Archive for the 'Technical' Category

Convert an HP computer power supply to a hobby desktop power station!

Tuesday, September 16th, 2008
Top Side shot of Power Supply

So, I’ve got all these hobbies and interests that require a few different voltages.  I’ve got a lot devices that require 12v DC and it looks like half of those come standard with car adapters.  I also play around with some servos, some LED projects and some other stuff that require less than 12V DC and a few that need more.  What’s a guy to do?

Yes, I could have taken the reasonable approach, that I’m sure most of you would have taken, and just purchased a variable bench power supply or a few separate specific converters. Yeah, yeah, yeah, whatever.  I took it on as a personal goal to convert a standard computer power supply to a variable output DC desktop test rig.  Easy, right??  Kinda.

Let me get it out right up front that the reason I took on this project, as with most of my projects, was for the sheer satisfaction of turning out a functioning product.  Once I was able to get the wiring down right, the rest was a snap.  And, more importantly, almost everything I used for this project was laying around in various states of non-use so the total cost was almost nill.

Power Supply Power Side
Here’s a side shot of my Frankensteined power supply.  I was able to pull out all the standard voltages.  I also threw in a cigarette lighter plug (the only real cost) so I could charge up some of my devices that ONLY came with that type of plug.  (Some of my RC gear).  As you can see by my lousy handwriting, I fused up the cigarette lighter adapter (came with) and the main +12v plug since that will be the most used.  Future additions will include fuses for all voltages and an amp meter.  Maybe even a potentiometer or two…
The biggest time killer on this project was trying to figure out what wire colors corresponded to what.  I used some standard references on the Net but they were only partially helpful.  Leave it to HP (actually, it was a Compaq branded PC) to not play by the ATX standards.
Power Supply Plug Arrangement
This should give you some insight into how the power supply needs to be hooked up.  I switched the Green and White wires for the on/off switch and put a load between the +5v and ground.  A couple of banana jacks, a couple of LEDs (don’t forget the resistors!) and walla, she is done!   Worked like a charm!  Actually, I put both LED grounds together which somehow caused the system to start and then fail.  After putting them to different grounds I’ve never had another problem.
WARNING / CAUTION / DANGER
Hey, don’t forget.  There are some LARGE capacitors in these boxes and they can take a while to discharge.  Don’t mess around with these!

“Locate Link Browser” when you click on a URL in Outlook 2003

Thursday, August 16th, 2007

Notice a relatively new problem when you click on a URL in your Outlook? Does it pop-up a window saying “locate link browser”? Pain in the ass? You bet!

Found this on the web and it worked like a charm!

Click START
Click RUN
Enter regsvr32 Urlmon.dll and hit ENTER

It should pop up with a successful message and it should never rear its ugly head again.

MAC OS X and HP Laserjet 1022 Print Driver

Tuesday, August 14th, 2007

For those of you that own a Mac AND an HP Laserjet 1022 AND would like to use them together, you may run into the same problems I have. Perhaps my troubles and tribulations can benefit your plight. Or, maybe I’ll just give you the answers you seek. Yeah, that’s probably better…

First, let me explain the problems I ran into. I just purchased my brand new spankin iMac. (OS X 10.4.10)  Lo and behold it was a glorious site, all new and shiny. But alas, I tried to print to my HP 1022 and was rebuffed. I was thwarted. It tasked me!!! Kaaaaaaaaaaahn!

Ok, the problem. My 1022 is not connected directly to the iMac. It’s USB connected to an Ethernet Print Server. When I went into my printer setup, I could input the IP address of the print server but couldn’t see the HP 1022 driver. I downloaded the “new” driver from the HP website - didn’t work. I downloaded the “old” Hp drivers from the Net as suggested - didn’t work. I downloaded the drivers from the CD, zippo, bubkas, nada, zilch. I tried moving files into the root “laserjet” directory, restarts, and everything else people suggested on the net. Goose Eggs. HOWEVER, if I plugged the printer directly into the Mac via a USB cable, WHAMMO, the printer was recognized and everything worked perfectly. Back through the print server, same problem. Wow is me….

Local printer - drivers work.

Network printer - drivers don’t appear at all.

After much searching, here’s what worked for me, immediately, without issue, no muss, no fuss, it diced, it chopped, it even julianed and I didn’t have to call before midnight. It was better than the bass-o-matic.

http://www.linux-foundation.org/en/OpenPrinting/MacOSX/foo2zjs

Three file downloads, several mouse clicks and when I went to select my printer model, I choose HP and then the (HP Laserjet 1022 Foomatic / foo2zjs ) Perfect!!!

For some of the printers there is of course a small caveat. Do not pass go, do not collect the $200, mileage may vary, limited to the vehicles on the lot. Some the HP printers require a firmware download every time they’re powered off/on.

Oh, and this process also supports the following printers:

Good luck!!

SPAM - No matter how hard you try…..

Wednesday, July 25th, 2007

SPAM - Can’t live with it, can’ find the FU@$ERS to kill them!

Everyone who’s ever used Email in their life has had to deal with SPAM. Some more than others. We’ve all learned that giving our Email address to unscrupulous online merchants can leave you showered with Penis Enlarger Ads or requests to launder some money for an ousted Dictator. What can you do????

In the long run, for now, the best you could possibly hope for is to minimize your exposure because NO MATTER HOW HARD YOU TRY, someone you know, someone who had YOU in THEIR contacts list is going to open someone else’s SPAM message, infect their machine with a virus and have EVERY SINGLE CONTACT STRIPPED OUT like my Aunt Ruth sucking the marrow from bone. Sluuuuuuuuuuuurp, done!

