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1  Using Arduino / LEDs and Multiplexing / Re: LPD8806 RGB LED Strip - Reverse Engineer (with pics) questions/feedback on: March 20, 2014, 10:53:15 pm
how do you actually get a price / buy something from ? I can't seem to figure it out :/

Email them at
2  Using Arduino / LEDs and Multiplexing / Re: LPD8806 RGB LED Strip - Reverse Engineer (with pics) questions/feedback on: June 19, 2013, 09:02:55 am
dreging up an old topic i know, but you never revealed where your got the raw 8806's from, I need a large amount for something that isn't really compatible with buying the strip lights

I have over 100 of the LPD8806's on hand.  PM me if you are interested.
3  Community / Exhibition / Gallery / Re: LPD8806 LED strip project on: December 06, 2012, 07:41:15 pm
Cool project! I am looking to start my first arduino project with lpd8806 lights. Hopefully I can learn it as fast as you did  smiley-grin

I have spoken to a few (15) china suppliers. Looks like the going rate is about $40 for 5m and then $40-50 shipping via DHL.

Well, $98.89 was the total after shipping and paypal fees for 3 - 5m 5050 PD8806 Strips, 300/5m, ip68, Tape Backing.

What supplier did you get this price from?
4  Community / Exhibition / Gallery / Self balancing skateboard on: December 05, 2012, 05:36:32 pm
I've started a new project that is based on an excellent instructable by XenonJohn.

I spent a weekend putting together a prototype on a piece of 3/4" plywood and tweaking the code to work with the Accelerometer/Gyro that I was using.  The code was the most difficult part.

Major parts I am using are:
* 2 - 250W motors (from a Razor E300)
* 2 - 6" wheels (from a Razor E300)
* Sabertooth dual 25A motor driver
* Arduino (this does all of the processing of the signals from the Accelerometers and Gyros and determines the signal to send to the motor controller.)
* MinIMU-9 v2 Gyro, Accelerometer, and compass
* 2 - 7aH Sealed lead acid batteries

I even took this board out in front of my house and was able to ride around on it.  But I don't have turning hooked up yet.

This video shows that it is balancing well on it's own.  The wire I'm holding is for the dead man switch to cut power to the motors if something bad happens.

Next will be adding a skateboard deck, turning, LED lights, buzzer, proximity detection, etc. 

More to come on this.......
5  Using Arduino / LEDs and Multiplexing / Re: My RGB LED Stairs Illumination video on: November 30, 2012, 04:17:08 pm
I'm thinking about doing the same thing and was glad to run across this article. I'm new to all of this and was wondering if you had a schematic that you worked from or did you go from the  TLC5940 data sheet. Also Sparkfun has a TLC5940 breakout board that I was thinking about using in conjunction with the common anode LEDs you used, do you have any thoughts on using it?

I created my own schematic using both the ATMega328 datasheet and the TLC5940 datasheet.  

I tested the design and operation on a breadboard before creating the circuit boards.

Since trying to create a one layer circuit board to hold all of the IC's and connectors was not really possible without a lot of jumpers, I decided to go with 4 circuit boards with the same type connectors that the arduino uses.

The sparkfun breakout board would be good to use if you want to become familiar with them or don't have a way of etching your own circuit boards.  Just remember that you'll have to buy a bunch of these to control a whole staircase full of RGB lights.  I've actually been thinking of designing a kit to allow DIYers to purchase that will be enough to control 15 stairs with RGB LEDs and will have an arduino integrated.  But this is still a ways off.
6  Using Arduino / LEDs and Multiplexing / Re: My RGB LED Stairs Illumination video on: November 29, 2012, 12:06:00 pm
Where did you place the sensor? At the top of the stairs or at the bottom or did you get a bunch?

There is a sensor at both the top and bottom of the staircase.  They positioned so the sensor will detect someone about to go on the staircase and trigger the appropriate animation.
7  Using Arduino / LEDs and Multiplexing / Re: My RGB LED Stairs Illumination video on: November 28, 2012, 10:20:21 am
This past weekend I finally got around to changing our the pressure sensors to using a Infrared Proximity Sensor Long Range - Sharp GP2Y0A02YK0F I got off Sparkfun a few months ago.

The range of the sensor is up to 60" which is more than enough to detect someone going onto the staircase.

I added some buffering in the code that does the detection to limit any noise that may occur.  It also allows me to filter for smaller objects going by quickly from triggering the stairs (my dog). 

It is working great and I'm much happier with this setup over using the pressure pads.  A person no longer has to be sure to step in the middle to trigger the lights anymore.

