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	<title>Achu&#039;s TechBlog</title>
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	<link>http://achuwilson.wordpress.com</link>
	<description>My Tech Stuff</description>
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		<title>Achu&#039;s TechBlog</title>
		<link>http://achuwilson.wordpress.com</link>
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		<item>
		<title>GSM Controlled Robot Car</title>
		<link>http://achuwilson.wordpress.com/2012/07/07/gsm-controlled-robot-car/</link>
		<comments>http://achuwilson.wordpress.com/2012/07/07/gsm-controlled-robot-car/#comments</comments>
		<pubDate>Sat, 07 Jul 2012 13:38:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[DIY]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[GSM Robot]]></category>
		<category><![CDATA[robot]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/07/07/gsm-controlled-robot-car</guid>
		<description><![CDATA[This is a Robot car which can be controlled using any mobile phone. This was a project I did years ago, while learning digital electronics in the college. It was a time when I knew only less about microcontroller programming else almost the whole circuit could be replaced by a small microcontroller. The  mobile phone [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=653&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Speech Recognition in ROS / Linux</title>
		<link>http://achuwilson.wordpress.com/2012/06/30/speech-recognition-in-ros-linux/</link>
		<comments>http://achuwilson.wordpress.com/2012/06/30/speech-recognition-in-ros-linux/#comments</comments>
		<pubDate>Sat, 30 Jun 2012 10:39:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Julius]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[speech recognition]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/06/30/speech-recognition-in-ros-linux</guid>
		<description><![CDATA[Speech recognition in ROS/Linux has been has been traditionally done using projects like CMU-Sphinx or Julius. But they lack an efficient vocabulary  and is not stable. So reliable speech recognition was confined to Windows/Mac users only. Initially I was using a windows virtual  machine inside ubuntu to do speech processing, even though it was quite [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=655&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/06/30/speech-recognition-in-ros-linux/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<title>SMART NOTICE BOARD</title>
		<link>http://achuwilson.wordpress.com/2012/06/26/smart-notice-board/</link>
		<comments>http://achuwilson.wordpress.com/2012/06/26/smart-notice-board/#comments</comments>
		<pubDate>Tue, 26 Jun 2012 16:58:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[avr]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[GSM]]></category>
		<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[Projects]]></category>
		<category><![CDATA[VGA]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/06/26/smart-notice-board</guid>
		<description><![CDATA[This  Notice Board is quite smart. It is a re-purposed  unused old LCD monitor. The messages to be displayed on the notice board ( an old LCD monitor) can be sent from any mobile phone. The user should also provide an authentication code for the message to be displayed. The video below shows it.   [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=657&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>6</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Long range RF link using NRF24L01+ RF Transceiver</title>
		<link>http://achuwilson.wordpress.com/2012/05/18/long-range-rf-link-using-nrf24l01-rf-transceiver/</link>
		<comments>http://achuwilson.wordpress.com/2012/05/18/long-range-rf-link-using-nrf24l01-rf-transceiver/#comments</comments>
		<pubDate>Fri, 18 May 2012 06:31:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[arduino]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[Nordic]]></category>
		<category><![CDATA[NRF24L01]]></category>
		<category><![CDATA[PL2303]]></category>
		<category><![CDATA[Projects]]></category>
		<category><![CDATA[RF]]></category>
		<category><![CDATA[USB to sserial]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/05/18/long-range-rf-link-using-nrf24l01-rf-transceiver</guid>
		<description><![CDATA[Creating a two way wireless link is fun and exciting. Recently I  ordered  some RF modules based on NRF 24L01+ transciver  from sparkfun (link here or here). Ready-made RF transceivers like this saves the hobbyist from designing RF circuits and PCBs which can get quite complex and expensive. All you have to do is configure the required registers, put [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=661&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/05/18/long-range-rf-link-using-nrf24l01-rf-transceiver/feed/</wfw:commentRss>
		<slash:comments>8</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Automatic Curtain Controller</title>
		<link>http://achuwilson.wordpress.com/2012/04/15/automatic-curtain-controller/</link>
		<comments>http://achuwilson.wordpress.com/2012/04/15/automatic-curtain-controller/#comments</comments>
		<pubDate>Sun, 15 Apr 2012 07:04:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[avr]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[Projects]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/04/15/automatic-curtain-controller</guid>
		<description><![CDATA[This curtain controller uses a microcontroller to control the opening of  curtain veils, thus enabling the control of light intensity in the room. It features both automatic mode and manual override mode. In the automatic mode, we can set the preferred intensity level in the room using a pot and the control system will adjust [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=663&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/04/15/automatic-curtain-controller/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<media:content url="http://achuwilson.files.wordpress.com/2012/04/ckt_fin.jpg" medium="image" />

