Instructables

Aurora 9 bar - The Essence of Aurora

Featured
Picture of Aurora 9 bar - The Essence of Aurora
Since the introduction of Aurora 9x18, I received many requests for the kits and PCBs. I'm still quite undecided about making those available for a few reasons. However I really want other LED lovers (ok that might sound too much :) to be able to build one themselves.

So I came up with Aurora 9 bar. It's a bare essential version of Aurora 9x18. In fact the circuit is almost exactly the same (with a lot less number of LEDs of course). Even the firmware is essentially the same. So it has the same super smooth color fades as Aurora 9x18.

 
Remove these adsRemove these ads by Signing Up

Step 1: Concept & Circuit


Aurora 9 bar's circuit operates in the same exact way Aurora 9x18's does. Same PWM theme, same refresh rate, etc. Please refer to my Aurora 9x18 Instructable for the details.

Aurora 9 bar took one LED out from each of Aurora 9x18's 9 circles. Only difference in the circuit is that it uses BJTs instead of MOSFETs for the high-side switch (to save cost). Because there are only 9 LEDs total, the current requirement for the bus controllers is much lower.

Everything else is the same. So if you somehow manage to hook up more LEDs to Aurora 9 bar, it will look like Aurora 9x18.

Step 2: PCB


Aurora 9 bar uses surface-mount technology (SMT). If you've never built anything with SMT, this might be a good opportunity to try out. You will most likely realize that there's nothing to fear about SMT.

The high-quality, custom made PCBs, as well as kits are available at reasonable prices. Please view the details at "Kits" section of the forums.

Zwurmi1 year ago
I found some LEDs with common anode, so I modified the schematic:

left: orginal rigth: modefied
http://www.instructables.com/files/deriv/FQI/JI16/HI3U2BCK/FQIJI16HI3U2BCK.SQUARE.jpg

Do you think it works?
Btw I can't write programms for PICs and can't read assembler.

Thanks Zwurmi
SchnapsbarSchaltplan.jpg
ThatCatMan1 year ago
When I say sell this, I really mean all ready pieced together. I could probably never be able to solder so many tiny things. Nor could I even keep up with the tiny parts in the first place...
ThatCatMan1 year ago
You should totally sell this online like on Sparkfun or something. There is no way I could do this all any time soon, but it is so amazing, I would love to have this! :D
Could you place the source code for this project so I could mod it for use with the PIC16C55?
ledartist (author)  blinkyblinky2 years ago
(removed by author or community request)
Did you remove the zip file? I recently learned a new programming language and want to try this project out with it. I downloaded it before but I have upgraded to a new OS and so, lost the file.

P.S. What is the music used in the video?
ledartist (author)  blinkyblinky1 year ago
I don't know what happened, but I uploaded the file.

The music on the video is one of the tracks that came with the video editing suite (Final Cut Studio). The name of the track is "Reverse Chill".


Could you upload it on your website or something like a Google Docs drive? Thanks.  
ledartist (author)  blinkyblinky1 year ago
It's already uploaded - under step 8.
Thanks a million.
Thanks so much. Will try.
ptkhoi2 years ago
what PIC can i use instead of PIC24F08KA101 ?

I can't find PIC24F08KA101 in my city :(

Thanks
Khoi
MiladSafa2 years ago
Hey, guys, I have assembled the kit, but when i try to programme it is gives and error saying Device Id mismatch it says 000000 something and it should be 0000142 or similar, any help would be tremendously appreciated

i used pickit 3.
ledartist (author)  MiladSafa2 years ago
Check to make sure that you are using high voltage programming mode. See the second picture (screen shot) in Step 8.
Also make sure that you have connected 5V power supply to Aurora.

Aki
roketlights2 years ago
hey it doesnt specify which way the led should go
ledartist (author)  roketlights2 years ago

Take a look at the diagram, "Aurora9bar_PartsPlacement". LEDs have a flat side when you look from the top. Match that with the diagram.

Aki
roketlights2 years ago
im trying to figure out how to program..
i bought 2 of theese kits can you helpme program it? i have no idea how?
ledartist (author)  roketlights2 years ago
You need PICKit or ICD, or a clone programmer.
Once you have that, it's very straightforward.

Aki
thanks! looking forward to your lights! please send asap :DDD
-chase-3 years ago
Hi -

Love the size of this - width wize.

I've been looking for something to create a Spoke with but most are too wide for what i want to do.

Such as this one or this one...

JSo I'm curious if your design could:

a) be made longer to go from center of a wheel hub to the outer perimiter b) be made programable to show not only images when used as a spoke POV as the others linked to above, but also with the added plus of being able to display video as a POV

- with out much more width being added to the circuit board?

I'm sure this can be made to be a spoke POV but the width and what it would take to mod the circuit is the real question i'm curious about and what your thoughts are on how to go about doing so.

thanx
chase
ledartist (author)  -chase-3 years ago
I have given a thought of adding a little circuit to make this into a POV display. In fact, I'm about to test it.

a) If by longer do you mean more LEDs? The same design/software can be scaled to control more LEDs. I've tested with 18 LEDs. Of course you need a microcontroller with more I/O pins.

b) Never thought of showing video! May be my next challenge... Can be done without adding anything to the board, I think.

Aki
Yeah video... ;0)

With your system - i bet it would be supior to anyother if done right.

The bike i want to put one on and i;ve looked at many - as they say patience is a vertue - then i saw yours - i really like yours. and want to make it but...