I also added a new animation to the staircase.
8  Using Arduino / LEDs and Multiplexing / Re: My RGB LED Stairs Illumination video on: November 08, 2012, 10:58:19 pm
Nice!  Definitely a step up from what I did with the more powerful LED's. 

Is all the wiring beneath the stairs?  Are those 1W LEDs?  What is controlling the animations?
9  Using Arduino / LEDs and Multiplexing / Re: LPD8806 RGB LED Strip - Reverse Engineer (with pics) questions/feedback on: November 07, 2012, 09:26:47 pm
52pixel/m LPD8806 strip:
32pixel/m LPD8806 strip:

Or Contact Britney at

I'm about to order some of the 52pixel/m strips.  Not that I really need them.....just want to play with them.  LOL
10  Using Arduino / LEDs and Multiplexing / Re: 12v LPD8806 Strip? on: September 09, 2012, 10:26:04 pm
I saw the new 32 pixel/m strips and considered buying some but currently have no project for them. 

Post some pictures and/or video if you have a chance, please.
11  Using Arduino / LEDs and Multiplexing / Re: My RGB LED Stairs Illumination video on: June 09, 2012, 01:34:57 pm
The RGB LEDs used are diffused common anode type that I picked up off of eBay.  They have a rated luminous intensity of 8,000mcd at 20mA.

I have not done anything further with the stairs lately.  I have determined that the pressure sensor are not going to work in my setup long term in the way I have them.  I have the pressure sensor centered between 2 stainless plates with a dab of hot glue on either side to focus the pressure on the sensor.  Then I put a dab of hot glue at each corner to hold the plates together.  It works great for a while but then the hot glue starts breaking down with the continuous walking on it.  I've thought of changing from the hot glue to little rubber pads but have decided to use infrared distance sensors instead.

The sensors have a limited range of about 3 feet so going across the stair case will work great.  The pressure sensors use only 2 wires whereas the infrared sensors use 3 wires.  To install these, I have to either hack in these to my existing board or I have to re-create the top board.  For simplicity, I will likely just hack in the sensors to my existing board. 

In my design, there are 3 PCBs to control each of the colors for the LED and the top board has the ATMega IC and the positive connectors for all the LEDs.  If I had to redo this all over again, I would spend the extra money to have a single 2 sided board made to allow me to easily plug each LED into its own connector rather than having to plug each leg of the LED into its own board.  This would make it easier to create something that is marketable to others interested in doing the same thing and would have saved me hours of wiring this up in my closet under the stairs.  But once installed, it has worked flawlessly.

12  Community / Exhibition / Gallery / Re: LPD8806 LED strip project on: June 07, 2012, 03:16:53 pm
Awesome work!  I like all the different modes you did.

I'd like to see how you wired up the piezo transducers and calibrated them.  smiley
13  Using Arduino / LEDs and Multiplexing / Re: 5x5x5 LED cube - video on: March 13, 2012, 07:43:59 pm
I have the gerber files and can rebuild some of the circuit board designs I lost but this will take many hours of recovery.

btw....did I mention Norton backup sucks? smiley-wink
14  Using Arduino / LEDs and Multiplexing / Re: 5x5x5 LED cube - video on: March 13, 2012, 07:07:39 pm
If anyone downloaded my fritzing file for the 5x5x5 cube and still has it, can you send it to me please?

Norton backup sucks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!  Even though I was backing up the my documents folder, it skipped file types it didn't recognize.  Way to go Norton!!!!!!!!!!!!!  f'ing pissed.  Lost a lot of my projects.
15  Using Arduino / Project Guidance / Using two DC Motor Speed controllers for revsable control on: March 12, 2012, 09:41:59 pm
I plan on building a Segway type vehicle this summer and started purchasing parts.  I have the motors, batteries and just got in the speed controllers.  Problem is.....I ordered the wrong speed controller and realized it 30 minutes after ordering it!  Let this be a lesson....Don't purchase from eBay late at night when you've had a couple drinks! lol

So I received 2 - 30A speed controllers that are not reversable.  So now I'm trying to think of how I can use these for my project or another project that may only require a single motor.  Can I use each of these to power a different direction with a diode on the output to protect it from reverse voltage/current?  Any other suggestions would be helpful.

I plan on building at least a couple different vehicles....segway like, balancing skateboard and perhaps a lawnbot.  So now just looking for a way to utilize these and not have to try to resell them.

Here is the auction link for the 2 controllers I received.

Thanks for your input!
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