Curltable - development blog » arduino http://curltable.the-yard.net A snapshot of my projects. Tue, 10 Aug 2010 07:32:27 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 Use a potentiometer in XNA http://curltable.the-yard.net/curltable/use-a-potentiometer-in-xna http://curltable.the-yard.net/curltable/use-a-potentiometer-in-xna#comments Sat, 12 Dec 2009 15:13:33 +0000 David http://curltable.the-yard.net/?p=186 During my first researches on the curltable I thought it would be nice to have some functions controlled by external elements such as potentiometers, buttons or sliders. So I gave it a try and used my Arduino and the serialPort class for communication to the board. What I tried was to control the tempo of an audio track by a potentiometer. Normally a SerialPort.readline() should be enough to get the right data from the desired Port but in this case I tried to integrate it into XNA. The problem here is that your game can either run with a fixed or a variable timestep. If you are using a variable timestep in XNA the readline method should work for you, if not it will hang because of timing issues. To get around that I used the SerialPort.ReadExisting() method instead. This one is reading the date without any timeout. Different then the readline method you need to seperate your incoming information from binary data such as ‘\n’ (newline) and ‘\r’ (carriage return) on your own. Also sometimes the information you get from this method are incorrect or incomplete. So you need to check that too. I set up a little example which can be downloaded from here.

]]> http://curltable.the-yard.net/curltable/use-a-potentiometer-in-xna/feed 0 Pc talking to my Nikon D40 http://curltable.the-yard.net/blog/pc-talking-to-my-nikon-d40 http://curltable.the-yard.net/blog/pc-talking-to-my-nikon-d40#comments Thu, 26 Nov 2009 10:36:59 +0000 David http://curltable.the-yard.net/?p=74 I was working lately on a simple peace of program to control my Nikon D40 by a PC. This little app communicates through my Arduino board with the camera. To get my d40 to capture something I used a bit of code from Gustav von Roth which can be found here. This Code sends a signal over an IR Led to generate time lapse effects. An example is shown below.

I captured about 1 hour with an interval of 1000ms in this example. The Code and Arduino Sketch can be downloaded from here. If you have any problems with setting this up feel free to leave a comment. The next Version will include some Servo controlling to move the camera while capturing.

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