led characteristics lab manual pdf
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The experiments in this lab manual are designed for low voltage which minimizes the electrical shock hazard, but it only takes several milliamperes of current to cause a harmful electrical shock. H��V�n�8}�W�V4o"E�(����Y���I\Y�����-#��w��dG���0D�䜹�r��jq�5�ݻɇ��)�����%��Ϥ��ʒk�6��ɵvܐ]��K6�e��gA�,,�] ��.��0P���,4Q��0-@��lr�d��>eW@���&{Sdg���$��ɾ�d���X�g�5��,I��aT�rP��"gI��n���S�Q�r�5%�0E��}���Jk�@��g���? Physics Page 3 of 8 S . Optical Fiber Communication Experiment Kit 2. It will then increase It consists of a PN Junction Diode and when voltage is applied to the LED, electrons and holes recombine in the PN Junction and release energy in the form of light (Photons). This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. /Length 302 To find the Zener Break down voltage in reverse biased condition. This list is not all inclusive; however, it does contain the most common symbols and their units. All Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf. %%EOF Zener diode is used for voltage regulation purpose. �_~,����֦��/�:�dQ���&+�����iN��P��i�+�8�7��� ��Rc���hG�smxM?p�_��S�u;8� The visible lights that an LED emits are usually orange, red, yellow, or green. ZENER DIODE CHARACTERISTICS AIM: 1. With each of these devices, the current increased as the light increased The photodiode was measured by using the base and collector leads of the phototransistor The phototransistor measurements were made between the emitter and collector •If, we just reverse the diode to measure the I-V characteristics, the sudden change might destroy the diode. /Filter /FlateDecode This Laboratory Manual for Semiconductor Devices: Theory and Application, by James M. Fiore is copyrighted under the terms of a Creative Commons license: This work is freely redistributable for non-commercial use, share-alike with attribution The LED is a special type of diode and they have similar electrical characteristics of a PN junction diode. Light Emitting Diode (LED) Schematic symbol and I-V Characteristics Curves showing the different colours available. >> %���� Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. 49 0 obj << We will then plot it to get the depen-dence. The device is capable of emitting a fairly narrow bandwidth of visible or invisible light when its internal diode junction attains a forward electric current or voltage. 1. 2 Preface This laboratory book in Electronics I has been revised in order to be up to date with curriculum changes, laboratory equipment upgrading, and the latest circuit simulation software. The effect is a form of electroluminescence where incoherent and narrow-spectrum light is emitted from the p … Basics of LED (Light Emitting Diode) As mentioned in the introduction, an LED is a semiconductor light source. endstream h�bbd``b`�$�Xm@��0���@�%�j ����:�\ ���\Q >�P��@�R���������H�a�g� ZD; Physics LAB SUBJECT CODE: BT 2001 NAME OF DEPARTMENT: Engg. This portion of an NPN BJT is just like a p-n junction. 10. /Length 538 characteristics, relative to other series within the same logic family. However LED luminaires with very bright light points, which can be perceived indi-vidually, are crucial. Do not make circuit changes or perform any wiring when power is on. LIGHT EMITTING DIODE CHARACTERISTICS (SAMPLE LAB WRITEUP) John A. McNeill ECE Box 000 March 17, 2004 ABSTRACT This lab investigates the V-I characteristic of a light-emitting diode (LED). 3: Forward I–V characteristics of the 340 nm LED measured at 5-300 K [2] As Fig. However, a slight increase in the temperature results in a shift in the curve characteristic to the left as can be seen in Fig. h�b```��,��@����(��!E��#~���d�n\g㌖z��������Hq�Հ�2�Hi0>3�3� ;H�P�૰ر�i�W���00��pV���*��T���h�f`�d��� AVO meter 5. �H��QPQL[�(�����.��N��m���0���{h��l���0t*l���;���C6���?����.���fU.������u��t}�x6��f��f���OZW���s�}|i~�5eSe���[?��NO��v^� �0ٴ|��Z<>5���X�]'2����|��ڲ�uݜ��_�N�v������n�jˮ����zU�����rQat������z�py��gͦj�Oq�������yvє��|R?.+�g��Z�ʸ4�2q,��Y<7�M�[X��֯7��=�c=_?,������E�}��l��S��G���3�)��#������ �sg�Kс��i{g�c�� ���!S��?>��QX�;� �y��%��IoY�c�Π��9�B@�Y_ƺ�)]��b� �H�4=�EaD�O�\����dLD�W��x������~d�n�h�Ɩ�f=!O�xC��Z/N��b������Z�_=fɔ���jℤsB�3h�9s�C r� endstream endobj startxref e��x}�7>���ο�v��U��\.5�֑\r�C/~t%G_�j�^����^�\�%aMg,7t7,�Ynah�C�f�_��`�{V�i�&븶�|�Ip�rc��.