Narration 1 00:00:01 --> 00:00:06 Hello everyone. Welcome to this tutorial on Panel connections and Software interface. 2 00:00:07 --> 00:00:16 In this tutorial, we will learn about:

Various terminals on the Panel Accessory set and Software interface.

3 00:00:17 --> 00:00:32 We will also learn to demonstrate:

Ohm's law

Effective resistance in series combination

Effective resistance in parallel combination and

Show the circuit diagrams of our experiments.

4 00:00:33 --> 00:00:42 Here I am using,

ExpEYES version 3.1.0

Ubuntu Linux OS version 14.04

5 00:00:43 --> 00:00:54 To follow this tutorial, you should be familiar with ExpEYES Junior interface. If not, for relevant tutorials, please visit our website. 6 00:00:55 --> 00:00:59 Let's discuss about the utilities of ExpEYES Junior device. 7 00:01:00 --> 00:01:11 The device can be used to carry out experiments in:

Higher Secondary Undergraduates Electrical and Electronics Engineering courses.

8 00:01:12 --> 00:01:22 It can be used in fields such as- Electricity, Sound, Magnetism, Light, Diode, Transistors and others. 9 00:01:23 --> 00:01:34 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). 10 00:01:35 --> 00:01:41 Voltage measured at other input terminals is with reference to ground(GND) terminals. 11 00:01:42 --> 00:01:50 Input terminals A1 and A2 can measure voltage between -5V to +5V. 12 00:01:51 --> 00:01:58 On the left, IN1 and IN2 terminals can measure voltage between 0 to 5V. 13 00:01:59 --> 00:02:06 IN1 also measures capacitance up to 5000 pF(pico farads), with good accuracy. 14 00:02:07 --> 00:02:24 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). 15 00:02:25 --> 00:02:32 SINE delivers a constant frequency around 150 Hz, at an amplitude around 4 volts. 16 00:02:33 --> 00:02:44 SEN is mainly used for connective sensor elements like

photo-transistors, Light Dependent Resistors, Thermistors etc.

17 00:02:45 --> 00:02:51 It is a voltage measuring terminal with an internal 5.1K resistor connected to 5 volts. 18 00:02:52 --> 00:03:04 SQR1 and SQR2 terminals can generate

Square waves of “0” to “5V” with a frequency from 0.7 Hertz to 100 Kilo Hertz.

19 00:03:05 --> 00:03:12 OD1 produces a digital output as 0V or 5V, under Software control. 20 00:03:13 --> 00:03:17 MIC captures sound from an external sound source. 21 00:03:18 --> 00:03:21 CCS means Constant Current Source. 22 00:03:22 --> 00:03:30 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. 23 00:03:31 --> 00:03:41 Inverting amplifier is used to amplify external voltages. It may be used to amplify external condenser or mic output. 24 00:03:42 --> 00:03:46 Along with the device, some accessories are provided. 25 00:03:47 --> 00:03:55 Accessories list includes:

Two Piezo Electric Discs Two 3000 turns coils DC Motor

26 00:03:56 --> 00:04:04 Screwdriver

Set of four permanent magnets Four crocodile clips with wires Transistor

27 00:04:05 --> 00:04:11 Two silicon diodes

LDR & Thermistor Capacitors

28 00:04:12 --> 00:04:18 Four 5mm LEDS

Four wires Resistors.

