Auto Calculators & Various References Links                                             

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We have collected many auto calculators that may simplify sometimes complex design task. Many auto calculators are created to specific application. Some auto calculators have been created within a school project. If you know someone who created auto calculator and would like to share it with public, please contact us. It does not have to be electronics related one. We will gladly add new auto calculator to already large collection.   ADD MY AUTOCALCULATOR

AMZ Op-Amp Noise Calculator - enter nV/root Hz Equivalent Input Noise Voltage, pA/root Hz Equivalent Input Noise Current, ohms, Non-inverting resistance, ohms, Inverting resistance.  http://www.muzique.com/schem/opcalc.htm
Excel formula calculates standard 1% resistor values  Presented Excle formula calculates the nearest standard 1% resistor value without using a lookup table or macro. Type or electronically paste presented formula text into any cell, other than A1. The formula will calculate the nearest 1% resistor for the value in cell A1.  Electronic Design Magazine, Jan 21, 2001, Ideas for design, page 52.  83_Excel-formula_calculates_standard_1%_resistor_values_jpg_176kB    
Signal to Noise Ratio Autocalculator - using Excel  SNR_Autocalculator
Resistive Divider Autocalculator  - using Excel  Resistive Divider Autocalculator
Calculators On Line Center - Jim Martindale  http://www-sci.lib.uci.edu/HSG/RefCalculators4.html
G - Weighting Ultrasonic  calculator  http://www.measure.demon.co.uk/Acoustics_Software/g_weight.html
A,B,C,U,AU Weighting  calculator  http://www.measure.demon.co.uk/Acoustics_Software/a_weight.html
A, B, C Weighting Feature    http://www.termpro.com/articles/weight.html
A, B, C, D Weighting Feature    http://www.norsonic.com/ProductsAndUses.php?menu=uses&finale=1531&nivaa=3
D - Weighted Sound Level: DLm (Historicall dB(D)  http://www.nonoise.org/library/ane/ane.htm#sect2.2.2
A Weighting Formula & Acoustics FAQ    http://www.campanellaacoustics.com/faq.htm#basic_power
Noise Weighting Curves  http://www.lindev.com/noiswt.htm
Speaker Level Per Power, Distance calculator   http://www.stageaccompany.com/splcalc/splcalc.html
dBm-Voltage-Impedance  calculator  http://www.opamplabs.com/dbm-v-z.htm
Balanced Noise Criterion calculator  http://www.measure.demon.co.uk/Acoustics_Software/ncb_calc.html
Capacitance-Frequency-Inductance  calculator  http://www.opamplabs.com/cfl.htm
Resistance-Frequency-Capacitance  calculator   http://www.opamplabs.com/rfc.htm
Voltage-Current-Resistance-Power  calculator  http://www.opamplabs.com/eirp.htm
L or C Reactance - Capacitive or inductive reactance and resonant frequency. For ideal devices only, resistance not included  http://ourworld.compuserve.com/homepages/Bill_Bowden/XLC.htm
R and L Time Calculator   http://ourworld.compuserve.com/homepages/Bill_Bowden/rl.htm
Speed of Sound  calculator  http://www.measure.demon.co.uk/Acoustics_Software/speed.html
Absorption Coefficient  calculator   http://physics.mtsu.edu/~wmr/reverb_2.htm
JavaScript Decibel calculators   http://mcsquared.com/dbframe.htm
Crossover calculator  http://www.genesis-usa.net/calculator_crossover.html
Reverb calculator - computes RT60   http://www.wssh.net/~wattsup/audio
Volume per dB - Listening Demo   http://www.measure.demon.co.uk/Acoustics_Software/db_demo.html
Frequency - Octave Numbers & Toning Info  http://www.new-universe.com/tone/tone.html
Frequency - Octaves, Semitones   http://coral.lili.uni-bielefeld.de/Classes/Summer96/Acoustic/acoustic2/node49.html
Frequency - Demo, Play a Piano / Synthesizer / Oscilloscope  http://www.frontiernet.net/~imaging/play_a_piano.html
Frequency Charts - Piano Keyboard    http://ourworld.compuserve.com/homepages/kadima/notetbl.htm
