Ole Bakstad's blog » cable http://dibon.net/wordpress About stuff that happens, when it happens, if it happens. Mon, 15 Jun 2009 20:08:57 +0000 en hourly 1 http://wordpress.org/?v=3.0.3 My first electronic gadget: TP cable checker http://dibon.net/wordpress/my-first-electronic-gadget-tp-cable-checker/ http://dibon.net/wordpress/my-first-electronic-gadget-tp-cable-checker/#comments Sat, 18 Apr 2009 21:32:04 +0000 Ole Bakstad http://dibon.net/wordpress/?p=106 Today I went to Omega Verksted at NTNU with the plan to check weather or not a TP cable is working. With some help from Espen Øyby, a friend, I got the design ready. After designing the circuit on the computer we printed it on a special paper, which we then laid on top of the circuit board. A couple of minutes in a powerful light it was ready for acid. When we took it out of the acid and washed of the photoresist I had my circuit board.

The entire thing is a quite simple circuit. It consists of 9 LEDs, 9 resistors, 2 AND port blocks and 2 female RJ45 inputs. After soldering everything  together it worked!

If your interested you can see the design layout here.

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