29 00:04:19 --> 00:04:27 This is a graphical user interface (GUI) of ExpEYES Junior. GUI is known as Plot window. 30 00:04:28 --> 00:04:39 On the left side of the Plot window, we have input terminals: A1, A2, IN1, IN2, SEN, SQ1 and SQ2. 31 00:04:40 --> 00:04:47 ATR, WHI and other trigger sources are used to fix the waveform. 32 00:04:48 --> 00:04:55 We will discuss about ATR, WHI and other trigger sources in the upcoming tutorials. 33 00:04:56 --> 00:05:03 CH1, CH2, CH3, CH4 are plotting channels with sliders. 34 00:05:04 --> 00:05:10 Channel sliders on the right are used to move the waveform on the Plot Window. 35 00:05:11 --> 00:05:20 Click on A1 and drag to CH1. We can see the connection information in the box below. 36 00:05:21 --> 00:05:28 Click on A2 and drag to CH2. We can see the connection information as before. 37 00:05:29 --> 00:05:37 Drag channel CH2 to FIT. It shows the voltage and frequency of A2. 38 00:05:38 --> 00:05:43 Drag CH2 to NML. It removes the display shown by FIT. 39 00:05:44 --> 00:05:50 msec/div(milli second/division) represents time axis. 40 00:05:51 --> 00:05:55 Volt/div represents volt axis. 41 00:05:56 --> 00:05:59 Trig level is a trigger controller. 42 00:06:00 --> 00:06:06 Click on CH2 and drag to DEL. It removes CH2. 43 00:06:07 --> 00:06:14 Click on CH1 and drag to DEL. It disables the display of CH1. 44 00:06:15 --> 00:06:19 FTR generates Fourier spectrum of the wave. 45 00:06:20 --> 00:06:25 Under Setting Squarewaves, we have a number of input and check boxes. 46 00:06:26 --> 00:06:32 In this input box, we can change the frequency of the wave in Hertz. 47 00:06:33 --> 00:06:37 This is to change phase difference- dphi, in percentage(%). 48 00:06:38 --> 00:06:51 In Set PVS= input box, we can enter the desired voltage value between 0 to 5V. Press Enter to set the value. 49 00:06:52 --> 00:07:03 SQR1, SQR2 and BOTH check boxes are used to activate the frequency. Frequency can be changed using the slider. 50 00:07:04 --> 00:07:10 Set State check boxes are used to control OD1 and CCS. 51 00:07:11 --> 00:07:15 Measure C on IN1 button is used to measure Capacitance. 52 00:07:16 --> 00:07:20 Measure R on SEN button is used to measure Resistance. 53 00:07:21 --> 00:07:30 Below the buttons, we have a command window to type Python code. We will discuss about Python code in upcoming tutorials. 54 00:07:31 --> 00:07:36 Save Traces to button to save traces as ".txt" files. 55 00:07:37 --> 00:07:44 We will discuss about LOOP check box, SCAN and XMG buttons in later tutorials. 56 00:07:45 --> 00:07:52 EXPERIMENTS button displays list of experiments. Quit button is used to close the window. 57 00:07:53 --> 00:07:58 Now, I will demonstrate Ohm's law using the device and its interface. 58 00:07:59 --> 00:08:08 In this experiment, we will show the dependency of voltage across a resistor and verify Ohm’s law. 59 00:08:09 --> 00:08:11 The device is connected to the system. 60 00:08:12 --> 00:08:24 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). 61 00:08:25 --> 00:08:29 This is the circuit diagram for the connection. 62 00:08:30 --> 00:08:31 Open the software interface. 63 00:08:32 --> 00:08:36 In the Plot window, click on IN1 to measure the voltage. 64 00:08:37 --> 00:09:00 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.

65 00:09:01 --> 00:09:09 As an assignment-

Change PVS values from 0 to 5 volts and check the corresponding IN1 values.

66 00:09:10 --> 00:09:15 Let us perform an experiment to check the effective resistance in series combination. 67 00:09:16 --> 00:09:22 In this experiment, we will show the voltage when resistors are connected in series. 68 00:09:23 --> 00:09:32 In this experiment-

IN1 is connected to CCS, CCS is connected to ground through a resistor.

69 00:09:33 --> 00:09:41 On the Plot window, select the CCS check box. Click on IN1 to show the voltage. 70 00:09:42 --> 00:09:44 This is the circuit diagram for the connection. 71 00:09:45 --> 00:09:53 When 1 KΩ (kilo ohms) resistor is connected to CCS and GND, measured voltage is 0.979V. 72 00:09:54 --> 00:10:01 Likewise, for 560 Ω(ohms) resistance, measured voltage is 0.543V. 73 00:10:02 --> 00:10:13 For a series combination of 1 KΩ (kilo ohms) and 560Ω(ohms) resistances, measured voltage is 1.524V'. 74 00:10:14 --> 00:10:20 Let us perform an experiment to check the effective resistance in parallel combination. 75 00:10:21 --> 00:10:27 In this experiment, we will show the voltage when resistors are connected in parallel. 76 00:10:28 --> 00:10:37 In this experiment, IN1 is connected to CCS. CCS is connected to ground(GND) through a resistor. 77 00:10:38 --> 00:10:39 This is the circuit diagram for the connection. 78 00:10:40 --> 00:10:48 On the Plot window, select the CCS check box. Click on IN1 to show the voltage. 79 00:10:49 --> 00:11:00 The experiment is first carried out with 1000Ω(ohms) resistor then with parallel combination of two 1000 Ω(ohms) resistors. 80 00:11:01 --> 00:11:10 This is the circuit diagram for 1000 Ω(ohm) resistance in parallel combination. The measured value of IN1 is 0.952V. 81 00:11:11 --> 00:11:24 This is the circuit diagram for parallel combination of two 1000 Ω(ohm) resistors. The measured value of IN1 is 0.474V. 82 00:11:25 --> 00:11:37 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. 83 00:11:38 --> 00:11:47 This is the circuit diagram for 2.2K Ω(kilo ohms), resistance. The measured value of IN1 is 2.132V 84 00:11:48 --> 00:12:02 This is the circuit diagram for parallel combination of two 2.2KΩ(kilo ohms) resistance. The measured value of IN1 is 1.063V. 85 00:12:03 --> 00:12:04 Let's summarize. 86 00:12:05 --> 00:12:13 In this tutorial, we have learnt:

Various terminals on the panel Accessory set and Software interface.

87 00:12:14 --> 00:12:28 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.

88 00:12:29 --> 00:12:36 As an assignment,

Measure the effective resistance using a combination of series and parallel resistors.

89 00:12:37 --> 00:12:46 This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it. 90 00:12:47 --> 00:12:54 We conduct workshops using Spoken Tutorials and give certificates. Please contact us. 91 00:12:55 --> 00:13:01 The Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. 92 00:13:02 --> 00:13:07 This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi. This is Sakina Sidhwa.

Thank you for joining.