MAYBE use a SPAM filter. Good for some, bad for others. None are perfect and many take up more of your time that just killing the SPAM messages in your inbox. Just remember though, not everyone uses their Email in the same way so some of these may be the perfect match for you, a godsend you might say. Me personally? I have yet to find one that isn’t more of a pain than what it’s trying to cure but I’m a bit more odd than others.

DO use free 3rd party Email programs (Yahoo, Hotmail, Google) to communicate with cataloges, merchants and any online transactions.

DON”T give out your primary Email address to any commercial entity. Yes Virginia, even the “scrupulous” vendors find the profit of reselling your addresses too hard to resist.

DON’T ever, EVER (No, really EVER!!!) respond to a SPAM message which offers to “take you off the list”. If you do I bet you could hear them sporting wood if you listen carefully enough! By doing this you’ve taken your name off of the “could still be a good address” list and immediately moved it to “VALID, VALID, HIT ‘EM NOW” list which trades for more money and trades much more often. You might as well paint glow-in-the-dark Bull’s Eye on your forhead.

Funny Story.  I once took it upon myself to try and go after SPAMMers by targeting the ISP’s and Companies they used as senders.  After about a year of very diligent work, tracking addresses, checking open relays, and rooting around to find responsible parties I’d have to say that about 0.001% of it worked.  Even when (this was a few years back) the content was HIGHLY objectionable, no one gave two sh#@s.  I even tried to get my Local, State, Federal officials (You know, the people who we elected to work for “us”) to get involved.  I was completely ignored.  I even had several cases involving what appear to be SPAM featuring child pornography and I couldn’t get ANY legal authority to give me the time of day.  And, after all of this work, what did I get?  I was put on EVERY G@D DAMNED SPAM list in existence.  Holly Hanna did I get SPAMed.  I still keep that account active today just to peek at it from time to time as a reminder.

DO (yes, this is the biggest pain in the ass) change your Email address from time to time. Nothing works better than changing your address. DO NOT CHANGE IT AND THEN FORWARD ALL YOU EMAIL! This will accomplish nothing. However, that being said, you can do this for a short period of time to make sure you let all your friends know but you really need to kill it sooner than later.

The absolute, 100%, never get SPAM, only get the Email you want method? Yeah, I thought that was a hoot too!

D-LINK DP-301U USB Print Server FW: 2.10 b2

Friday, July 20th, 2007

UPDATE AT BOTTOM:

For anyone who’s purchased a D-Link DP-301U. First, my condolences. Second, if for some reason you have an HP LaserJet 1010, 1022, 1060 or an Epson Color Laserjet 2600N, 3500 or a 3550, you’re not going to get this to work unless you’re running Firmware 2.10. Let me again stress my sincerest condolences. In my humble opinion, this product is a total piece of crap, the included PS ADMIN program was a piece of shit when it was first released and surprise-surprise, it’s STILL (again, in my humble opinion) a total and useless piece of shit.

No, really, I’m getting better at hiding my feelings!! This problem started when a client of mine received their new DP-301U (Yes, no matter what you tell some people they’ll still buy cheap and then spend big bucks on having someone come in and make it work). The client flashed the firmware to D-Links NEWEST AND GREATEST firmware available on their website. UNFORTUNATELY, it’s a revision behind what ships with the unit from the factory and that small difference makes the printers above work, or not work now. Not to mention it didn’t warn about or refuse to DOWNGRADE, it just whistled a little tune and lobotomized (spell checker suggested sodomized, kinda like that better!) the box. Emailed D-Link with no answer. Called D-Link with no workable solution unless we wanted to RMA the unit, at our cost of course. NOT ACCEPTABLE! D-LINK SUPPORT (IMHO) FRICKEN BLOWS!!! If the answer doesn’t flash up on their computer screen they have NO F’ING CLUE!!

Wow, cup of decaf please!! After a few minutes of surfing the web I found a link to a Chinese website that seemed to have the right file names. I downloaded the firmware with the associated PDF, everything unziped correctly and looked to be in English, I threw the Firmware onto the box and EASY PEASY, LEMON SQUEEZY the box came up and started printing the queued jobs… Hate D-Link, please do not buy D-Link, I used to swear by their consumer stuff but (IMHO) lately it’s all gone to crap and their support (or lack of) has blazed that trail.

Regardless of your decisions, if you do happen to have one of these boxes and are in need if the Firmware 2.10 file, here are some links that will help you out. Standard disclaimers apply; These are not my files, there are no warranties expressed nor implied, use these files at your own risk, if these files slag your box - too bad, it’s all you man, yada yada yada…

D-LINK DP-301U Firmware 2.10 File

D-LINK DP-301U Firmware 2.00 File

PDF

UPDATE: Four Days Later

Spleen vented, product working. I feel obligated to tell you that I did finally get an Email from D-Link Tech Support. Not only that, the guy actually sent what I needed. Not only that but he went OUTSIDE of D-LINK’s company to get the file. No Shit! Color me impressed. The tech basically did what I had done. He went to a 3rd party website to find the 2.1 Firmware and sent me a copy. He didn’t explain as to why it was not available on their website but he DID get me the file.

I’ll still stay with hating D-Link but I will admit that their tech support guy DID come through in the end. Thanks D-LINK Support!!!

I think I need to gargle now to get that bad taste out of my mouth….  ;-)

Protected: Cisco Wireless Bridge w/ Repeater - Will Not ARP Local Addresses

Tuesday, January 2nd, 2007

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