http://www.elecfree.com/electronic/salt-taster-by-lm324/ Sat, 20 Mar 2010 11:56:13 +0000 http://wordpress.org/?v=2.6.5 http://www.elecfree.com/electronic/salt-taster-by-lm324/#comment-1803 Salt-Taster by LM324 | Wiparat Circuit Electronics Tue, 11 Aug 2009 03:50:35 +0000 http://www.elecfree.com/electronic/salt-taster-by-lm324/#comment-1803 [...] This circuit was designed to detect the approximate percentage of salt contained in a liquid. After careful setting it can be useful to persons needing a quick, rough indication of the salt content in liquid foods for diet purposes etc. IC1A op-amp is wired as a DC differential amplifier and its output voltage increases as the DC resistance measured across the probes decreases. In fact, fresh water has a relatively high DC resistance value that will decrease proportionally as an increasing amount of salt is added. [....] Link [...] [...] This circuit was designed to detect the approximate percentage of salt contained in a liquid. After careful setting it can be useful to persons needing a quick, rough indication of the salt content in liquid foods for diet purposes etc. IC1A op-amp is wired as a DC differential amplifier and its output voltage increases as the DC resistance measured across the probes decreases. In fact, fresh water has a relatively high DC resistance value that will decrease proportionally as an increasing amount of salt is added. [....] Link [...]

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