November 4, 2009

How to Crimp Network Cable

1. Pull the cable off the reel to the desired length and cut. I have a box of cable at one end of my shop and a mark on the floor 10' away. For cable lengths which are a fraction of ten feet, I eye-ball the length as I pull the cable out of the box (also, my feet are about one foot long). For longer cables, I pull it out to the ten foot mark and go back to the box and pull the remaining fraction or another ten feet. If you are pulling cables through walls, a hole in the floor, etc., it easier to attach the RJ-45 plugs after the cable is pulled. The total length of wire segments between a PC and a hub or between two PC's cannot exceed 100 Meters (328 feet or about the length of a football field) for 100BASE-TX (and 10BASE-T).

2. Strip one end of the cable with the stripper or a knife and diags. If you are using the stripper, place the cable in the groove on the blade (left) side of the stripper and align the end of the cable with the right side of the stripper. This is about right to strip a little over 1/2" of the jacket off the cable. Turn the stripper about one turn or so. If you turn it much more, you will probably nick the wires. The idea is to score the outer jacket, but not go all the way through. Once scored, you should be able to twist the end of the jacket loose and pull it off with one hand while holding the rest of the cable with the other. If you are using a knife and diags, carefully slit the cable for about an inch or so and neatly trim around the circumference of the cable with the diags to remove the jacket.

3. Inspect the wires for nicks. Cut off the end and start over if you see any. You may have to adjust the blade with the screw at the front stripper. Cable diameters and jacket thicknesses vary.

4. Spread and arrange the pairs roughly in the order of the desired cable end.

5. Untwist the pairs and arrange the wires in the order of the desired cable end. Flatten the end between your thumb and forefinger. Trim the ends of the wires so they are even with one another. It is very important that the unstripped (untwisted) end be slightly less than 1/2" long. If it is longer than 1/2" it will be out-of-spec and susceptible to crosstalk. If it less than slightly less than 1/2" it will not be properly clinched when RJ-45 plug is crimped on.. Flatten again. There should be little or no space between the wires.

6. Hold the RJ-45 plug with the clip facing down or away from you. Push the wire firmly into the plug. Now, inspect the darn thing... before crimping and wasting the plug! Looking through the bottom of the plug, the wire on the far left side will have a white background. The wires should alternate light and dark from left to right. The furthest right wire is brown. The wires should all end evenly at the front of the plug. The jacket should end just about where you see it in the diagram--right on the line. Aren't you glad you didn't crimp the plug?

7. Hold the wire near the RJ-45 plug with the clip down and firmly push it into the left side of the front of the crimper (it will only go in one way). Hold the wire in place squeeze the crimper handles quite firmly. This is what will happen:

(Crimp it once.) The crimper pushes two plungers down on the RJ-45 plug. One forces what amounts to a cleverly designed plastic plug/wedge onto the cable jacket and very firmly clinches it. The other seats the "pins," each with two teeth at its end, through the insulation and into the conductors of their respective wires.

8. Test the crimp... If done properly an average person will not be able to pull the plug off the cable with his or her bare hands. And that quite simply, besides lower cost, is the primary advantage of twisted-pair cables over the older thinwire, coaxial cables. In fact, I would say the RJ-45 and ease of its installation is the main reason coaxial cable is no longer widely used for small Ethernets. But, don't pull that hard on the plug. It could stretch the cable and change its characteristics. Look at the side of the plug and see if it looks like the diagram and give it a fairly firm tug to make sure it is crimped well.

9. Prepare the other end of the cable so it has the desired end and crimp.

10. If both ends of the cable are within reach, hold them next to each other and with RJ-45 clips facing away. Look through the bottom of the plugs. If the plugs are wired correctly, and they are identical, it is a straight-thru cable. If they are wired correctly and they are different, it is a crossover cable.

11. If you have an operational network, test the cable. Copy some large files.

12. If the cable doesn't work, inspect the ends again and make sure you have the right cable and that it is plugged into the correct units for the type of cable. Try power-cycling (cold booting) the involved computers.

13. If you have many straight-thru cables and a crossover cable in your system, you should consider labeling the crossover cable or using a different colored cable for the crossover cable so you don't mix them up. I do not recommend implementing the crossover function, as recommended elsewhere, with two RJ-45 jacks, appropriately wired back to back, and two straight-thru cables. This method costs noticeably more, introduces more than the necessary number of components and connections, increases the complexity and time of assembly, and decreases reliability.

How to install External Bluetooth adapter inside the Laptop

Here’s how I installed an external USB Bluetooth adapter INSIDE my laptop and made it internal. My laptop wasn’t Bluetooth ready, it didn’t have internal Bluetooth connector and antenna but I needed it in order to access the cell phone without running a cable.

My first option was using the external USB Bluetooth adapter as is but it wasn’t very convenient. I decided to find a way to install this adapter inside the laptop.

Before I started hacking my laptop, I installed Bluetooth software and tested if the new adapter works fine. As you see on the picture below, the Bluetooth icon in the SysTray is active and the cell phone is detected.