Frequency Chart - Various Instruments & Voices  http://www.allchurchsound.com/index.html?ACS/edart/freq.html
Frequency Chart - Equal Temperament  http://linux46.ma.utexas.edu/users/miker/tuning/tuning.html
Frequency - Highest F to be heard by human  http://www.etl.go.jp/~acoustic/research/hf-e.html
Wavelength Calculator - Metric Units    http://ourworld.compuserve.com/homepages/kadima/wavemet.htm
Wavelength Calculator - English Units   http://ourworld.compuserve.com/homepages/kadima/waveeng.htm
Wavelength of Sound  - Calculator   http://mcsquared.com/wavelength.htm
What Is Pitch?   http://www.mibac.com/Pages/Theory/frames/nr/WhatIsPitch.html
Pitch  http://hyperphysics.phy-astr.gsu.edu/hbase/sound/pitch.html#c1
Tone Definition   http://www.encyclopedia.com/articles/12951.html
DTMF Chart  http://www.phones4less.co.uk/DTMF.htm
DTMF Chart  http://www.talking.co.uk/dtmf.htm
DTMF Chart  http://www.oreilly.com/reference/dictionary/terms/D/Dual_Tone_Multi-Frequency.htm
DTMF Chart  http://electric-words.com/dict/d/dtmf.html
DTMF Demo with Scope, Spectra  http://www.mathworks.com/products/demos/signaltlbx/phone/phone1.shtml  
BrainWave Generator   http://www.bwgen.com/presets.htm
Wolf Tone -  WWWBoard   http://maestronet.com/wwwboard/messages/22228.html
Voice Frequency Telegraphy - VFT   http://www.ominous-valve.com/vft.html   
Voice Frequency Compander - DSP based   http://www.wwc.edu/~frohro/qex/qex-art.html
Voice Transmission Rules - Wireless  http://www.timcoengr.com/voicefreq.htm
The Helium "Donald Duck" Effect   http://www.reefnet.on.ca/gearbag/wwwheliu.html
Equal Loudness Contours - Revising  http://www.etl.go.jp/etl/divisions/~acoustic/research/loudness.html
Equal Loudness Curves  http://hyperphysics.phy-astr.gsu.edu/hbase/sound/eqloud.html
Equal Loudness Fletcher - Munson Curves  http://www.allchurchsound.com/index.html?ACS/edart/fmelc.html
Equal Loudness Curves -  A, B, C Weighting Networks   http://www.sfu.ca/sonic-studio/Equal_Loudness_Contours.html
Equal Loudness Contours   http://fridge.arch.uwa.edu.au/squ1/noise/contours.html
Equal Loudness Curves    http://online.anu.edu.au/ITA/ACAT/drw/PPofM/loud/Loud3.html
Factors Influencing Equal Loudness Level Contours  http://www.physik.uni-oldenburg.de/docserver/diss/metadocs/2001078182328.html
Determination of Two Dimensional Equal Loudness Contours  http://www.nedo.go.jp/itd/grant-e/kokusai/00is1-e.htm
Equal Loudness - Phons and Sones   http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Phon - Definition, Curves, Formulas  http://www.sfu.ca/sonic-studio/Phon.html
Equal Temperament - Equal Tempered Intervals, Pythagorean   http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html  
Doppler Effect  http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Beats - Beat Frequency  http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
Sound Compression - Compressors, Manipulating Dynamic Range  http://www.digido.com/compression.html
Sound Compressor, Expander, Noise Gate, Softknee, Hardknee, Eigentone, Echo   http://www.sfu.ca/sca/Manuals/ZAAPf/e/expanders.html
Noise Spectrum Types, Noise Color - White, Pink, Red, Orange, Green, Blue, Purple, Grey, Brown, Black   http://www.ptpart.co.uk/colors.htm   ftp://svr-ftp.eng.cam.ac.uk/pub/comp.speech/info/Colors_of_noise_pseudo_FAQ.txt
Threshold of Hearing - Threshold of Audibility  http://www.sfu.ca/sonic-studio/Threshold_of_Hearing.html
Sound Components - Pitch, Timbre, Harmonics, Loudness, Rhythm, Attack, Sustain, Decay, Speed  http://www.filmsound.org/articles/ninecomponents/9components.htm
Sound Level Tables   http://www.planet-stuff.freeserve.co.uk/Standards/SoundLevels.htm
How Does the Decibel Level of a Sound Effect A Person's Hearing - dB SPL scale from 0 to 160  http://jajhs.kana.k12.wv.us/jahome/fro/projects/Hogue-Morgensternd.htm 
