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136  Forum 2005-2010 (read only) / Exhibition / Re: Arduino Pong on: July 29, 2010, 08:28:52 am
Thank you, robinh and danke, ChrisS.  It sounds like the 75 ohm resistor is required for at least some TVs.  I'm considering making a product that generates video and I'm trying to figure out if I should include the 75 ohm resistor (at least as an optional component) and the diodes.  I did experiments with diodes and they degraded picture some, and I was told that they were not strictly required.  I'm just trying to design a device that would work on the *most* TVs possible.
137  Forum 2005-2010 (read only) / Exhibition / Re: Arduino Pong on: July 28, 2010, 02:35:33 pm
@robinh: what was the behavior before you added the 75ohm resistor?  I've been trying to figure out what circumstances lead to the need for the 75ohm resisotor.  How does one know they need it?  Which TVs would require it?  Thanks.
138  Forum 2005-2010 (read only) / Exhibition / Re: Hackvision now available on: November 12, 2010, 08:38:12 am
Just a note to UK readers that Hackvision is now available at Cool Components.  

http://www.coolcomponents.co.uk/catalog/product_info.php?products_id=606

They even put together a "super bundle" that includes all the extras to help you really start hacking!
http://www.coolcomponents.co.uk/catalog/product_info.php?products_id=607


More international distributors are coming very soon.
139  Forum 2005-2010 (read only) / Exhibition / Re: Hackvision now available on: October 22, 2010, 07:48:31 am
Yes, you can always do more with more hardware.  The ATmega644 gives you much more memory to work with so you can do higher resolution, but it costs twice as much.  And the AD725 chip and DAC on the Uzebox give it color capability, but they add cost.  I wanted to design a gaming system that was as simple as possible and had a low price.  I wanted to provide homebrew retro gaming for under $40 instead of $100.  I think it's fun to work within the tight constraints and try to get the most fun out of a simple ATmega328.
140  Forum 2005-2010 (read only) / Exhibition / Re: Hackvision now available on: October 20, 2010, 04:18:50 pm
Yes, a special thanks to Mowcius for helping test on PAL TVs in the UK!
141  Forum 2005-2010 (read only) / Exhibition / Hackvision now available on: October 20, 2010, 12:55:49 pm


Hackvision is a hackable retro-gaming system based on Arduino technology.  Connects directly to your TV with RCA cables.  No Arduino is required but you can write and upload your own games onto the ATmega328 chip using the Arduino IDE and a USB to serial cable or adapter.  It comes preloaded with two games (Space Invaders and Pong clones).  A button controller is built right on the PCB and you can add a Wii nunchuk controller, paddle controllers, or design any controller you like!

See the official site for all the other details and lots of documentation:  http://nootropicdesign.com/hackvision

Available as a kit or fully assembled/tested in the nootropic design store: http://nootropicdesign.com/store/index.php?main_page=products_all


This was a lot of work, but I think it turned out great!
142  Forum 2005-2010 (read only) / Exhibition / Re: Toolduino software for controlling your Arduino on: October 08, 2010, 09:37:16 am
Just a quick update: I've released Toolduino 1.1 which includes an image of the Arduino Uno and the ability to choose the board image from a menu.  http://nootropicdesign.com/toolduino/index.html

If other people have good quality images of other Arduino variants, I'd be happy to add them!  Anyone have a top-down image of a Diavolino or Seeeduino?  Or others? (If I weren't so busy, I'd externalize all the board information so people could easily add their own images).

143  Forum 2005-2010 (read only) / Exhibition / Re: Toolduino software for controlling your Arduino on: July 16, 2010, 07:32:32 am
I think it is important to show an image of the board rather than just a chip.  That way there is a 1-1 correspondence between what is on the screen and the Arduino board sitting next to the computer.  There's no visually-meaningful correlation between the Arduino pinout and the chip pinout.

Has anyone noticed what happens on the board image when you set pin 13 HIGH?  smiley-wink
144  Forum 2005-2010 (read only) / Exhibition / Re: Toolduino software for controlling your Arduino on: July 14, 2010, 12:08:16 pm
Hmm.  The Processing code simply performs Arduino.list() to get an array of Serial ports on the machine.  Maybe the Arduino Processing library doesn't work well on Linux....
You can try downloading the source and the two dependencies and running the application in the Processing IDE.  If it still doesn't work, you could set the serial port name manually (if you already happen to know it).

145  Forum 2005-2010 (read only) / Exhibition / Toolduino software for controlling your Arduino on: July 14, 2010, 07:58:46 am


I wrote a software tool for interacting with an Arduino board.  It allows you to test your circuits by manipulating outputs and reading inputs.

I've tested on Windows and Mac OS X, but not Linux (can anyone test?)

For more info, see
Blog post announcement: http://nootropicdesign.com/projectlab/2010/07/14/toolduino/
Toolduino details page: http://nootropicdesign.com/toolduino/

Hope this is useful to some people!  I use it myself quite often.

146  Forum 2005-2010 (read only) / Exhibition / Re: Arduino Breathalyzer on: September 21, 2010, 09:47:15 am
I think a lot of people are interested in calibrating the MQ-3 alcohol sensor to make a workable breathalyzer.  I spent a lot of time on this and did a big writeup on the project here:

http://nootropicdesign.com/projectlab/2010/09/17/arduino-breathalyzer/

Bottom line is that it's really hard to do!  Any ideas are very welcome.
147  Forum 2005-2010 (read only) / Exhibition / Re: Turn an Arduino into a USB I/O device - IOduino on: August 03, 2010, 03:16:39 pm
Cool, and I bet you learned a TON more by writing stuff yourself!
148  Forum 2005-2010 (read only) / Exhibition / Re: Turn an Arduino into a USB I/O device - IOduino on: August 03, 2010, 12:13:26 pm
Sounds interesting -- is it similar to the Firmata firmware that comes with the Arduino IDE?  Firmata allows you to control the Arduino device over a serial connection.  On the computer side, you can use a library like the Arduino library for Processing.  That's what I used to make Toolduino (http://nootropicdesign.com/toolduino/).

There's a Python library for talking to Firmata called pyduino: http://code.google.com/p/pyduino/

149  Forum 2005-2010 (read only) / Exhibition / Re: Shift Register Library on: July 28, 2010, 12:16:11 pm
I wrote a library for using shift registers here http://nootropicdesign.com/ez-expander/#library
I wrote this as an easy way to access the pins on my EZ-Expander product, but it can be used with any shift registers.  It currently assumes 2 shift register chips, but that could be generalized.  
The idea of the library is to make the pins on the shift registers usable in a way similar to ordinary Arduino pins.  e.g.
Code:
expander.digitalWrite(20, HIGH);

150  Forum 2005-2010 (read only) / Exhibition / Re: Wireless Robotics Platform on: March 05, 2010, 01:00:52 pm
Quote
Where did you get the car, anyhow?

It was just a toy that my kids didn't play with anymore.  I've seen some other projects that used the same vehicle: http://hackaday.com/2009/12/05/remote-controlled-robot-car-vs-solar-charged-tank/.  When you take the cover off the vehicle, there is a nice flat surface to build on.  My Arduino with standoffs sits nicely on the surface and the wiring prevents it from moving around.  Thanks for the suggestions.
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