Step 3: Assembly

In Aurora 9x18 instructables, I've shown the "hot plate reflow" method. I've since found hand soldering of SMD to be quicker for the assembly of Aurora. I think without a stencil to apply solder paste, the time it takes to apply solder paste is much longer than just soldering the parts with a soldering pencil.

Of course you can choose whatever method that works for you.

*** You need a PIC programmer such as PICKit 3, ICD2, ICD3 to program PIC24FV16KA304. PICKit 2 does not support this newer PIC. ***

If you decide to assemble Aurora 18x18, take time and make sure to double check each step be done correctly. As some parts are impossible to get to once you populate LEDs on the PCB, so it's important to double check all SMD parts are soldered correctly and securely before proceeding to solder LEDs.

Power supply requirement is regulated 5V DC, 1A capacity minimum. 500mA supply might work, but I like to have some safety margin, so 1A or more is recommended. USB power supplies and computer USB outlets generally work well also.

The step-by-step assembly guide and the latest firmware is available at my website: http://www.theledart.com/blog/aurora-18x18-assembly-guide
<p>Awesome work! Looking forward to make one :) It just looks perfect.</p>
hahahaha &quot;bigger is indeed better&quot; ... so true dude! great work i think i am going to build something similar after finishing my exams ^^
hi can you provide me detail for some discussion <br> <br>email: subrotradeindia@gmail.com
Although I don't own either and thus can't be certain, the PIC runs as 32 MHZ, so 8MIPS to be the same thing as the 1M 5050 RGB LED strips available on LD-----http://www.linkdelight.com/EL07-5M-300-LED-Red-Green-Blue-Flexible-Light-Strip-Remote-3528-SMD.html
Hey Ledartist, great upgrade! <br> <br>I don't understand something about the PWM concept. <br> <br>You say the PIC runs as 32 MHZ, so 8MIPS. <br>You write that the width of the chart in your 9x18 instrutable is 8.1 ms. <br>8000000 / 1000 * 8.1 = 65536 <br>SO the width of the chart is 65536 instructions. <br> <br>There are 256 PWM steps and each step is split into three substeps. <br>65536 / 256 / 3 = 85 <br>If the maximum width of each substep is 85 you cant increase the length of each pulse 256 times, but in the graph in the 9x18 instructable, this is what happens. <br> <br>What am I missing? <br>
PIC24F is 16 bit microcontroller, running at 32MHz gives 16MIPS. (the architecture is different from 8 bit ones) &nbsp;Shortest pulse this PIC can produce is 62.5ns.<br> <br>Not sure if I understand what you are saying, but my implementation on Aurora only has 128 levels of brightness levels.<br> <br>R/G/B channels each go through 127 varying width of pulses to form equivalent of one phase of PWM output. The basic idea is to control the PWM output in exponential curve, instead of linear typical of usual PWM. And to control multiple LEDs, hardware produced pulses are multiplied with the software controlled output pins to keep the timing precise, and reduce the processing time.<br> <br>My implementation also has a benefit of reducing visible flicker, by breaking up each PWM cycle into subcycles - similar to spread spectrum technique used by specialized LED controller chips.
hey ledartist, great work!<br>can you send me/ or post a complete list of parts for the Aurora 18x18 like the 918-Bom.csv for the dikikeys site.<br>please, i don&acute;t find the corecct parts.<br><br>best regards and thank for the help
Parts come from a few different places now. Let me know which one you are having problems locating.<br> <br>
Thanks, i&acute;ve already the parts. are these the correct ones<a href="http://flic.kr/p/bN2bgz" rel="nofollow"> http://flic.kr/p/bN2bgz</a>
Oh no I've forgotten the transistors and the wrong PIC MMBT2222A ordered.
looks good to me...
Beautiful art! <br><br>Do you have any plans to make a larger version of either the 9x18 or 18x18 i.e. the same number of LEDs but spaced further apart?
Possibly, in the near future...<br> <br>
This is just amazing! So much went into it! Definitely going on my project list!
Great job, thanks for sharing.
Amazing and beautiful, this is going on my future project list!<br>
Aki San,<br>18X18 looks great.<br>What is the price of fullly assembled unit?
Hello Sree,<br> <br> How are you?<br> <br> I have not decided if I sell assembled units. It takes hours to assemble those, so I can't make that many...<br> <br> Thanks,<br> Aki
Another stunning piece of work. I especially love the colour organ mode!
Thanks Jeff!<br> <br> Yeah color organ mode looks a lot better than I imagined. The idea was around for a while, then I finally did it, and I'm glad that I did.<br> <br> Aki
Think I could buy a PCB prepunched from you?
I will make the PCB available for purchase very soon. Check back my website http://theledart.com for info.<br><br>Thanks,<br>Aki
A thing of beauty. Thanks for sharing<br>Thomas
Thanks for looking!<br>
Looks great!

About This Instructable


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Bio: I am an electronic artist living in Brooklyn, NY. I work with LEDs and microcontrollers to create beautiful objects.
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