|00:01||Hello everyone. Welcome to this tutorial on Panel connections and Software interface.|
|00:07||In this tutorial, we will learn about:
Various terminals on the Panel Accessory set and Software interface.
|00:17||We will also learn to demonstrate:
Effective resistance in series combination
Effective resistance in parallel combination and
Show the circuit diagrams of our experiments.
|00:33||Here I am using,
ExpEYES version 3.1.0
Ubuntu Linux OS version 14.04
|00:43||To follow this tutorial, you should be familiar with ExpEYES Junior interface. If not, for relevant tutorials, please visit our website.|
|00:55||Let's discuss about the utilities of ExpEYES Junior device.|
|01:00||The device can be used to carry out experiments in:
Higher Secondary Undergraduates Electrical and Electronics Engineering courses.
|01:12||It can be used in fields such as- Electricity, Sound, Magnetism, Light, Diode, Transistors and others.|
|01:23||Let's begin with terminals on the top of Panel. Panel has four ground (GND) terminals. At these terminals, the voltage is zero volt (0 V).|
|01:35||Voltage measured at other input terminals is with reference to ground(GND) terminals.|
|01:42||Input terminals A1 and A2 can measure voltage between -5V to +5V.|
|01:51||On the left, IN1 and IN2 terminals can measure voltage between 0 to 5V.|
|01:59||IN1 also measures capacitance up to 5000 pF(pico farads), with good accuracy.|
|02:07||PVS is Programmable voltage source. It is used to deliver voltages in 0-5 Volts range with a minimum step of 1.25 mV (milli volts) and can deliver up to 5 mA (milli amps).|
|02:25||SINE delivers a constant frequency around 150 Hz, at an amplitude around 4 volts.|
|02:33||SEN is mainly used for connective sensor elements like
photo-transistors, Light Dependent Resistors, Thermistors etc.
|02:45||It is a voltage measuring terminal with an internal 5.1K resistor connected to 5 volts.|
|02:52||SQR1 and SQR2 terminals can generate
Square waves of “0” to “5V” with a frequency from 0.7 Hertz to 100 Kilo Hertz.
|03:05||OD1 produces a digital output as 0V or 5V, under Software control.|
|03:13||MIC captures sound from an external sound source.|
|03:18||CCS means Constant Current Source.|
|03:22||It gives 1 mA(one milli Amp) current with a load resistor of 3 kΩ(kilo ohms), since voltage should be kept below 4 volts.|
|03:31||Inverting amplifier is used to amplify external voltages. It may be used to amplify external condenser or mic output.|
|03:42||Along with the device, some accessories are provided.|
|03:47||Accessories list includes:
Two Piezo Electric Discs Two 3000 turns coils DC Motor
Set of four permanent magnets Four crocodile clips with wires Transistor
|04:05|| Two silicon diodes
LDR & Thermistor Capacitors
|04:12|| Four 5mm LEDS
Four wires Resistors.
|04:19||This is a graphical user interface (GUI) of ExpEYES Junior. GUI is known as Plot window.|
|04:28||On the left side of the Plot window, we have input terminals: A1, A2, IN1, IN2, SEN, SQ1 and SQ2.|
|04:40||ATR, WHI and other trigger sources are used to fix the waveform.|
|04:48||We will discuss about ATR, WHI and other trigger sources in the upcoming tutorials.|
|04:56||CH1, CH2, CH3, CH4 are plotting channels with sliders.|
|05:04||Channel sliders on the right are used to move the waveform on the Plot Window.|
|05:11||Click on A1 and drag to CH1. We can see the connection information in the box below.|
|05:21||Click on A2 and drag to CH2. We can see the connection information as before.|
|05:29||Drag channel CH2 to FIT. It shows the voltage and frequency of A2.|
|05:38||Drag CH2 to NML. It removes the display shown by FIT.|
|05:44||msec/div(milli second/division) represents time axis.|
|05:51||Volt/div represents volt axis.|
|05:56||Trig level is a trigger controller.|
|06:00||Click on CH2 and drag to DEL. It removes CH2.|
|06:07||Click on CH1 and drag to DEL. It disables the display of CH1.|
|06:15||FTR generates Fourier spectrum of the wave.|
|06:20||Under Setting Squarewaves, we have a number of input and check boxes.|
|06:26||In this input box, we can change the frequency of the wave in Hertz.|
|06:33||This is to change phase difference- dphi, in percentage(%).|