��0�r�].��E�:�n@���;�ЀƖ����/�������]1�m�O� ֙��k�P�������a w�� PHYSICS LAB MANUAL SUBJECT CODE:- 06 PHYL 17 1. In 1962, Nick Holonyak has come up with an idea of light emitting diode, and he was working for the general electric company. @U`k��8 :Q�CY��}�@����w��3���!.48vA�RM�>?��$b}���W���}���B�dӴ��@�F{�����e!�1=�f��MMK���t�:#?f ���>�������ҏ��˼�� �"-� 3.2 Junction temperature and LED emission The emission intensity of LEDs … 2 ... is a list, by letter symbol, of the major electrical characteristics for the rectifier and signal diodes. of ECE CREC 9 2. This threshold voltage concept comes from the fact that a diode is just a pn junction. 3. BACKGROUND INFORMATION 3.1 CHART OF SYMBOLS Here is a chart of symbols used in this lab manual. %PDF-1.5 Characteristics of Light Emitting Diode (LED) Aim of experiment In this experiment, we study and measure the P-I characteristics of Light Emitting Diode (LED), which used in optical fiber communication as a light source. THE CURRENT-VOLTAGE CHARACTERISTICS OF AN LED AND A MEASUREMENT OF PLANCK’S CONSTANT Physics 258/259 I. Electronic Measurement & Instrumentation (EE-323-F) LAB MANUAL(V SEM ECE) Page 4 VERTICAL AMPLIFIER:-This is a wide band amplifier used to amplify signal in the vertical section of the signal. Optical fiber power meter 3. All Lab Manuals Pdf Files JNTU -JNTU Lab Manuals Pdf to download here are Listed Below please check it.Here you can find the JNTU all Lab Manuals related to Engineering departments like ECE, CSE, MECH, EEE and CIVIL branches according to … Part 3: Identify the Controls and Variables ... characteristics, behaviors, and habitats of the creatures can be used in … 346 0 obj <>stream Characteristics of Zener Diode Aim:-To plot the characteristic curves for the zener diode and hence to determine knee and breakdown voltage. NAME OF LABORATORY: Engg. , the current level, encapsulation and other factors. That will allow a flow of huge current which might destroy the diode. Wires 6. 2. xڅ��N1E�|��M����D@B �f������H�{�)�!Qyl�̽sG�7&��D�s^瓋[���k&�J����,_�y�6u�7SN�eOu8T� �q�������ƎW�"�ڀ7f��倆�i�lönF*����4�')GwU,�}��6:+ߋX�mCӆ���#��@�c�������@2��T@������d-���]�U��"[/G�tNr"Pi.-xɫ�C�,H�)��T�p�F���X�MX����. Oscilloscope 4. Hence the LED allows the flow of current in the forward direction and blocks the current in the reverse direction. A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. LEDs are available in different colors. LAB MANUAL EC6712- OPTICAL AND MICROWAVE LABORATORY . This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. p�I �� U� ` �T"D 12 Characteristics of BJT in Common Emitter Configuration 26 ... and procedures in the Lab Manual before starting the experiments. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. Experiment 2 V-I characteristics of zener and LED diode 10 V-I CHARACTERISTICS OF Zener and LED DIODE AIM: AIM: To obtain V-I characteristics of Zener diode and characteristics of light emitting diode (LED) . The intention of the manual is to provide lab users and MSU students with a complete description of the The LED occupies the s… 1N4148 diode should have the same threshold voltage (around 0.6 volts) whereas an LED may have a different threshold voltage. common emitter configuration is the same as the I-V characteristic of a diode. Light Emitting Diode (LED) A Light Emitting Diode (LED) is a semiconductor diode that emits light when an electric current is applied in forward direction of the device as in simple LED circuit. /Filter /FlateDecode Consequently, the I B and V BE relationship in the . ANNA UNIVERSITY: CHENNAI SYLLABUS R - 2013 L T P C 0 0 3 2 LIST OF EXPERIMENTS ... DC Characteristics of LED 2 Mode Characteristics of Fibers 3 Measurement of Connector And Bending Losses 4.a) Setting Up … !M�HJ�j�J�� ���?��/�.�� stream Lab X: I-V Characteristics of Metal-Oxide-Semiconductor Field Effect Transisitors (MOSFETs) – Page 2 3. Therefore, over stream Don™t feel bad if you haven™t studied pn junctions before; it is not required for this lab. To observe and draw the V-I characteristics and Regulation characteristics of a Zener diode. 