Lets look inside Nomad the final chapterPosted: October 20, 2011
With a melted PCB the front panel was as dead as an Aqua concert. So now I was faced with the prospect of having to rewire everything with a fresh LED PCB, providing I was able to get one.
Luckily as it was and I ended up buying two, as I knew what my luck was like.
Rewiring the front panel for a second time actually turned out to be very useful. As I was not only able to shorten the wires going from the regulator to the PCB, but also those from the PCB to the 4 LED’s on the front panel. Allowing me this time, the ability to mount the PCB on to the rear of the front panel. Once more using the handy retro 70’s solder/ray gun. I was able to get the whole job done in a surprisingly short space of time, not to mention ease.
Having done my research, I installed a 20 ohm resistor between the voltage out of the regulator and the PCB, preventing the circuit from drawing to much current. I had infact bought a 15 and 20, in anticipation of a 20 ohm resistor making the LED’s too dim. Luckily this wasn’t the case. After a quick test on the low voltage PSU proved the new circuit was working properly, I went about testing the larger Uniross. It was some time after all this, that I was to discover the Uniross was not actually powerful enough to boot the motherboard, not even as far as posting. But now I’m wondering off, so back to hooking things up.
With everything wired up on the kitchen side, I held my breath and press the power button, at first nothing, but then pressing a little harder the front panel came to life. five minutes passed and the blinkers where still working, I flicked through the patterns for a good 10 minutes, waiting for signs of over heating. Not a hint, the 20 ohm resistor had done it!! Hurrah
Powering the machine down, I went about placing the case back together. While the biggest hurdle was now over with, the next challenge, the one I had been dreading was finally upon me. Finishing the front panel. While the LED’s blinked, the Power LED worked, the Reset and Pattern change toggle switches worked. But the one thing which it needed was writing under each LED and switch, indicating what they where. How the heck was I going to do it? Decal’s? No, as I didn’t own a printer capable of printing white ink and yes they do make them. Etching? no as that would cost me a fortune and this was a budget, home brew project. It had to be something I could do myself. So after a lot of thinking, I stole and idea from my prop making skills.
In my next post I shall cover how I designed the front panel, it was a pretty simple job, time consuming, but a project that could be undertaken by anyone.