Archive for April, 2009
Ever needed to see if a network point is live? Using POE? Then this might be able to help.
All it does is put the 48v from POE through a couple of power resitors to somthing the LED’s can handle. I’ve wired this up so it can deal with the proper POE standard and the Cisco standard.
Unfortunatlly it doesn’t seem to work with all Cisco routers but it passed some time making it!
A friend of mine wanted to be able to set off some fireworks from a safe distance. After a little research it was decideced that off the shelf products were too expensive, so I came up with this.
At it’s heart all this does is create a short circuit accross a 10 ohm resistor. 12v will do a pretty good job of melting the resistor which would be simply taped to the firework fuse. As you can see in the following pictures it is simply powered by a 12volt cordless drill battery and even comes with it’s own carry case.
I’m sure you can work out how this multiple system works from the pictures
After an intense google-fu workout session ending in failure I may be the only person in the word interested in doing this but here goes…
Use Google Reader? Want an RSS feed of only unread item? Then hears how!
The secret is subtraction, you need to take your reading-list feed and remove all items with a read tag.
As an example here’s what the reading-list and read feed url’s should look like
http://www.google.com/reader/atom/user/YOURUSERIDGOESHERE/state/com.google/reading-list
http://www.google.com/reader/atom/user/YOURUSERIDGOESHERE/state/com.google/read
Too find out your user ID go to reader.google.com and then enter this line of javascript into the address bar
javascript:prompt(“User ID”, _USER_ID);void(0);
you should then get a popup with your ID
So to get the unread feed you put it all together like this
http://www.google.com/reader/atom/user/YOURUSERIDGOESHERE/state/com.google/reading-list?&xt=user/YOURUSERIDGOESHERE/state/com.google/read
So now I’ve got the Vista RSS Feed gadget (running on XP just to be awkward) displaying a list of my unread items.
Yay!