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	<title>PCWong</title>
	<link>http://pui.chorwong.com/devry/index.php</link>
	<description>PCWong WordPress weblog</description>
	<pubDate>Mon, 07 May 2012 14:05:13 +0000</pubDate>
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		<title>A different DPST switch</title>
		<link>http://pui.chorwong.com/devry/index.php/?p=137</link>
		<comments>http://pui.chorwong.com/devry/index.php/?p=137#comments</comments>
		<pubDate>Fri, 25 Nov 2011 05:46:58 +0000</pubDate>
		<dc:creator>pcwong</dc:creator>
		
		<category>Education</category>

		<category>electronics</category>

		<guid isPermaLink="false">http://pui.chorwong.com/devry/index.php/?p=137</guid>
		<description><![CDATA[Today the students use a dip switch which is one that I have not seen before. It is modified from a traditional dip switch which has 8 SPST switches:

When I tested the modified dip switch using the first set of switch which has 4 contacts or 4 pins, I found out the schematic of the [...]]]></description>
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		<title>Active HIGH or Active LOW</title>
		<link>http://pui.chorwong.com/devry/index.php/?p=136</link>
		<comments>http://pui.chorwong.com/devry/index.php/?p=136#comments</comments>
		<pubDate>Wed, 23 Nov 2011 19:21:51 +0000</pubDate>
		<dc:creator>pcwong</dc:creator>
		
		<category>Education</category>

		<category>electronics</category>

		<guid isPermaLink="false">http://pui.chorwong.com/devry/index.php/?p=136</guid>
		<description><![CDATA[These two terms confused a lot of people. What is it?
Any logical point has a level HIGH or LOW. Adding the word &#8220;active&#8221; implies some meaning. From my experience is that if we use it for positive logic, that is, use the HIGH, we called this point or line is active HIGH, and if we [...]]]></description>
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		<title>Some tricks I learned when designing digital circuit</title>
		<link>http://pui.chorwong.com/devry/index.php/?p=135</link>
		<comments>http://pui.chorwong.com/devry/index.php/?p=135#comments</comments>
		<pubDate>Wed, 23 Nov 2011 19:05:04 +0000</pubDate>
		<dc:creator>pcwong</dc:creator>
		
		<category>Education</category>

		<category>electronics</category>

		<guid isPermaLink="false">http://pui.chorwong.com/devry/index.php/?p=135</guid>
		<description><![CDATA[I learned in the past that you can turn a NAND gate into an inverter:
Say NAND gate is (A*B)&#8217; and when you make or force B to be 1 or HIGH, then we have (A*1)&#8217; which is simply A&#8217; so A is inverted.
Same idea is for NOR gate. NOR is (A+B)&#8217;. When B is forced [...]]]></description>
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		<title>Logical Error</title>
		<link>http://pui.chorwong.com/devry/index.php/?p=134</link>
		<comments>http://pui.chorwong.com/devry/index.php/?p=134#comments</comments>
		<pubDate>Mon, 21 Nov 2011 17:12:47 +0000</pubDate>
		<dc:creator>pcwong</dc:creator>
		
		<category>Education</category>

		<category>electronics</category>

		<guid isPermaLink="false">http://pui.chorwong.com/devry/index.php/?p=134</guid>
		<description><![CDATA[Here is the image that I corrected from the lecture:

It is so obvious because NAND is NOT AND, NOR is NOT OR, NOT is NOT, NOT is represented by a single bar, a double bar is NOT NOT which will cancel each other.
If we have NOT NOT A , it will be just simply A. [...]]]></description>
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		<item>
		<title>Using Programmer&#8217;s calculator with PC calculator</title>
		<link>http://pui.chorwong.com/devry/index.php/?p=133</link>
		<comments>http://pui.chorwong.com/devry/index.php/?p=133#comments</comments>
		<pubDate>Wed, 16 Nov 2011 18:10:27 +0000</pubDate>
		<dc:creator>pcwong</dc:creator>
		
		<category>Education</category>

		<category>electronics</category>

		<guid isPermaLink="false">http://pui.chorwong.com/devry/index.php/?p=133</guid>
		<description><![CDATA[Type calc to run the PC calculator and then choose from VIEW the programmer or using Alt+3 key, you can use the programmer&#8217;s calculator which help in number representation and conversions.

By default, the number entered is in decimals and you can see the interface will allow you to see the number in various format such [...]]]></description>
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