http://www.simplecircuitdiagram.com Free Simple Circuit Diagram Tue, 24 Jan 2012 02:31:05 +0000 en hourly 1 http://wordpress.org/?v=abc http://www.simplecircuitdiagram.com/2011/11/21/digital-ph-meter-signal-conditioner/ http://www.simplecircuitdiagram.com/2011/11/21/digital-ph-meter-signal-conditioner/#comments Mon, 21 Nov 2011 11:41:01 +0000 Rust http://www.simplecircuitdiagram.com/?p=2761 A pH meter circuit is basically an amplifier to boost a voltage signal which is produced by a pH probe. The pH probe itself is equal to a battery cell when submersed in the measured solution, producing a weak voltage … Continue reading →]]> http://www.simplecircuitdiagram.com/2011/11/21/digital-ph-meter-signal-conditioner/feed/ 0 http://www.simplecircuitdiagram.com/2010/05/19/a-ph-probe-buffer-amplifier/ http://www.simplecircuitdiagram.com/2010/05/19/a-ph-probe-buffer-amplifier/#comments Wed, 19 May 2010 01:50:28 +0000 Rust http://www.simplecircuitdiagram.com/?p=1115 Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the following figure. The voltage error produced by the bias current and electrode … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/05/19/a-ph-probe-buffer-amplifier/feed/ 0 http://www.simplecircuitdiagram.com/2009/05/20/simple-ph-meter-circuit-a-low-cost-adapter-for-your-digital-voltmeter/ http://www.simplecircuitdiagram.com/2009/05/20/simple-ph-meter-circuit-a-low-cost-adapter-for-your-digital-voltmeter/#comments Wed, 20 May 2009 16:59:18 +0000 Adam http://www.simplecircuitdiagram.com/?p=92 What is A pH Meter? A pH meter is actually a precise voltmeter  that measures the generated voltage of a pH electrodes. The requirement of such meter is high input impedance and has the gain of  voltage-pH conversion. The standard … Continue reading →]]> http://www.simplecircuitdiagram.com/2009/05/20/simple-ph-meter-circuit-a-low-cost-adapter-for-your-digital-voltmeter/feed/ 0