Merry May

Last day of uni on the twenty-ninth, glad to have this semester (almost) done.

Work, work, work at the moment.

However, more interestingly, today is the last day of May, the last day of Autumn, and tomorrow the first day of Winter.

Fast run through of May, yeah?

Early May, Dad's birthday, lots of a very filling cake... Mmmm... Cake...

Moreover, Jesus Christ Superstar. Show was fantastic. So hot, it almost caught fire.

Middle of May, Tash's party, with a guest appearance from Jesus.

Also: JD's birthday; Pancake Parlour; Shopping in th

e city; Cancer (boo!); Crepes; Movie night.

Work every Wednesday (I have not been outside during daylight hours on a Wednesday this month).

In addition, I turned twenty. Fun things of note: Suit and associated items; items for my cuffs; subscription to a magazine I was planning to buy a subscription to next month; fan controller (see picture); enough money to fill my car up four times (or enough for two and a bit months); cards; hugs; and well wishes.

Plan for June: Work every Wednesday, and most Friday's. Study hard for exams, especially Math and Electrical Systems. Relax before another hectic semester. Visit friends all over Melbourne. Fiddle. Invent something. Increase my average sentence length...

Hope you've all had an awesome May 2009; now onto Winter!

Help!

Ideas?

My Blue Aura

Right, I've been thinking my car was looking a bit dull for a while now and really needed something to separate it from the rest of the cars on the roads. Santa obviously got my letter, and wrapped up some 12" Blue neon's for me. Cheers Santa!

Yup, righto, I hear you. Those people with under body neon's are the people who you want to ram off the road as they speed past you in their fully riced up lawnmower. I had no intention of putting them under my chassis though. To start with I'm too old to be lying on concrete, trying to find a way to secure plastic lights. So I opted to put them where only the best will see their glow – under the two front seats...

Before I even started I knew there would be three issues. First, you need power. Second, you need to be sure the power you've selected can light the neon's. Finally, the purpose of this is still to unsure driver and passenger safety, and lights inside the car while driving at night can be a distraction.

Thanks to a suggestion from Santa that I had already considered, the best place to mount them would be at the back of the front seats, so the spill is mainly behind the driver's vision, and not in front. And when I last cleaned the car (that makes a grand total of the number I've cleaned the inside of that car to one now) I found that the driver's seat belt sensor could be unplugged. And even better, it registered twelve volts on my "oh, not stolen" multimeter. This should be a piece of cake right?

Wrong. To start with, I connected the Molex connector with the wrong polarity. Words beginning with "f" spill from my mouth. I donno about you, but I assume when I see a red and a blue wire; the blue will be the ground of the two. And then, to my dismay, I realised the second of my possible problems had come true. Being only a seatbelt sensor, it hardly needed the three Watts (hee hee, I said "Watt") to see if I put my seatbelt on (which I always do, even when backing out of the drive... Habit...) and as such, only half lit the neon's.

Bitch whore...

So now I need to find twelve volts somewhere in my car. To the idiot who just said take it off the battery, I don't have any more than a meter of wire, and that's before I point out the safety issues...

Four hours later, I found a set of wires heading to the rear of the car. I hoped to take a little bit of power off the parking lights (so the neon's would come on when I turn the headlights on). It only took me fifteen minutes to find a set with power in it, and another fifteen to find a set with twelve volts...

Not quite sure what the set of wires I found does, but they are "always on," which leads me to believe they have something to do with the rear boot light (the switch for which is based in the boot, how simple). And considering my other set of lights hasn't blown up yet, this seemed a good a set as any to take power from.

Extend my wire to the centre console, attach a Molex connector, plug it in, and voila! Under seat neon's! Reassemble the car (I know I took mine apart doing this, but I found long lost coins totalling $10).

Now to tuck this all away neatly I removed the much useless ash tray to mount a switch built into a PCI backpane (can anyone guess by now where these neon's were designed for use?) and drilled a hole in the plastic of the console to mount it. Silly me made the hole a touch too big, so don't play with it if you are in the position to do so, or I'll make you fix it...

Driving at night is a breeze with these, and don't distract me at all. The hardest bit is remembering to turn them off, because they're not visible during the day and remain on even when the ignition is off.

Have some photos of the car, or better yet, come for a night time drive...