|06:38||In Set PVS= input box, we can enter the desired voltage value between 0 to 5V. Press Enter to set the value.|
|06:52||SQR1, SQR2 and BOTH check boxes are used to activate the frequency. Frequency can be changed using the slider.|
|07:04||Set State check boxes are used to control OD1 and CCS.|
|07:11||Measure C on IN1 button is used to measure Capacitance.|
|07:16||Measure R on SEN button is used to measure Resistance.|
|07:21||Below the buttons, we have a command window to type Python code. We will discuss about Python code in upcoming tutorials.|
|07:31||Save Traces to button to save traces as ".txt" files.|
|07:37||We will discuss about LOOP check box, SCAN and XMG buttons in later tutorials.|
|07:45||EXPERIMENTS button displays list of experiments. Quit button is used to close the window.|
|07:53||Now, I will demonstrate Ohm's law using the device and its interface.|
|07:59||In this experiment, we will show the dependency of voltage across a resistor and verify Ohm’s law.|
|08:09||The device is connected to the system.|
|08:12||In this experiment, PVS is connected to IN1 through 2.2 KΩ (kilo ohms) resistance. IN1 is connected to ground (GND) through 1KΩ (kilo ohms).|
|08:25||This is the circuit diagram for the connection.|
|08:30||Open the software interface.|
|08:32||In the Plot window, click on IN1 to measure the voltage.|
|08:37||For PVS=1 Volt, the corresponding value of IN1 is 0.309 Volt.
For PVS=2V, IN1 value is 0.619V. For PVS=3V, IN1 value is 0.928V.
|09:01||As an assignment-
Change PVS values from 0 to 5 volts and check the corresponding IN1 values.
|09:10||Let us perform an experiment to check the effective resistance in series combination.|
|09:16||In this experiment, we will show the voltage when resistors are connected in series.|
|09:23||In this experiment-
IN1 is connected to CCS, CCS is connected to ground through a resistor.
|09:33||On the Plot window, select the CCS check box. Click on IN1 to show the voltage.|
|09:42||This is the circuit diagram for the connection.|
|09:45||When 1 KΩ (kilo ohms) resistor is connected to CCS and GND, measured voltage is 0.979V.|
|09:54||Likewise, for 560 Ω(ohms) resistance, measured voltage is 0.543V.|
|10:02||For a series combination of 1 KΩ (kilo ohms) and 560Ω(ohms) resistances, measured voltage is 1.524V'.|
|10:14||Let us perform an experiment to check the effective resistance in parallel combination.|
|10:21||In this experiment, we will show the voltage when resistors are connected in parallel.|
|10:28||In this experiment, IN1 is connected to CCS. CCS is connected to ground(GND) through a resistor.|
|10:38||This is the circuit diagram for the connection.|
|10:40||On the Plot window, select the CCS check box. Click on IN1 to show the voltage.|
|10:49||The experiment is first carried out with 1000Ω(ohms) resistor then with parallel combination of two 1000 Ω(ohms) resistors.|
|11:01||This is the circuit diagram for 1000 Ω(ohm) resistance in parallel combination. The measured value of IN1 is 0.952V.|
|11:11||This is the circuit diagram for parallel combination of two 1000 Ω(ohm) resistors. The measured value of IN1 is 0.474V.|
|11:25||Again the experiment is carried out- first with 2.2K Ω(kilo ohms) resistor, then with parallel combination of two 2.2 KΩ(kilo ohms) resistors.|
|11:38||This is the circuit diagram for 2.2K Ω(kilo ohms), resistance. The measured value of IN1 is 2.132V|
|11:48||This is the circuit diagram for parallel combination of two 2.2KΩ(kilo ohms) resistance. The measured value of IN1 is 1.063V.|
|12:05||In this tutorial, we have learnt:
Various terminals on the panel Accessory set and Software interface.
|12:14||We have also learnt to demonstrate:
Ohm's law Effective resistance in series Effective resistance in parallel and Show the circuit diagrams of above experiments.
|12:29||As an assignment,
Measure the effective resistance using a combination of series and parallel resistors.
|12:37||This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it.|
|12:47||We conduct workshops using Spoken Tutorials and give certificates. Please contact us.|
|12:55||The Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.|
|13:02||This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi. This is Sakina Sidhwa.
Thank you for joining.