Online Labs

Experience and Use virtual labs built by the Department of Electronics and Electrical Engineering Obafemi Awolowo University


Physics Labs


Latent Heat of Fusion Experiment

Latent heat of fusion is the "hidden" heat which is absorbed by a solid as it changes its state from solid to liquid without an increase in its temperature. It is the heat required to melt a solid at its melting point without increasing the temperature. In this experiment, the user will explore this concept and determine the latent heat of fusion of ice cubes.

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Ohm's Law Experiment

Ohm's law defines the relationship between the potential difference across an item, the current flowing through that item and the resistance of the item. This experiment demonstrates this relationship. The user will also get to investigate the series and parallel relationship of resistors in this experiment. Go to Lab

Specific Heat Capacity Experiment

The specific heat capacity of an item is the amount of energy required to raise a unit mass of that item by one Kelvin (or degree celsius). Hence, if an items specific heat (or specific heat capacity) is 1J/kg/K, then this means that it takes one Joule of energy to raise one the temperature of one kilogram of the item by one Kelvin. In this experiment, the user will investigate this concept and find the specific heat of some given masses.

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Chemistry Labs


Redox Reaction Experiment

Redox stands for reduction and oxidation. This experiment makes use of the process of titration to reduce a potassium permanganate solution.

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Acid-Base Titration Experiment

Acid-Base titration is a procedure used to determine the concentration of an acid by titrating it with a base of known concentration or vice versa. In this experiment, the student will be provided the concentration of the base by his teacher and then upon titration will calculate the concentration of the acid chosen based on the volume of acid used and the molarity of the base solution as given by the teacher.

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Sodium Carbonate Experiment

This experiment determines the number of molecules of water of crystalization in a hydrated solution of sodium carbonate. Titration is the procedure used.

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Double Indicator Experiment

In a double indicator experiment, we attempt to determine the proportions of a mixture of two different solutions which have different titration end points. This experiment makes used of titration to determine the proportions of sodium carbornate and sodium hydroxide in a mixture of these.

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CONTROL ENGINEERING LABORATORY


Ball and Beam Experiment

The Ball and Beam system is a Control Engineering problem where the user is required to balance a ball on a beam. It is one of the most common laboratory-scale displacement control systems. The objective is to maintain the position of a ball on an inclined beam by tilting the beam back and forth. In this experiment, the user is required to design a requisite controller to meet this control objective.

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ADOBE FLASH EXPERIMENTS

CHEMISTRY EXPERIMENTS


Recrystalization and Melting Point Experiment

This experiment demonstrates the use of recrystalization to purify a solid organic compound. The impure organic compound is dissolved in a solute which dissolves the organic compound but does not dissolve the impurities. After filtering off the impurities, the pure organic compound is recrystalized from the solution. The experiment then goes further to find the melting poing of the organic compound.

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Chloride Measurement Experiment

This experiment is used to determine the concentration of Chloride ions in a potassium chromate solution. Silver nitrate is used as the titrant and the titration process is used to determine the chloride concentration.

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Conductivity Measurement Experiment

Different liquids conduct electricity to different degrees. In this experiment, the student is to measure the conductivities of different water samples taken from different wells and rivers. the presence of heavy metals in run off water which flows into rivers often affects the conductivities of river waters.

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LabVIEW EXPERIMENTS

The virtual labs below were previously hosted on our server using LabVIEW remote panels but are currently not available as online virtual laboratories while we tinker about with our LabVIEW installation. Hence, the following experiments require you to download the given LabVIEW files and run them locally on your computer. Each archive below contains a LabVIEW vi and a Microsoft Word File. The LabVIEW vi is the virtual experiment which you will run on your computer. Hence, to run these virtual experiments, you will need to have LabVIEW installed on your computer. Some of the experiments can be run with LabVIEW 8.6 or later. One of them however (The Thevenin and Maximum Power Theorem Experiment) requires LabVIEW 2011 or later.

BASIC ELECTRONICS


Amplitude Modulation

Requires LabVIEW 8.6 or later

One modulation technique is Amplitude Modulation. The message signal is used to modulate the amplitude of a carrier signal. In this experiment, you will use a message signal to modulate a carrier signal of your choice. Experiment to see why the carrier's frequency must be much higher than the frequency of the message signal.

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Amplitude Shift Keying

Requires LabVIEW 8.6 or later

Amplitude Shift Keying (ASK) is an amplitude modulation technique used for digital message signals. In this experiment, you will investigate Amplitude Shift Keying and see how the modulated signal is recovered.

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Frequency Shift Keying

Requires LabVIEW 8.6 or later

Frequency Shift Keying is a form of Frequency Modulation technique which is used for digital message signals. In this experiment, you will experiment with Frequency Shift Keying and experiment with how to do this form of modulation and how to recover the modulated signal.

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Time Division Multipliexing

LabVIEW Version: Requires LabVIEW 8.6 or later

Time Division Multipliexing is a technique used to share a particular resource between two signals. For example, with TDM, a communications channel can be shared between two sources so that each source is allocated time slots for transmitting their messages. In this experiment, you will investigate the technique of Time Division Multipliexing.

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Ohm's Law

LabVIEW Version: Requires LabVIEW 8.6 or later

Ohm's law is one of the most fundamental laws in Electronic and Electrical Engineering. It defines the relationship between resistance, potential difference and current. In this experiment, you will investigate the relationship between these three variables (voltage, resistance and current).

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Series Resistance Circuits

LabVIEW Version: Requires LabVIEW 8.6 or later

When resistors are placed in series they behave like a single resistor which has its own resistance. This experiment illustrates this and you will investigate the relationship between the equivalent resistance and the resistances of the individual resistors connected in series.

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Series-Parallel Circuits

LabVIEW Version: Requires LabVIEW 8.6 or later

Resistors connected in series behave differently from resistors connected in parallel. In this experiment, you will explore this concept. You will explore the relationship between resistors which are connected in series and resistors which are connected in parallel. You will then also investigate circuits which comprise both series and parallel connections of resistors.

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Superposition Theory

LabVIEW Version: Requires LabVIEW 8.6 or later

A linear system is one which obeys the law of superposition. The law of superposition states, in a nutshell, that summing up inputs results in the summation of the indivual responses. In this experiment, this theory is investigated.

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Thevenin and Maximum Power Theorem

Requires LabVIEW 2011 or later

Thevenin's Theorem presents a method whereby we can represent a complex resistive circuit by a single voltage source and a single resistor. The maximum power theorem, on the other hand, defines the maximum power that can be transferred to a load by a circuit. In this experiment the user will validate Thevenin's theorem as well as demonstrate the condition for the maximum transfer of power to a load.

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Counters

LabVIEW Version: Requires LabVIEW 8.6 or later

Synchronous counters make use of flip flops that are all clocked by the same clock (hence the name synchronous). This experiment demonstrates the counting sequence of a 3-bit synchronous counter. The user serves as the clock for the counter.

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CHEMISTRY


Titration

Requires LabVIEW 8.6 or later

Titration is a procedure in Chemistry whereby an acid it steadily and gradually added to a base until the solution formed has a neutral pH. If the concentration of the base is known and the concentration of the acid is unknown, then the concentration of the acid can be determined by titration and vice versa. In this experiment, you are supplied basic solutions of known concentrations and your task is to determine the concentration of the acid by means of titration.

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Address

R-Lab Development Group,
Department of Electronics and Electrical Engineering,
Obafemi Awolowo University, Ile-Ife, Nigeria

Email

olawale.akinwale@oauife.edu.ng

Obafemi Awolowo University Ile-ife