0xDEADBEEFCAFE http://blog.naxsoft.com Mind-dump Mon, 19 Dec 2011 22:25:16 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Subversion, Git and mercurial hosting http://blog.naxsoft.com/2011/12/subversion-git-and-mercurial-hosting/ http://blog.naxsoft.com/2011/12/subversion-git-and-mercurial-hosting/#comments Mon, 19 Dec 2011 22:25:16 +0000 elendal http://blog.naxsoft.com/?p=763 If you want SVN, git or mercurial hosting I recommend XP-Dev.com, me and Dave used it for a while now and it is pretty reliable and they resolve issues (ownership transfer, payment, technical questions) quickly.

]]> http://blog.naxsoft.com/2011/12/subversion-git-and-mercurial-hosting/feed/ 0 Getting Started Programming with Qt http://blog.naxsoft.com/2011/09/qt-getting-started-programming-with-qt/ http://blog.naxsoft.com/2011/09/qt-getting-started-programming-with-qt/#comments Wed, 14 Sep 2011 05:55:35 +0000 elendal http://blog.naxsoft.com/?p=760 I’m in process of learning QT framework. It is a cross-platform user interface that has been around for years, and a lot of successful applications (like KDE) use it, yet I found the bug in the most unusual place – “Getting Started Programming with Qt” tutorial. Oh well, nobody reads documentation anyway.

]]> http://blog.naxsoft.com/2011/09/qt-getting-started-programming-with-qt/feed/ 0 Robot updates http://blog.naxsoft.com/2011/08/robot-updates/ http://blog.naxsoft.com/2011/08/robot-updates/#comments Wed, 31 Aug 2011 16:26:27 +0000 elendal http://blog.naxsoft.com/?p=749

]]> http://blog.naxsoft.com/2011/08/robot-updates/feed/ 0 2A DC Motor Controller http://blog.naxsoft.com/2011/08/2a-dc-motor-controller/ http://blog.naxsoft.com/2011/08/2a-dc-motor-controller/#comments Tue, 23 Aug 2011 21:44:40 +0000 elendal http://blog.naxsoft.com/?p=741 There are basically two kinds of L298N based dual bi-directional motor controllers available on ebay, both are very similar but one is better:

l298n MD1.3_2A_Dual_Motor_Controller

The one on the left requires 6 signals: two to control direction (in1,in2) (in3, in4) for each h-bridge and one wire for PWM (en1) (en2) for each motor to control speed.

The one on the right (produced by DFRobot) uses 74HC00 and requires only 4 signals: direction is controlled by logic level (0, 5v) and speed by PWM.

They both cost about the same.

]]> http://blog.naxsoft.com/2011/08/2a-dc-motor-controller/feed/ 0 http://blog.naxsoft.com/2011/08/736/ http://blog.naxsoft.com/2011/08/736/#comments Mon, 15 Aug 2011 01:44:03 +0000 elendal http://blog.naxsoft.com/?p=736 I configured KST to display sensor data in real-time. KST is a really nice, simple to use graphing package.

Graphs from raw values of LSM303DLH and L3G4200D.

 

]]> http://blog.naxsoft.com/2011/08/736/feed/ 0 Sensor data http://blog.naxsoft.com/2011/08/sensor-data/ http://blog.naxsoft.com/2011/08/sensor-data/#comments Sun, 14 Aug 2011 06:44:17 +0000 elendal http://blog.naxsoft.com/?p=730 Graphs from raw values of LSM303DLH and L3G4200D.

1 2 3 ]]> http://blog.naxsoft.com/2011/08/sensor-data/feed/ 0 Initial code dump for my robot http://blog.naxsoft.com/2011/08/initial-code-dump-for-my-robot/ http://blog.naxsoft.com/2011/08/initial-code-dump-for-my-robot/#comments Fri, 12 Aug 2011 06:24:19 +0000 elendal http://blog.naxsoft.com/?p=727 Here is initial code dump for my robot.
https://github.com/igouss/RobotProto

The only interesting part so far is my implementation of thrift rpc protocol and xbee transport.
Also you can find there code to that gets readings from LSM303DLH 3D Compass and Accelerometer and from L3G4200D 3-Axis gyroscope and code to control TLC5940 PWM controller that I will use to control motors.

]]> http://blog.naxsoft.com/2011/08/initial-code-dump-for-my-robot/feed/ 1 MacPorts on MacOS lion http://blog.naxsoft.com/2011/08/macports-on-macos-lion/ http://blog.naxsoft.com/2011/08/macports-on-macos-lion/#comments Thu, 11 Aug 2011 05:34:33 +0000 elendal http://blog.naxsoft.com/?p=724 If you install XCode from AppStore and receive this error: 
"MacPorts can’t be installed on this computer.
Xcode is not installed, or was installed with UNIX Development (10.5+) or Command Line Support (10.4) deselected."
You need to complete the XCode installation by running "Install XCode.app" from your Application folder.
]]> http://blog.naxsoft.com/2011/08/macports-on-macos-lion/feed/ 0 Analogy http://blog.naxsoft.com/2011/07/analogy/ http://blog.naxsoft.com/2011/07/analogy/#comments Sun, 31 Jul 2011 03:22:22 +0000 elendal http://blog.naxsoft.com/?p=721 Voltage — km/hour
Amperage — kg/hour

RPM from voltage, torque from amps

]]> http://blog.naxsoft.com/2011/07/analogy/feed/ 0 Boarduino pins PWM and analog and digital http://blog.naxsoft.com/2011/07/boarduino-pins-pwm-and-analog-and-digital/ http://blog.naxsoft.com/2011/07/boarduino-pins-pwm-and-analog-and-digital/#comments Fri, 29 Jul 2011 20:16:21 +0000 elendal http://blog.naxsoft.com/?p=718 /* * Digital pins (0-13) are accessed using digitalRead(), digitalWrite(), and analogWrite(). * The analog pins (A0-A5) are accessed only using analogRead(). * * DigitalRead/DigitalWrite applies to 0-19 (20 I/O lines), PinMode is explicitly required for these calls. * AnalogRead applies to 0-5 (Which would be digital 14-19), no PinMode call required. * AnalogWrite applies to 3,5,6,9,10,11, (same mapping as the digital pins.) no PinMode call required. * Using analogWrite on any of the other digital pins will digitalWrite a 1 if >127 or a 0 if <= 127, and * the PinMode is still done for you. */ ]]> http://blog.naxsoft.com/2011/07/boarduino-pins-pwm-and-analog-and-digital/feed/ 0