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1  Using Arduino / Project Guidance / Re: Sequence 70mA LED's on: September 24, 2013, 09:35:57 pm
bump anyone?
2  Using Arduino / Project Guidance / Re: Sequence 70mA LED's on: September 24, 2013, 01:57:48 pm
Would I be able to do a matrix setup with this?  I want to be able to do animations from right to left.  Trying to think of the easiest way that i can accomplish it without having a million parts.
3  Using Arduino / Project Guidance / Re: Sequence 70mA LED's on: September 24, 2013, 12:23:37 pm
You could do the PWM in software. The 'of which 14 provide PWM output' part means they provide hardware pwm which you just configure (by calling analogWrite()) and the pwm will then happen automatically, but there's nothing to stop you just turning the pins on and off at regular intervals in software. There's at least one library to take care of this for you, although writing your own code to do it wouldn't be hard.

Thanks Peter, that helps a lot!  I will try to see if I can get the basic circuit setup once I order the bc337 since I have none.  Then try to iron out the code.

What would you guys suggest for the same setup but closer to 70-80 in series parallel of 2-4? 

I would love to be able to have each LED addressable for both setups like a Matrix but I figure that would be extremely hard to do?  The first setup will have 144 Led's i know for sure, the other one not sure yet.
4  Using Arduino / Project Guidance / Re: Sequence 70mA LED's on: September 24, 2013, 11:51:02 am
The Arduino Mega 2560 has 54 digital I/O pins.

Digital I/O pins: 70 (of which 14 provide PWM output)  So this setup wont be running like my current PWM setup correct? 
5  Using Arduino / Project Guidance / Re: Sequence 70mA LED's on: September 24, 2013, 09:45:55 am
Rather than use a voltage regulator, it would be better to use constant current drivers, still with 2 to 4 LEDs in series. See attached schematic. If the combined voltage drop of the LEDs is less than about 7V, then add a resistor in series with the LEDs to bring the voltage drop up to 7V, to avoid overheating the transistor.

I appreciate the quick response.  What arduino would you recommend?  Or should I start looking at something like this? http://www.atmel.com/products/microcontrollers/avr/AVR_XMEGA.aspx

I prefer arduino but I need something with up 50 pins on this project maybe more for the rear set I am doing.
6  Using Arduino / Project Guidance / Sequence 70mA LED's on: September 24, 2013, 09:09:16 am
I am trying to find the easiest way to drive & sequence these red or amber LED's
http://www.mouser.com/Search/ProductDetail.aspx?R=CP41B-AHS-CM0Q0264virtualkey57280000virtualkey941-CP41BAHSCM0Q0264

This will be for a turn signal on my custom motorcycle.  It is only for show bike & is on a trailor everywhere it goes.
I currently made a design where I have no sequencing and do a series parallel arrangement with 4 LED's and a 22ohm resistor.

To do the animations I have in mind, I will probably use 2-4 in series with a voltage regulator set at 5/9/10V.  How can I drive these with an arduino?  Maybe a mega since i will have anywhere from 30-50 of theses.

Any help or suggestions is greatly appreciated.
7  Using Arduino / LEDs and Multiplexing / Re: Signaling led's to go low and high with ATtiny85 on: September 04, 2013, 06:04:29 pm
They are a custom setup but will be used on a victory vegas.  I forgot to mention each side (left and right will have their own board with this circuit on) so this only will signal one side.  I have modified other example codes but never written anything from scratch.  I will see if i can get anything to work on the 85 tonight.

I appreciate the help.
8  Using Arduino / LEDs and Multiplexing / Re: Signaling led's to go low and high with ATtiny85 on: September 04, 2013, 03:34:39 pm
Have you successfully programmed the ATtiny85 yet? If so, show us your sketch that ran.


Jack I have nothing unfortunately.  I just have the 2 ATtiny85's from mouser and the circuit setup.  I hadnt planned to do the coding myself but im stuck now.  I was going to program them with my arduino r3 plus.  I just am not sure where to start.
9  Using Arduino / LEDs and Multiplexing / Signaling led's to go low and high with ATtiny85 on: September 04, 2013, 02:30:03 pm
I have a 12v array of LED's I have that I want to always be on with a 20-30% brightness and then when a 3rd wire (12v also) triggers it would go close to 100% brightness.

I was working on this with a friend but his support has stopped.

I included the schematic we setup up, I just dont know where to start with the ATtiny85-20SU code.  I appreciate any guidance.

Mike
10  Using Arduino / LEDs and Multiplexing / Help with PWM led setup 7X2 on: December 28, 2012, 03:32:26 pm
I posed on here a while back about making a integrated turn signal/brake light and im finally able to start working on it again.  I changed a few things to hopefully make it brighter and easier.

I will be using these led's since they have a better beam angle and are much brighter that my previous ones.
http://lighthouseleds.com/5mm-piranha-led-red-ultra-bright-10-000-mcd.html

Can my arduino Uno r3 handle this or will i need shift registers and led drivers?  Would esentially make a 7x2 matrix?  What wiring would be best for this and help with fluid animations?

It will be basic operation for the most part.
       Motorcycle on (no brakes) = X% brightness
       Brake applied = 100% brightness
       L/R signals = 100% brightness fading from bottom to top similar to this video  http://youtu.be/5ubGnuJhvsY?t=37s

How would i use the arduino to read the left/r signals activated and then trigger the animation?

I tried looking for a while to find a similar code that i can use but didnt find much.  I would appreciate any help
11  Using Arduino / Displays / Re: Faster display on: November 20, 2012, 02:50:42 pm
The basic $9 (yes i know its a cheap-o) seven button screen I have when scrolling through numbers it blurs them horribly even with faster LCD library.   I just want something that will be able to be readable at arms length away without squinting really.  What TFT from 3.0"-5" is most widely used and also isnt super expensive?  The 4d systems seem to be overkill and overpriced for my project.  I just need a big screen without super high detail.
12  Using Arduino / Displays / Faster display on: November 19, 2012, 05:37:32 pm
Besides going with an OLED/color tft display is there any faster LCD's that can display characters with less shadowing?
13  Using Arduino / LEDs and Multiplexing / Re: PWM LED letter V tail light on: November 16, 2012, 11:20:14 am
Thanks DX
14  Community / Local Groups / Re: Chicago programmers, can you help please? URGENT on: November 16, 2012, 11:19:51 am
I second that, i also need a developer
15  Using Arduino / LEDs and Multiplexing / Re: PWM LED letter V tail light on: November 16, 2012, 09:40:26 am
Is there a more efficient way of of doing this?  it doesnt necessarily need to follow my schematic wiring  as long as it can do what i described in the first 2 posts.

I appreciate any help.  I am still very new and trying to learn.

Is there also a site where you can ash people to write the code for free or compensation?
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