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	<title>delabs Schematics - Electronic Circuit &#187; Discrete-Circuits</title>
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	<description>Electronic Schematic Diagrams of delabs</description>
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		<title>Ohmmeter &#8211; Simple Resistance Measurement</title>
		<link>http://www.electronics-circuits.com/tech/2009/02/ohmmeter-simple-resistance-measurement/</link>
		<comments>http://www.electronics-circuits.com/tech/2009/02/ohmmeter-simple-resistance-measurement/#comments</comments>
		<pubDate>Tue, 17 Feb 2009 10:40:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>
		<category><![CDATA[Test-Measurement]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2009/02/ohmmeter-simple-resistance-measurement/</guid>
		<description><![CDATA[Measurement of resistor values in circuit configurations are required to be made often, as these might have changed in value due to various tolerance ranges, and hence could be the cause of faults. Likewise the resistance of components used in a circuit, may need to be known. In such cases the measurement of resistance is <a href='http://www.electronics-circuits.com/tech/2009/02/ohmmeter-simple-resistance-measurement/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
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		<title>Voltage Doublers and Multipliers</title>
		<link>http://www.electronics-circuits.com/tech/2008/12/voltage-doublers-and-multipliers/</link>
		<comments>http://www.electronics-circuits.com/tech/2008/12/voltage-doublers-and-multipliers/#comments</comments>
		<pubDate>Wed, 24 Dec 2008 03:10:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>
		<category><![CDATA[Power-Supplies]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2008/12/voltage-doublers-and-multipliers/</guid>
		<description><![CDATA[Voltage multipliers are used to obtain low current high voltage, from an existing AC Source. Step up transformers can be used, but the insulation problems and care that has to be taken for HV above 1kV, make it difficult. After SMPS technologies and Ferrites were developed, HV for CRTs was generated by blocking oscillators and <a href='http://www.electronics-circuits.com/tech/2008/12/voltage-doublers-and-multipliers/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Flashing Mains Neon Lamp</title>
		<link>http://www.electronics-circuits.com/tech/2008/04/flashing-mains-neon-lamp/</link>
		<comments>http://www.electronics-circuits.com/tech/2008/04/flashing-mains-neon-lamp/#comments</comments>
		<pubDate>Thu, 10 Apr 2008 11:29:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>
		<category><![CDATA[Mains-Power]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2008/04/flashing-mains-neon-lamp/</guid>
		<description><![CDATA[Here is a Neon Flasher circuit (untested) for a user request at Elex Quna. This can be built into a switchboard or a gadget for indicating Live Power. D1-C1 form a simple half-wave rectifier, The Cap charges to peak voltage and can store charge for a long time if there is no bleeder. So while <a href='http://www.electronics-circuits.com/tech/2008/04/flashing-mains-neon-lamp/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Voltage Doubler</title>
		<link>http://www.electronics-circuits.com/tech/2007/02/voltage-doubler/</link>
		<comments>http://www.electronics-circuits.com/tech/2007/02/voltage-doubler/#comments</comments>
		<pubDate>Fri, 02 Feb 2007 01:11:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2007/02/voltage-doubler/</guid>
		<description><![CDATA[This is a Simple Voltage Doubler to boost 3V battery voltage to power some low-power 5V circuits. In needs a Clock input with high fan-out. You can use the 74HCT540 in parallel. Work with the Audio frequency range and see. If you feed a Low Impedance Square wave, like output of 555, which has adequate <a href='http://www.electronics-circuits.com/tech/2007/02/voltage-doubler/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>FET Current Source and MOSFET</title>
		<link>http://www.electronics-circuits.com/tech/2007/02/fet-current-source/</link>
		<comments>http://www.electronics-circuits.com/tech/2007/02/fet-current-source/#comments</comments>
		<pubDate>Thu, 01 Feb 2007 11:45:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>
		<category><![CDATA[LED-Circuits]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2007/02/fet-current-source/</guid>
		<description><![CDATA[This is a constant current source using a FET. This is the most simple replacement to series resistor to limit current. The N-Channel FET BF256C can give 15mA current. Simple Methods Before you get to use chips, experiment with some methods, which will help you learn about the LEDs better. The first is just One <a href='http://www.electronics-circuits.com/tech/2007/02/fet-current-source/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Constant Current Source LED Drive</title>
		<link>http://www.electronics-circuits.com/tech/2007/02/constant-current-source-led-drive/</link>
		<comments>http://www.electronics-circuits.com/tech/2007/02/constant-current-source-led-drive/#comments</comments>
		<pubDate>Thu, 01 Feb 2007 16:16:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>
		<category><![CDATA[LED-Circuits]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2007/02/constant-current-source-led-drive/</guid>
		<description><![CDATA[This is a Constant Current Source LED Driver, When the LED driver Upper-NPN is driven by a voltage thru 4.7K the LED lights up. Assume that the Lower-NPN at bottom is absent. The current via LED and NPN is limited by R. 20mA may be ok 15mA even better. Or LED blows even transistor goes. <a href='http://www.electronics-circuits.com/tech/2007/02/constant-current-source-led-drive/'>Read More ...</a>]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Relay Driver &#8211; Electromagnetic</title>
		<link>http://www.electronics-circuits.com/tech/2005/12/relay-driver-electromagnetic/</link>
		<comments>http://www.electronics-circuits.com/tech/2005/12/relay-driver-electromagnetic/#comments</comments>
		<pubDate>Mon, 19 Dec 2005 17:58:00 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Discrete-Circuits]]></category>

		<guid isPermaLink="false">http://www.electronics-circuits.com/tech/2005/12/relay-driver-electromagnetic/</guid>
		<description><![CDATA[The above is a standard way of driving Small Power Relays from Control Signals generated by Logic or Opamp Circuits. C2 and R5 form a snubber which improves the life of the metal contacts, the contacts can erode due to sparking when switching inductive or even big loads. reduces EMI_RFI. The Electromagnetic Solenoid Coil is <a href='http://www.electronics-circuits.com/tech/2005/12/relay-driver-electromagnetic/'>Read More ...</a>]]></description>
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		<slash:comments>0</slash:comments>
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