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Picture of RJ-45 key chain and rack
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This Instructable will show you how to make a cool colorful key chain and a rack for storing those key chains out of RJ-45 jacks and plugs.

Step 1: Materials

Picture of Materials
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there are two parts to this instructable.
the first part is the key chain, in order to make the key chain you will need the following:

tools:
1. RJ-45 plug crimper
2. cutting or sleeving tool
3. scissors

materials:
1. 2 pair or more network cable
2. RJ-45 plugs (male)
3. colored rubber protector for RJ-45 plug
4. key ring

the second part is the rack for the key chain. it is optional. in order to make the rack you will need the following:

tools:
1. depending on the type of wall and the type of mount.

materials : 
1. wall mounted box for RJ-45 jacks
2. RJ-45 jacks (female)
 
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harari (author)  rbarone24 years ago
There are crimper tools for 1$ in eBay (metal not plastic)
and 10 jacks for 2$

check out DealExtreme.com too.
Very cool idea for us geeks. Thanks
tqwerty4 years ago
Great idea!
cbatchelor4 years ago
I can see it using scrape cabling, an old patch panel, and free space on a rack for a key box.
Lindie4 years ago
Cool idea!
headdezoysa4 years ago
its looks like WIRELESS KEY!!!!!!!!!
Exocetid4 years ago
You need to sell these. Just a clever and imaginative idea. I could see these in the ThinkGeek catalog!
chamunks4 years ago
THIS ... IS .... Awesome!

How about you find a way to integrate a small LED and wire it a bit logically so that it can also double as a simple Continuity tester?
Mark AJA4 years ago
Many years ago I saw in an electronic magazine using a jack plug as a key.
A different resistor connected across the two pins was used.
If the correct resistance was read and did not change for a second or two then the electronic lock was opened.
The timed delay was used to not open if a variable resister was used.
Brad I.4 years ago
Love it! A great idea for organizing all the server keys I have to keep up with.
przem4 years ago
Nice and geeky idea :-)

I think this can be also used as a simple electronic coded key. By connecting the pairs of pins inside RJ plug in different combinations you can code several different keys. Then some circuit to interpret the code and there you go :-)
dodland4 years ago
Pretty cool idea! I like how one uses snagless cable, especially since they go in your pocket. Could also build a shelf with an old unmanaged 5 or 8-port hub or switch laying around.
crapflinger4 years ago
extra extra points if you make it an ethernet loopback at the same time, then you can take down people's layer 2 switches whenever you like
mrmath4 years ago
Pretty cool idea that could easily be implemented in a data center or some other such place. Extra points for geekiness are scored if used at home. Just a nice idea. Two thumbs up!
harari (author)  mrmath4 years ago
This was actually implemented at a server farm where i used to work (still being used today - should have put my name on it...). i don't use this at home but a couple of ex-co-workers walk around with similar key chains on their house keys (just for show, they don't have the rack at home)
jefersonrod4 years ago
very cool, nice.
matbh4 years ago
what a nice idea!!! i really enjoy it!
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