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4434ElectroSim 2.0: Interactive Simulations of Basic Electronic and Operational Amplifier Circuits
http://www.merlot.org/merlot/viewMaterial.htm?id=76018
Real-time, theory-based interactive simulations of some simple electronic circuits that look just like the schematic diagrams in textbooks, yet actually work and respond to changes just like the real circuits. Free download. Covers Ohm's Law, Series and parallel resistors, Wheatstone bridge, Half-wave and Full-wave DC power supply, Simple, Zener-regulated power supply, Transistor switch driving a relay, Common Emitter AC mplifier, Operational amplifiers, Adder (summing amplifier) Subtractor (Difference amplifier), Photodiode photometer, Integrator, Differentiator, Voltage follower with transistor, output current booster, Programmable current driver with transistor output current booster. For Macintosh or Windows PC with Mac emulator.S.P.E.C.T.R.U.M. (Signal Processing for Experimental Chemistry Teaching and Research/ University of Maryland)
http://www.merlot.org/merlot/viewMaterial.htm?id=76024
Free downloadable program for processing of "spectral" or time-series data (y values at equally-spaced x intervals), such as spectra, chromatograms, electrochemical signals, etc. The program enhances the information content of instrument signals, for example by reducing noise, improving resolution, compensating for instrumental artifacts, testing hypotheses, and decomposing a complex signal into its component parts. Includes reference manual and tutorial. For Macintosh or Windows PC with Mac emulator.Interactive Computer Models for Analytical Chemistry Instruction
http://www.merlot.org/merlot/viewMaterial.htm?id=76075
Free downloadable interactive spreadsheet-based computer models for students of Instrumental Analysis and Spectrochemical Methods. Includes student assignment handouts. The mathematical basis for each model, including cell definitions and equations, is described. Includes:Color Temperature of a Blackbody Source; Animated Diffraction Grating; Photomultiplier Light Measurement System; Error propagation in Analytical Calibration; Multiwavelength Spectrometry; Lock-in Amplifier; Wavelength modulation system; U.V.-Vis. Photometer; Dual Wavelength Spectrophotometer; Instrumental Deviations from Beer's Law; Scanning Fluorescence Spectrophotometer; Signal and Photon SNR of Atomic Emission Spectrometer; Effect of Slit Width on Signal-to-Noise-Ratio; Line Wing Overlap; Spectroscopy of Atomic Absorption.