Power to the Project!

After a couple of months of bitching, someone finally granted me a spare few months of spare time. In my first week of this spare time, I've been both bored, and inventive.

Sitting next to me is my now finished ATX power supply. With it, I am able to hook up my future projects to whatever voltage I desire without the need for masses of batteries, something that will no doubt save me many dollars in the future. Total cost of my money saving project: $3 plus a few hours of my spare time.

Parts required:

• That shit ATX PSU from that old PC sitting around. Under 600W, else you might as well re-sell it.
  
• Brain; if you have one already, then you won't need to find someone with one.
  
• Tools; call your nearest one over.
  
• Your preferred method of connecting wires (in my case, a terminal block).
  
• Switch; SPST is the minimum; rated to anything. You'll almost always have one in your spare parts box.
  
• LED's; any colour. Yes, don't lie; you do have some just sitting around.
  
• Two resistors; people recommend 330Ω, I used 470Ω. Reality: any that will make your LED's turn on with 5V will do.
  
• Heatshrink; compulsory. Yes, I know you wasted it on your last project because it's fun to use, this time you actually need it.
  
• Some form of non-conductive glue. Hot glue is perfect, I used bathroom sealant. Make your own choice here.

How to:

• After snipping off the assorted connectors take out your multimeter and measure the voltages from all the wires. Black is always ground, and if you don't know that, find someone to do the rest for you. After discovering that none of the wires seem to have any voltage, connect the green wire up to a black one. Try again. Oh... The green wire seems to be some sort of switch... Take note of that, as well as the voltages from all the wires. Also take note that same coloured wires are the same. Fancy that.
  
• Measure the internal resistance between 5V and ground. It's a switched mode power supply, and needs some sort of load to work. Mine was 100Ω. If it doesn't have a load, it might need a power resistor later on. If it works without, give yourself a pat on the back. Else you might need to look into a load later in the project.
  
• Leave it sit around for a couple of hours, disconnected from the mains. Anything with mains power these days is dangerous because of the quantity of components that hold power long after it is off. I've heard people recommend leaving it around for days. Your discretion here. If you feel like poking your hand around a capacitor with a couple thousand volts charged, be my guest; I take no blame for your stupidity; I did add "brain" to the parts required list.
  

• Open it up, once you've read the above note. Serious. I like you alive.
  
• Find some method for connecting a switch between the green wire and a ground one, use heatshrink to cover your shitty solder work and more importantly to prevent bare wire touching the case. Attach the switch to the outside of the PSU in your preferred fashion. I used the assorted nuts and washers that come with the switch, works a charm.
  

• Track down the purple, grey and two black wires and separate. Be inventive to connect up the LED's and the resistors here (series for those that are "brilliant" enough to ask). Again, heatshrink is compulsory. The purple will be your "Mains On" light; the grey your "Power Good" light. Mount. I used bathroom sealant.
  
• Close up that PSU. You should be done on the inside now. Test that plugging into active power lights the "Mains On" light and flicking that switch lights the "Power Good" light. Not working? See if I care, it worked for me...
  

• Separate the wires you want for your future projects. Can't remember what was what? I told you to write it down. Blue = -12V; White = -5V; Orange = 3.3V; Red = 5V; Yellow = 12V for most systems. Got a small brown wire? I'm informed it needs to be connected up to either 5V or 12V to work. Someone get back to me on this if that was your case. I had no such wire. Snip off the wires you don't want.
  
• Attach to your preferred method of connecting wires and neaten up remaining wires. I chose a terminal block because I can hook up anything with a screwdriver. I've seen people use banana plugs and mount them on the case of the PSU. It's already cramped in there in my opinion; the top of the PSU has plenty of room. If you do decide to protrude something from the case see my note before opening it up, and use heatshrink (it's like a condom for wires; protects you from shorts running around all over the place).
  

• Finalise... It took twenty four hours for my terminal to set in place on top of the case due to using bathroom sealant. It has a nice smell though now. Test. The case is part of the circuit, and you'll blow stuff letting wires touch it. Like the RCD in your house. It's there for your safety...
  
  

I'm now looking for more stuff to build/invent. If you have an idea of something I can build, pass it on. I have spare time and a desire to get electrocuted at least once these holidays.