My first electronic gadget: TP cable checker
April 18th, 2009
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.