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	<description>old-school circuits and electronic design</description>
	<lastBuildDate>Mon, 27 Jun 2011 08:12:59 +0000</lastBuildDate>
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		<title>TIP: Cleaning veroboard</title>
		<link>http://darrenyates.com.au/electronics/archives/62</link>
		<comments>http://darrenyates.com.au/electronics/archives/62#comments</comments>
		<pubDate>Mon, 27 Jun 2011 08:12:59 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[Cleaning veroboard]]></category>
		<category><![CDATA[copper circuitboards]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=62</guid>
		<description><![CDATA[Very simple tip: veroboard and other copper-clad circuitboards are great for whacking together one-off projects but if you keep them stored, they can become hard to solder. This is particularly true if you&#8217;ve touched the copper. The problem is the &#8230; <a href="http://darrenyates.com.au/electronics/archives/62">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>10. The Darlington Transistor</title>
		<link>http://darrenyates.com.au/electronics/archives/59</link>
		<comments>http://darrenyates.com.au/electronics/archives/59#comments</comments>
		<pubDate>Fri, 08 Apr 2011 03:55:43 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[Darlington Transistor]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=59</guid>
		<description><![CDATA[All of the transistors we&#8217;ve looked so far a single-stage transistors. However, play with enough circuits and you&#8217;ll come up against a special dual-stage transistor called the Darlington Transistor. You can buy them in ready-made packages or you can roll &#8230; <a href="http://darrenyates.com.au/electronics/archives/59">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>9. Two-phase squarewave oscillator</title>
		<link>http://darrenyates.com.au/electronics/archives/50</link>
		<comments>http://darrenyates.com.au/electronics/archives/50#comments</comments>
		<pubDate>Fri, 08 Apr 2011 03:35:55 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[Astable multivibrator]]></category>
		<category><![CDATA[tone generator]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=50</guid>
		<description><![CDATA[It&#8217;s one of the simplest circuits to get working but one of the more tricky to understand. This simple two-transistor oscillator has a technical name of &#8220;astable multivibrator&#8221; and provides a squarewave (of sorts) output in and out of phase. &#8230; <a href="http://darrenyates.com.au/electronics/archives/50">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>8. 20-second delay timer</title>
		<link>http://darrenyates.com.au/electronics/archives/44</link>
		<comments>http://darrenyates.com.au/electronics/archives/44#comments</comments>
		<pubDate>Thu, 07 Apr 2011 09:33:58 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[delay]]></category>
		<category><![CDATA[timer]]></category>
		<category><![CDATA[zener diode]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=44</guid>
		<description><![CDATA[Delay circuits are pretty common however, nine out of ten will use a 555 timer IC. The 555 is an impressive little chip but it can do so much more than just create delayed output pulses. You can do that &#8230; <a href="http://darrenyates.com.au/electronics/archives/44">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>7. Simple white noise generator</title>
		<link>http://darrenyates.com.au/electronics/archives/40</link>
		<comments>http://darrenyates.com.au/electronics/archives/40#comments</comments>
		<pubDate>Wed, 30 Mar 2011 23:42:53 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[circuits]]></category>
		<category><![CDATA[white noise generator]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=40</guid>
		<description><![CDATA[This circuit probably looks all wrong &#8211; we&#8217;ve got an NPN transistor with its base connected to ground, the emitter connected to the positive supply railvia a resistor and the collector hanging out in the breeze! If we&#8217;re trying to &#8230; <a href="http://darrenyates.com.au/electronics/archives/40">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>6. Discrete logic</title>
		<link>http://darrenyates.com.au/electronics/archives/37</link>
		<comments>http://darrenyates.com.au/electronics/archives/37#comments</comments>
		<pubDate>Wed, 23 Mar 2011 09:01:56 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[AND]]></category>
		<category><![CDATA[circuits]]></category>
		<category><![CDATA[digital logic]]></category>
		<category><![CDATA[OR]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=37</guid>
		<description><![CDATA[One of the very early uses for transistors was what&#8217;s known as digital logic circuitry. It was the precursor to the CPUs and memory and the scores of digital devices we know today. Digital circuitry was initially built using discrete &#8230; <a href="http://darrenyates.com.au/electronics/archives/37">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>0</slash:comments>
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		<title>5. Cheaper 5V regulator</title>
		<link>http://darrenyates.com.au/electronics/archives/31</link>
		<comments>http://darrenyates.com.au/electronics/archives/31#comments</comments>
		<pubDate>Wed, 23 Mar 2011 06:38:03 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[7805]]></category>
		<category><![CDATA[circuits]]></category>
		<category><![CDATA[LM317]]></category>
		<category><![CDATA[three-pin regulator]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=31</guid>
		<description><![CDATA[With USB-powered devices all the rage, there have been quite a few circuits floating around offering a 5V regulator to power something USB. Unfortunately, many of the circuits use an LM317 three-pin regulator IC. Now it&#8217;s not a bad IC &#8230; <a href="http://darrenyates.com.au/electronics/archives/31">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<title>4. Discrete one-watt RMS audio amplifier</title>
		<link>http://darrenyates.com.au/electronics/archives/25</link>
		<comments>http://darrenyates.com.au/electronics/archives/25#comments</comments>
		<pubDate>Wed, 23 Mar 2011 05:40:12 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[audio output amplifier]]></category>
		<category><![CDATA[circuits]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=25</guid>
		<description><![CDATA[Back in the February 1994, issue of Silicon Chip magazine, I did a project called the CHAMP, the &#8220;cheap &#38; handy amplifier&#8221;. However, the one thing I&#8217;ve regretted is that it was based on an LM386 chip. There&#8217;s nothing particularly &#8230; <a href="http://darrenyates.com.au/electronics/archives/25">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>3. Discrete audio preamp</title>
		<link>http://darrenyates.com.au/electronics/archives/16</link>
		<comments>http://darrenyates.com.au/electronics/archives/16#comments</comments>
		<pubDate>Wed, 23 Mar 2011 01:52:05 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[circuits]]></category>
		<category><![CDATA[two-transistor preamplifier]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=16</guid>
		<description><![CDATA[Transistors aren&#8217;t just good for DC circuits, they&#8217;re pretty passable at amplifier audio signals too. However, they need some work. They&#8217;re not exactly linear in the voltage/current transfer (input to output) and need some extra circuitry to knock them into &#8230; <a href="http://darrenyates.com.au/electronics/archives/16">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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		</item>
		<item>
		<title>2. Adding protection to the 5V regulator</title>
		<link>http://darrenyates.com.au/electronics/archives/12</link>
		<comments>http://darrenyates.com.au/electronics/archives/12#comments</comments>
		<pubDate>Tue, 22 Mar 2011 22:55:54 +0000</pubDate>
		<dc:creator>darren</dc:creator>
				<category><![CDATA[Circuits]]></category>
		<category><![CDATA[circuits]]></category>

		<guid isPermaLink="false">http://darrenyates.com.au/electronics/?p=12</guid>
		<description><![CDATA[One issue the original 5V regulator circuit has is that it relies on you getting the input power polarity right. Plugging in the DC volts the wrong way around will blow the 470uF/25VW electrolytic capacitor and probably won&#8217;t do the &#8230; <a href="http://darrenyates.com.au/electronics/archives/12">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
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