I want it to fit the wheel - let me see if i have a pic of the bike on instructables
one second...

yup got one - you can see the wheels in this one.
They are 26" wheels but as you can see they are tri spoked.
putting 3 would lower the spin rate needed to see a picture and i believe video.

Putting them on boths sides - would look just ooh so cool.
especially when i paint them or the bike in total in semigloss black.

it's just the thought i'm having - and i want the leds to go from center rim to outer rim.

Since you made one with 18 leds - how long did the board come too?
I'll messure my wheel spokes tomorrow or the next day and let you know how long they are.

And thanx for answering and posting this instructable.
I've waited a good while to find one that really suits my bike and what i wanted. looks like i may have found it with yours.

chase
Supplied Base.jpg
ledartist (author)  -chase-3 years ago

Is that your bike? That's nothing like what I call bikes around here in Brooklyn ;)

Let me know the length of the spokes...

Aki
Yup that's my bike - i moded it a little by adding the scooter trunk.

I bought it second hand from a very nice canadian - you can't buy them in the USA - never could - but he brought two of them down while vacationing here. I got one of them and i think he took the other one back with him.

It's China designed and built - real tuff to get parts and real heavy but...
I like it - it goes farthur than the ones you can buy here in the states so fair, 90 miles on pedal assist.

I'll be heading over to where i keep it later - and take the measurements.

I wish i could just drill the spokes and have the leds come from the inside of the spoke - i looked - can't be done with out major work that would probably destroy the wheel.

But your leds - unlike the others i linked to - would look real sweet since they are narrow - i can make them look good aesthetically i think and hide them pretty much.

I've already thought of a water proofing idea and possible casing to put them in which i could just put two screws to hold them to the spoke or even velcro them with industral velcro in needed.

I'll get back to you asap.
thanx again ledartist.
-chase- -chase-3 years ago
Hey ledartist - i have the info you require.

7' for the rear and 8' for the front... however the front with that 8' on the inner i'd say 1/2 to 3/4 of an inch has only about 3/8inch of clearance due to the disk brakes.
but looking at your kit design - i do believe the end that doesn't have an led on it - where the power hooks up - will slide in there nicely. but i'm not sure - obviously i don't have it in hand to check.

Thepokes are not as long as i thought they would be on this bike, considering my 28' regular bike is probably around a foot or so. and a regular 26' is probably a good 11 inches or so.

anyhow have you given much thought to how to desplay pics and the right chips etc or even video?

I bleieve one of the kits that the person used in the POV link i posted above - they have one that does video... maybe you can get some ideas from that.

My thought is though since yours fads from one color to the other it should look one heck of a lot sweeter... well at least the way i'm envisioning it working.

let me know what you think and how to go about it. or if you deside to make it - hopefully you'll post an instructable on it.

thanx
chase
ledartist (author)  -chase-3 years ago

I guess a bit longer bar would be ideal?
I haven't made a progress on the POV idea yet. I have to wait for a hall sensor to arrive.
It's should be a minimal addition to Aurora 9 bar - hall sensor to detect the position, and software tweak.

Have you thought about how to power the circuit on the bike? Battery neat the LEDs on the wheel?

Aki
I've thought of it several times and of a few ways to power it.

The bike itself is 36 volt - pulling off that would be pretty simple and then just step it down.

What i would like to do and would probably be best - thoguh it would be more involved is to use this switch i saw once - don't know the name of it - which is a hurtle to go over.

It has a small tube with a spring loaded ball bearing inside - the bearing rolls against t contact strip - they use them just for such purposes.

I could put the contact strip whic is very small - maybe an 1/4 wide - looks like a gasaket almost - insulated on the back side - copper on the front is the way i've seen them before.
 and put the bearing side on the forks or wheel support. - then it would be easy to tun leads to any power supply - i might even add a power supply in the rear trunk at 12volt - i want to put leds in the reflector areas and have already bought them for the two main tail lights i guess you call them.

But as mentioned - i don't remember the name of what those type contacts are callled - i've searched the web but haven't found them yet.

that's my thought anyway -the other way is to tie a 9 volt battery to the wheel - or what ever voltage battery pak it can run on to the wheel.

I know other builders have done it that way - but not the way i want to do it as mentioned. ;0)

can't wait till you get the hall sensor in - i'm anxious to see what you develop.

Btw - i was reading one of your other instructables - you actually make these kits don't you? This is not something your going out and buying - your making the circuit board and all - if i'm reading it right.

Thats so cool - origianally i thought you were saying there were other kits available and custom kits available from some manufacturer or supplier you delt with.
all i can say is Wow! That's great - great work - looks absolutly great too!
Very professional looking piece of circuitry and board.

I'm totally impressed
ledartist (author)  -chase-2 years ago

Sorry I didn't mean to ignore your last comment... Just got busy.
I will tackle POV soon, but can promise as to when. You will see it here on Instructables for sure though.

Aki
kgroce13 years ago
Now this might sound like and odd question but what do they look like when spun? I have a project idea that has been using fixed color LEDs in a bar and this would be awesome if the colors stay mixed.
ledartist (author)  kgroce13 years ago

You'll see dots when you spin Aurora 9 bar. This is due to the PWM - LEDs are blinking at a fast rate.
As far as I can tell those dots keep the same colors, though.

Aki
crony_mk3 years ago
excellent!! muy bueno amigo!! :)
thirst4know3 years ago
I really like that!