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	</item>
		<item>
		<title>URDF Model Of Chippu</title>
		<link>http://achuwilson.wordpress.com/2012/04/08/urdf-model-of-chippu/</link>
		<comments>http://achuwilson.wordpress.com/2012/04/08/urdf-model-of-chippu/#comments</comments>
		<pubDate>Sun, 08 Apr 2012 13:00:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[chippu]]></category>
		<category><![CDATA[robot]]></category>
		<category><![CDATA[ROS]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/2012/04/08/urdf-model-of-chippu</guid>
		<description><![CDATA[       URDF stands for Unified Robot Description Format, Which is an XML format for representing the model of the robot. More info about the URDF can be had from the tutorials at ros.org. Once we have the URDF model of our robot, we can use it in rviz to visualize what the robot [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=665&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/04/08/urdf-model-of-chippu/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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	</item>
		<item>
		<title>HSV Pixel Values in OpenCV</title>
		<link>http://achuwilson.wordpress.com/2012/02/14/hsv-pixel-values-in-opencv/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/14/hsv-pixel-values-in-opencv/#comments</comments>
		<pubDate>Tue, 14 Feb 2012 17:40:52 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[OPENCV]]></category>
		<category><![CDATA[HSV]]></category>
		<category><![CDATA[opencv]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=489</guid>
		<description><![CDATA[HSV color space is more often used in machine vision owing to its superior performance compared to RGB color space in varying illumination levels. Often thresholding and masking is done in HSV color space. So it is very important to know the HSV values of the color which we want to filter out. HSV color [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=489&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/02/14/hsv-pixel-values-in-opencv/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Chippu gets new Hardware</title>
		<link>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/#comments</comments>
		<pubDate>Tue, 14 Feb 2012 07:49:31 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[Projects]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[components]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[motor controller board]]></category>
		<category><![CDATA[robot controller]]></category>
		<category><![CDATA[Wiring]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=483</guid>
		<description><![CDATA[Chippu has now upgraded its hardware, and is now much smarter. The Atmega32 is replaced by a more powerful and feature rich Atmega128 based Wiring Board. It has  53 I/O pins, 8 analog inputs, 2 hardware serial ports, 6 PWM (analog outputs), SPI, TWI, 8 external interrupts pins. Also it can drive a maximum of 24 [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=483&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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			<media:title type="html">13022012526</media:title>
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			<media:title type="html">13022012528</media:title>
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			<media:title type="html">13022012541</media:title>
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		<item>
		<title>WIRING: a low cost alternative to Arduino</title>
		<link>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/#comments</comments>
		<pubDate>Mon, 13 Feb 2012 19:03:55 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Hacks]]></category>
		<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[robot controller]]></category>
		<category><![CDATA[RS232]]></category>
		<category><![CDATA[USB to sserial]]></category>
		<category><![CDATA[Wiring]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=470</guid>
		<description><![CDATA[I was using an Atmega32 based Arduino  clone for the low level hardware control of  my personal robot Chippu. But soon ran  into problems  as the code size increased and  the inbuilt RAM of 2kb overflowed often, and it caused the ROS node running on Arduino to go out of sync. Also I needed to [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=470&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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			<media:title type="html">PinsWiringV1.0</media:title>
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		<title>Indian Online Shops selling Electronics &amp; Robotics Components</title>
		<link>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/</link>
		<comments>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/#comments</comments>
		<pubDate>Mon, 30 Jan 2012 14:52:44 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[components]]></category>
		<category><![CDATA[online shops]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=452</guid>
		<description><![CDATA[There are a handful of online shops in india that provides electronics components. Some of them specilizes in robotics components alone, while some specializes in embedded boards, while some others provides all types of components and boards. The prices of the same component varies greatly among different shops, so it is wise to refer as [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&#038;blog=18612494&#038;post=452&#038;subd=achuwilson&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/feed/</wfw:commentRss>
		<slash:comments>8</slash:comments>
	
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