changed the filesystem on the drive to ext3. I plugged it into my USB2.0 port and ran fdisk:

sudo fdisk /dev/sda

Useful commands I used to do this follow mostly in order:
print current partitions
delete current partition
create new partition (I used the defaults)
write changes and exit
Then I formatted for ext3.

sudo mkfs.ext3 /dev/sda1

I made it easy to mount:

sudo vim /etc/fstab
# added line to end:
/dev/sda1 /media/backup ext3 rw,user,noauto 0 0

I setup the directory structure on the disk

mount /media/backup
sudo mkdir /media/backup/users
sudo mkdir /media/backup/users/dave
sudo chown dave:dave /media/backup/users/dave

After all that its easy to make a copy of the Subversion repository:

mount /media/backup
cp -Rv /home/dave/svn /media/backup/users/dave/
umount /media/backup

Next on the agenda is to add a cron job to do this regularly.

Subversion Command Reference
On a machine that has local access to the Subversion repository you can check out a specific subdirectory as follows using the file scheme:

svn co file:///home/dave/svn/trunk/web/

Note also that although one of my directories is named '' Subversion requires the '@' to be percent-encoded.
Other useful subversion commands:
svn help
svn list file:///home/dave/svn/
list all files in root dir of svn depot
svn list -R file:///home/dave/svn/
list all files in svn depot
svn list -R file:///home/dave/svn/ | grep \/$
list all directories
svn status
List status of all files in the working copy directory as in - modified, not in repository, etc
svn update
Brings the working copy up to date wrt the repository
svn commit
Commit changes from the working copy to the repository
svn add / move / delete
Perform the specified action -- occurs immediately

Setting up Windows Client for Auto Auth into SVN
When using an SVN client on Windows via svn+ssh its useful to have the Windows automatically generate connections to the SVN server. I use putty on my Windows machines so I read the directions on using public keys with putty.

cd .ssh
vim authorized_keys # leave the putty window open for now
Click the 'generate' button
Move the mouse around until finished
Copy text in 'Public key for pasting into OpenSSH authorized_keys file:' to putty window & save & close putty window
Enter Key passphrase & Comment in puttygen
Save the private key somewhere private
'Add Key' the private key just saved.

Checking out using Tortoise SVN
On one of my Windows machines I've already installed Tortoise SVN. Checking out from my SVN repository was really easy. I just right clicked in Explorer in a directory and selected "SVN Checkout...". Then in the following dialog I entered the svn URI:


Note again that the '@' that is part of the directory name is percent-encoded as '%40' while the '@' in the userinfo is not.

Windows Command Line Check Out
On my media center I didn't want to install Tortoise SVN so rather I used the command line tool. I setup pageant like before the only difficulty was getting the SVN command line tool to use putty. With the default configuration you can use the SVN_SSH environment variable to point at a compliant SSH command line tool. The trick is that its interpreted as a backslash escaped string. So I set mine thusly:

set SVN_SSH=C:\\users\\dave\\bin\\putty\\plink.exe

The escaping solved the vague error I received about not being able to create the tunnel.PermalinkCommentsbackup technical personal windows svn linux subversion

Wiimote wiissues

2007 Jun 7, 5:29The other day I had the best idea for my Wii remote. Clearly I should use it to control the rotation of Tetris pieces in my N-dimensional Tetris game Polytope Tetris. One of the issues I described with Polytope Tetris is user input. Given a Wii remote the user could rotate a piece through 3 dimensions in a manner that's much easier to adjust to than particular keys on the keyboard.

Anyway, I did a little research into how this might work. I knew that the Wii remote used infrared for absolute positioning and Bluetooth for everything else (LEDs, speaker, accels.) I bought a Bluetooth adapter for my PC after realizing that none of my computers had one already. I used GlovePIE to ensure that my Wii remote could connect and successfully communicate with my computer. GlovePIE is actually pretty cool -- it provides a simple script layer over the Wii remote to control things like your mouse.

Since Polytope Tetris is in Java I looked for and found a Java library for operating with the Wii remote and a long forum thread discussing its use. I then read up on Bluetooth in Java. Apparently JSR 82 is the name of the standard that describes the API a Bluetooth stack should expose in Java. That is, to get Bluetooth working in Java one needs an additional package for Java that actually implements the Bluetooth Java API. This package would depend on the system so I suppose I can't fault Sun for not including it... Where to find such a package? I found a comparison list of implementations and tried the ones that support javax.bluetooth. None of them worked for me because none can address USB devices it seems or they cost money and I couldn't get the trial version working. I also tried bluesock (not listed on the previous list) which seemed promising and could produce an address for my Wii remote as a connected device but couldn't use that address.

And I thought that after I found the Wii remote Java library it would be easy... Oh well...PermalinkCommentsjava bluetooth wii technical remote jsr82 tetris polytopetetris wiimote

Customer Reviews Of Aluratek ABD2020 Bluetooth Wireless 2.0 EDR USB Adapter - Retail

2007 May 11, 1:11Review of a USB Bluetooth adapter. Several reviews claim that it works with Wii remote.PermalinkCommentsbluetooth hardware purchase shopping usb review research:wii-remote

jUSB: Java USB 

2007 May 11, 12:17Java API for using USB devices. May be possible to use JavaBluetooth with USB Bluetooth dongle if also using jUSB.PermalinkCommentsjava library api usb research:wii-remote

USB Documentation

2005 Apr 24, 12:12PermalinkCommentsusb reference development
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