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16  Using Arduino / Project Guidance / Re: Which Arduino to buy to use with HD video on: November 28, 2012, 04:06:12 pm
I agree that if the requirement requires overlay onto an HD signal, then an Arduino isn't going to cut it.  I designed the Video Experimenter shield for Arduino, but this only works for a composite video signal.  It uses an LM1881 sync separator chip to detect the timing of the video signal, then in Arduino code you can overlay low-res monochrome pixels onto the video.  It works well for many applications, but is decidedly low-tech!

17  Community / Products and Services / Arduino-based backpack board for Adafruit RGB Matrix Panel on: October 18, 2012, 07:19:16 am
I built this as a project a while back, but with Adafruit's encouragement, I brought it to market as a product.  Adafruit will be selling them, too.

If you have a large RGB LED panel, you know how the wiring can become a real rat's nest.  This tiny board snaps onto the back of the Adafruit 16x32 RGB panel to eliminate the mess.  The ATmega328 comes preloaded with a nice animation, and it's easy to control the panel with Adafruit's library.


If you have the Adafruit panel, this is a must-have!  Easy-to assemble kit, and also available pre-assembled.  All the product info is here:
18  Community / Exhibition / Gallery / Re: XBee Wireless Robotics Platform on: April 30, 2012, 09:04:52 am
You only need one serial port for the project.  I used Serial for debugging and Serial1 for the XBee.  Just eliminate all the calls to Serial, then change Serial1 to Serial. 
19  Using Arduino / Displays / Re: How to capture Analogue video using Video experimenter on Arduino Duemilanove on: March 12, 2012, 10:22:47 am
azad200517, I'm the designer of the Video Experimenter shield.  There is only enough SRAM in the Arduino to capture one frame of low-res monochrome, so you can't capture video, but you can capture individual video frames as demonstrated in this project:

You can write the frame buffer to a computer over serial, but that is going to be very slow.
20  Community / Exhibition / Gallery / XBee Wireless Robotics Platform on: February 23, 2012, 11:50:30 am
I built this XBee controlled robotics platform using a 4WD chassis.  There is no microcontroller on the remote, just an XBee connected directly to a joystick and two buttons for controlling the lights.  All project details and video at:

21  Community / Exhibition / Gallery / Displaying Android phone video on RGB Matrix on: January 22, 2012, 09:39:08 am
Using the OpenCV library for Android, an IOIO board, and an Arduino I was able to display camera frames from the phone on the Adafruit 32x16 RGB matrix panel display.  The frame rate is slow (the IOIO is the bottleneck), but it looks pretty good.  All project details here:

22  Using Arduino / Project Guidance / Re: Arduino Game Console >? on: December 11, 2011, 11:50:15 am
Yeah, guys, the Hackvision is completely open source, just like all my products.  Not sure why anyone would think otherwise.  Just look at the product page:
23  Using Arduino / Displays / Re: 4 digit 7-segment counter with only 1 shift register on: December 02, 2011, 04:45:15 pm
Actually, you should not source or sink more than 6mA per pin on a 74HC595 and not more than 70mA for the whole chip.  It's not intended to drive LEDs.  If you have all 7 segments on at 20mA, that's 140mA. 

I designed the Digit Shield to use a single 595 and a 74LS247 BCD to 7-segment driver to multiplex four 7-segment displays.  Four of the 595 outputs control PNP transistors sourcing current to the common anode displays.  The other 4 outputs drive the 4 inputs of the 74LS247 to set the value of the current digit.  This approach only requires 3 Arduino pins, plus one more to control the decimal points.  The shield uses pins 2,3,4,5.

More info:

24  Community / Products and Services / Re: New Product: Defusable Clock Kit on: October 26, 2011, 08:44:07 pm
Yeah, I thought long and hard about all of that, consulted a lot of people, my lawyer, etc.

Read this blog post about my anxious adventures:

This is why I'm only shipping a bag of parts and nothing else....

25  Community / Products and Services / New Product: Defusable Clock Kit on: October 26, 2011, 04:29:07 pm
You may have seen this when I made this as a project, but now it's a product.  The Defusable Clock kit lets you build your own dangerous looking device.  Only the electronics are in the kit, not the scary-scary looking parts. 

This is based on Arduino technology (powered by an ATmega328 with Arduino bootloader so you can hack it!).  Kit is $32.95 in the nootropic design store.

Also see the full product description here.
26  Using Arduino / Displays / Re: TVout: NTSC and PAL Composite Video Output. on: August 06, 2011, 12:50:59 pm
The vertical sync is not quite standard.  So some devices will not work.  I have not found a device that doesn't work, but your USB device may be too picky about the standard.

27  Community / Exhibition / Gallery / Re: LED Music Visualizer on: July 27, 2011, 10:05:50 am
This looks really nice.  I'm really interested in the beat detection code, but I can't find it anywhere on your site.  Are you going to let us see the code?
28  Development / Other Hardware Development / Re: Suggestions about Mega-equivalent with built-in Ethernet on: July 27, 2011, 09:07:28 am
Nice routing, Jon!  I'm sure that was a ton of work.

I might be totally wrong about this, but I have seen PCBs with a vRestrict area under crystals because a via under a crystal will be in contact with the crystal's metal case.  There is a via under one of your crystals (connected to GND I believe?).  Just thought I'd mention it in case it was not intentional.
29  Community / Exhibition / Gallery / Re: Visualizing TV Dialog Using Closed Caption Data on: July 20, 2011, 02:45:22 pm
Yes, it was!  Nicely done.
30  Community / Exhibition / Gallery / Visualizing TV Dialog Using Closed Caption Data on: July 19, 2011, 08:13:53 am
I used Arduino + Video Experimenter shield + Processing sketch to dynamically construct a "word cloud" from the closed caption stream embedded in a TV broadcast (NTSC).  The Arduino decodes the closed captions and writes the words over a serial link to the Processing sketch running on a computer. 
Project details :

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