For this modification you’ll need:
1. Laptop disassembly experience. Here are service manuals for some laptops.
2. Soldering skills and tools as I mentioned in the power jack repair post.
3. Inexpensive USB Bluetooth 2.0 adapter. I spent less than $8 for that thing and you can find it even cheaper.

This is only for experienced technicians. If you have no experience you can (and most likely will) damage your laptop. Proceed on your own risk!

This guide should works for all laptop brands: Toshiba, Dell, HP/Compaq, IBM, Lenovo, Gateway, etc… as long as you have enough space to mount the Bluetooth module inside the laptop.

OK, here’s how I did it.

First of all, I disassembled my laptop and found a place where I can install the Bluetooth adapter. In my guide I’m using a Toshiba Satellite A105 laptop. I found enough empty space in the top right corner of the laptop.

My idea was simple. Disassemble the Bluetooth adapter, remove the Bluetooth module and solder it to one of the USB ports. I decided to use one of the USB ports located in the lower right corner.

NOTE: After this modification is done, you will not be able to use that particular USB port with any other USB device, it will not work because it’s dedicated to the Bluetooth module. But I think it’s not a big deal because most laptops have 3-4 USB ports.

I found some thin wires laying around.
Make sure that wires are long enough for your project.

Now you’ll have to disassemble the adapter. I easily split the adapter case with a sharp knife and removed the Bluetooth module.

Unsolder the USB connector.

As you see on the picture below, the Bluetooth module easily fits into the empty place inside the laptop.

I soldered four wires to the Bluetooth module. I used terminals for the USB connector.

After that I soldered four wires to four contacts on the back of the USB connector. Be careful. Make sure all wires are connected correctly.

At the last step I installed the Bluetooth module into the place and routed wires from the module to the USB port. I had to reroute the wires a few times to make sure that I can install the top cover and it seats properly. I secured wires to the motherboard with electrical tape.

Finally, assembled the laptop and tested it. There is no on/off hardware switch for the Bluetooth module but I can turn it on and off through software.

The Bluetooth adapter has been installed INSIDE the laptop and works flawlessly!


Access Gmail from the taskbar-Windows 7

Windows 7 classic start menu

Windows 7 classic start menu

Classic start menu – For those prefer to use the old classic start menu, you guys can choose to install this little application called CSmenu.

Gmail Notifier Plus

Gmail Notifier Plus

Access gmail from Gmail from the taskbar – This is a good software for those using gmail, Gmail Notifier. It will alert you at your desktop, each time you receive a new email.



Stack your icon and folder neatly – Another great piece of software that allow you to stack up your folder neatly. StandaloneStack and 7stacks

Ninite easy pc set up

Ninite easy pc set up

Install all your prefer application at once – Head over to this site ninite choose the appplication you want and then download the installer to your computer. This will save you a lot of time in installing each application individually.

Registry Cleaner-Glary Utilities

Glary Utilities

If you are looking for a single utility which can fix, speed up, maintain and protect your PC, Glary utilities are for you. You will get a good registry cleaner, Startup manager, File splitter, Memory optimizer, Secure file deleter, Uninstaller, Disc space analyzer, Short cut fixer and more by simply installing Glary Utilities. The program automatically creates a backup copy before making important changes to your system. If you require a registry cleaner only then EUsing registry cleaner is also a good option.
All Glary Utilities tools can be accessed through an eye-pleasing and totally simplistic interface. 1-Click maintenance option of Glary utilities includes Registry cleaner, Shortcuts fixer, Startup manager, Temporary files cleaner, Tracks eraser and spy remover. For internet explorer users it has got an explorer assistant also. Windows default functions that can help you to keep system stable can be directly accessed from Glary. It includes Check Disk, Disk defragmenter, System restore, System file checker and Backup utility.

Why I recommend Glary utilities.
  • It provides almost complete Tweaking tool kit for your system
  • Good registry cleaner
  • Makes backup before important changes
  • Very useful 1-click maintenance.
  • Very easy interface
  • Great file splitter and rejoiner


Registery Scanner For Free Downloads-Nersoft

RegScanner -Scan registries as you like

RegScanner is a handy small utility created by Nirsoft, which can scan your registry to find a desired registry value or values modified in a specific time period.If you want to modify the registry values in RegEdit you can do it by simply double clicking it.You can export or save registry values for editing if you like.
The greatest advantage is that all the registry values are displayed in a single list. RegScanner can even find a unicode string located inside a binary value.

  • If you want to view all Registry values under a specific key, choose 'Registry item contains any value' in the matching combo-box, uncheck the 'Scan the following base keys', and in the Base Key combo-box type the desired key (For example: HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer)
  • If you want to view the list of all Registry keys that have been modified in the last few hours or days, check the 'Add entry for each found key' and 'Add only keys' options, choose 'Registry item contains any value' in the matching combo-box, choose the 'Display only keys that their modified time is within the following range' option, and then select the modified date/time range that you want to view.