Interactive Demonstrations - Experiments in Sound, Hearing, Speech   http://www.speechandhearing.net/laboratory/demos.html
ABX, Probability of Experiment Being the Same as Random Guesses  http://ff123.net/abx/abx.html
Resistor Color Coder - for 1% resistors    http://www.schematica.com/Freeware/Freeware.htm
Resistor Color Code Interpreter - Uses check boxes instead of pulldown menus, also calculates the equivalent value of two resistors in parallel, for 5% resistors  http://ourworld.compuserve.com/homepages/Bill_Bowden/resistor.htm
Graphical Resistor Color Code - Uses pulldown menus and a realistic picture of a resistor - for 5% resistors   http://www.dannyg.com/javascript/res2/resistor.htm  
Voltage Divider Calculator Solves voltage, current, and power dissipation problems for two element resistive voltage dividers   http://ourworld.compuserve.com/homepages/Bill_Bowden/r2.htm
Resistance, Reactance & Impedance -  Solves passive series RLC networks, for reactance, impedance and phase angle. Polar Coordinates (Ohms, Degrees, Radians), Rectangular Coordinates (Ohms Real, Imaginary), Circuit Reactance (Ohms Inductive, Capacitive)   http://pr.erau.edu/~newmana/imped.html
Ohms Law - Voltage, Current, Resistance and Power. Enter any two unknowns and solve for the other two  http://ourworld.compuserve.com/homepages/Bill_Bowden/ohmslaw.htm
LED Series Resistance - Finds the series resistance for various series LED combinations and supply voltages   http://ourworld.compuserve.com/homepages/Bill_Bowden/led.htm
555 Timer - Frequency and Duty Cycle.  Calculates positive and negative time intervals for the 555 timer based on R and C values. Also contains descriptions and operation of each input and output of the timer and schematics for the two basic modes of operation (monostable or "one-shot" and astable or "rectangular wave oscillator"). Also contains a pictorial diagram of the timer connected as a LED flasher and a table of connections for the 556 timer (dual 555 timer).   http://ourworld.compuserve.com/homepages/Bill_Bowden/555.htm
RC Time - Solve R and C values for given values of time or instantaneous voltages.  http://ourworld.compuserve.com/homepages/Bill_Bowden/rc.htm
RC Time Constant - A percentage computed, no multipliers used   http://www.cvs1.uklinux.net/calculators
Tuned RLC Circuit   http://www.cvs1.uklinux.net/calculators
Energizer Battery Data - Capacity, Weight, Size, etc.  http://data.energizer.com/datasheets/frames.htm
Sound Waves and the Eardrum - Visual demo  http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/waves/edl.html
Properties of sound in air - Calculator, velocity per temperature, frequency, wavelength http://fridge.arch.uwa.edu.au/topics/acoustics/index_acoustics.html
Physics Lecture-Demonstration Facility - University of Maryland Physics Lecture, wide range of experiments described, often with useful info   http://www.physics.umd.edu/deptinfo/facilities/lecdem/demolst.htm
Acoustics and Vibration Animations - Animations visualize certain concepts concerning acoustics and vibration, By Dan Russell, Ph.D., Associate Professor of Applied Physics at Kettering University in Flint, MI  http://www.gmi.edu/~drussell/Demos.html
More animations and various sound demos & visual presentations  Acoustics Animations & Sound Interractive Demos
Power Cable Calculator  - Table http://www.partsexpress.com/resources/cablecalc.html
Online calculation of Earth's magnetic field   http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnth1.pl
Gregorian Calendar - Displays any month from Oct 1582 forward    http://ourworld.compuserve.com/homepages/Bill_Bowden/Calendar.htm
Damping Factor Calculator - CAT 5 DIY Interconnects and Speaker Cable CookBook        Damping Factor
ubject: 
Speaker cable gauge Calculator     http://www.webervst.com/gauge.htm