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1  Using Arduino / LEDs and Multiplexing / Re: Help to build a LED PAD for films makers ; I will make a video tutorial ! on: May 14, 2012, 09:34:26 am
Do you need an arduino for this? Surely the panels are just LEDs and Pots or, variable resistors?
2  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 21, 2012, 04:37:22 am
You can tell by the markings on the strip, they'll either say 12v, R, G, B.
Or R, G, B, GND
You can get the whole thing to breathe, flash etc easily enough, you'd only need one transistor per colour for the whole thing
3  Using Arduino / LEDs and Multiplexing / Re: 50 meter long LED strip on: March 18, 2012, 05:15:40 am
The norm is 3 LEDs every 5cm, so you could do 18 at a time, 6 sections at 30cm, pulling approx 120ma if normal single colour LEDs.
166 outputs for one strip! 12v 20A per strip too.
None of the cheaper strips would work unless you ran them in a waterproof enclosure.
4  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 18, 2012, 04:59:42 am
Still not sure if it's common anode or cathode, what connect points do you have?
If you cut every 16" you'll be able to control 3 16" segments, can't see you getting a knight-rider out of that mate.
I'd cut and solder at least every 2", giving you 24 controllable sections, every 4" if you just wanted 2.
5  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 17, 2012, 05:02:57 am
Ah, you didn't mention it was one of those types of strip.
I'm assuming that you can change the colour of the whole strip with the remote, not the individual segments?
The knight-rider strips on youtube are designed that way, with smaller sections sharing a common ground or vcc.
Depending on if the strip is controlled as a whole or by segment you need to figure out if they're common anode or cathode.
So one live and a ground for each colour, or 3 lives and one ground. This changes the methods best used.
If you post up which LED strip it is we can take a look.
Have you searched on here for RGB LED strip? I'm sure there will be loads of topics on this already mate
6  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 16, 2012, 05:58:13 am
How would it knight-rider if you're not having individual connections?
Your options are:-
A) Control the entire triangle, all on, all off etc.
B) Control each side of the triangle
C) Control each section of the LED Strip
This can easily be replicated for both triangles by just connecting the VCC or GNDs together, depending on which method you use.

IMO, and after much research, the TLC option is much easier for the kind of setup in C) , though a little more expensive (unless you get free samples). 2 TLCs give you 32 outputs, you only need 24. As they provide PWM it's much easier to get a knight-rider effect, there are even examples built into the library to do it.
Set the resistor to 40ma, provide 12v to the strips and hook the grounds into the TLCs.
Note: You will need to separate the grounds of the LED strips and solder on some wires to connect to the TLC.
You could also use a universal remote, the IR library is very good. I managed to get 4 relays controlled for a universal remote set to Sony codes, so can't see why you couldn't cycle through some preset animations.
http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
7  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 15, 2012, 07:12:18 am
So you just want the triangles to flash? Not knight-rider etc?
8  Using Arduino / LEDs and Multiplexing / Re: Question about L.E.D strip lights and the Arduino? on: March 14, 2012, 06:38:09 am
Hi
It's possible, just depends on the amount of control you want. Most LED strips that I've seen split into 5cm, 3 LED strips as you've said. Each 5cm/3LED strip can be powered individually, but each LED can't unless you hack the strip apart.
Are you planning on using 16 strips of 3-LEDs for each side?
Do you want to control the whole triangle, a side or each 5cm strip?
I'm using 2 TLC5940s to control 32 x 30cm LED strips, each 5cm strip is 20ma, so 120ma for mine, per channel. The TLC can do this just fine.
If you want exactly the same on both triangles (if using 16 x 5cm Strips controlled individually) I'd use 3 TLC5940 running 2 strips per channel, the same one from each triangle.
9  Using Arduino / LEDs and Multiplexing / Re: 2 TLC5940 problem, possible overload? on: March 05, 2012, 05:07:30 am
I've got a working 8x4 setup with 2 TLCs. If you want to post your latest code I can test it out for you if you like mate.
10  Using Arduino / LEDs and Multiplexing / Re: 2 TLC5940 problem, possible overload? on: March 02, 2012, 12:07:43 pm
The whole circuit runs on a 3.7v LiPo.  All wired in parallel.  I just don't understand why its freakin out
Exactly, in parallel. Yours in running in serial, pulling down the 5v that goes into, then out of the Arduino and into the TLCs and the LEDs. Try putting another 5v, or 3v or whatever they can take, to the LEDs, linking the grounds together
11  Using Arduino / LEDs and Multiplexing / Re: 2 TLC5940 problem, possible overload? on: March 02, 2012, 10:37:07 am
Whereas I know for a fact that the basic use code works perfectly. If you can't get that working then you're never gonna get some custom code working.
A Lipo would also be fine, as you'd be giving the LEDs their own voltage, not pulling the 5v from the Arduino pin.
12  Community / Gigs and Collaborations / Re: GPS 7 Segment speedometer on: March 02, 2012, 06:18:07 am
You have velocity in Knots, you just need to convert to MPH (*1.15077).
I can't help you with the complete code though, what's the point of the project if not to learn about the platform and technology you're using? Couldn't you just buy a GPS-based speedo if you wanted a finished product?
Tutorial for the GPS module http://arduino.cc/playground/Tutorials/GPS
Tutorial for the Display http://tronixstuff.wordpress.com/2011/07/21/tutorial-arduino-and-the-nxp-saa1064-4-digit-led-display-driver/
13  Using Arduino / LEDs and Multiplexing / Re: 2 TLC5940 problem, possible overload? on: March 02, 2012, 05:40:43 am
Try replacing tlc.clear() with tlc.setAll(4000). This will set all the channels to 4000. I, personally, think your Arduino is struggling to supply all of the voltage to the TLCs and LEDs. I'd give them their own 5v supply and stick on some decoupling caps.
Are you just wanting to light one LED at a time, random LED and random brightness? I have a function that does that but doesn't use fades.
14  Topics / Product Design / Re: How to design a PCB that allows firmware updates. on: March 02, 2012, 05:32:21 am
Couldn't you just run a tiny sketch on the Arduino with a #include and a function in a .h file on the SD card?
When you say firmware, do you mean a sketch?
15  Topics / Product Design / Re: How to design a PCB that allows firmware updates. on: February 29, 2012, 11:53:22 am
Option 1 maybe?
http://baldwisdom.com/bootdrive/
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