2 shows, voltage control of LEDs might be possible. TIME BASE: – It is used to generate sawtooth voltage which it is applied to LAB MANUAL 2009 Author: Todd Kaiser Montana State University Solar Cell LAB MANUAL July 2009 This manual was designed for use with the Montana Microfabrication Facility at Montana State University. The symbol of LED is similar to the normal p-n junction diode except that it contains arrows pointing away from the diode indicating that light is being emitted by the diode. Quality characteristics of lighting The evaluation of glare The glare of all luminaires that are in the room regularly can be evaluated with the UGR method, as specified in the standard EN 12464-1 “Lighting of indoor workplaces”. Safety must always be first. Do your wiring, setup, and a careful circuit checkout before applying power. Thorlabs provides a range of unmounted, mounted, collimated, and fiber-pigtailed LEDs that emit in the 245 - 4600 nm spectral range. LAB MANUAL ELECTRONIC DEVICES & CIRCUITS LAB Dept. �/�Z��Eֶ���L�CZ:A���B��I{r��)24L�t�{��& ��Zʄ}~T�˔dݜ�>�����7����M�����0y�;Hޣ��e誼�'"���e��27%'����[޻T�"ċ�c��dq�������&�� ��@�b�x���S .�'C�*�O�u���E.�;�\\�'.�;čH�!n� .��\�Ii�Wi�.��"G44\h|�RK>�����o��G��c*>��y;f���6�-ջ��[�#o�M�}��}�;�,�%���}�vQ�}Qu?��k�i!QƆ�kLe^��E%�T"RJ��y��x��y�u�;2�|�ۈM�Q��q\��E������ �]Nu�!�KG��LJ�Hm�h�7�����oO�RǾ!��N����y�}Y�[*�{�f:�[��ކ��JmZ��t^�J���� U2ʁH�6�b�T;�b!�}*�f�X�:�_��P�P����}ƨ��m[8BUU�ۣ�ȯ-E� �nr�xCΊ�R �1X|ӪV�;�Vp�S����%}D�_D�I�j�:�z�"��MJ8$uR�8�$T�X��G*稪�kK��C���? Our High-Power LEDs for Microscopy, Collimated LEDs, Multi-Channel LED Sources, and Illumination Kits are all designed for microscopy applications. endobj the phototransistor characteristics. Figure 1. 313 0 obj <> endobj This experiment led to the development of what major medical advancement…? •The diode should not be short-circuited. endstream endobj 314 0 obj <>/Metadata 22 0 R/Outlines 38 0 R/PageLayout/OneColumn/Pages 311 0 R/StructTreeRoot 51 0 R/Type/Catalog>> endobj 315 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 316 0 obj <>stream Around 1900 Planck developed the concept of energy quantization to explain the spectral distribution of characteristics are obtained between the input current I B and input voltage V BE at constant output voltage V CE. Chart of the symbols used in this lab. x��UMs�0��W�(�j�e�X e����V8�XIL;c9m���V��GI�N���}zo���Eg����fW7�!H)P�D@�Z���Q��;��*[6.��ݞ�C&�TJ�fR3E��!�8� The light intensity is governed by a variety of factors including the LED chip itself (including the design, individual wafer, the materials, etc.) %PDF-1.5 %���� INTRODUCTION Max Planck (1858-1947) was an early pioneer in the field of quantum physics. The Light emitting diode is a two-lead semiconductor light source. Introduction: The Zener diode is designed to operate in reverse breakdown region. endstream endobj 317 0 obj <>stream Below are several general safety rules for all digital experiments and activities in the laboratory. 0 this lab manual a method based on the shift of the peak emission wavelength with the temperature and a method based on the shift of the diode forward voltage with temperature are discussed. gk���P-���l��Aat3�u0� �h- 4�ݻW@P�?AT��I�r>*�5�}M��R�(A�P���K��ݗ���JF�pc�;[�f_�1O&Q,)�?��q�k:��p'�L�� �"v[8�&�Г��7��;5��ecF���2����L� �E�B˪~4u6զ1��7D In the first part of lab, there are tasks where we have to practically understand the characteristics of semiconductor diode. The LED specification for light intensity is important. LABORATORY MANUAL DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING Revised Summer 2018. Connecting electrodes are following: positive p-side is anode, and negative n-side is cathode. EXPERIMENT 7:Observation of characteristics of a Zener diode Debangshu Mukherjee BS.c Physics,1st Year Chennai Mathematical Institute 7.11.2008 1 Aim of experiment In this experiment, we try to observe the relation between the voltage and corressponding current generated. Semiconductor diode Objectives This laboratory work consists of two parts. Fig. DELAY LINE: – It is used to delay signal for sometime in the vertical section. b�tL��&:���c+�e�A5U�%�,��Ƙ\���#�� ���qhv�X֨"�ڰ��@��֫�F�;j�z��>6�S��[�J �h�Jq8��K��"��%���a���&=G�пՓ�:�#���L�. 70 0 obj << Basic Electronics Lab Manual School of Physical Sciences National Institute of Science Education and Research Bhubaneswar . Table 1. For example, in the TTL logic family, there are several logic series: the 74 standard, 74L low-power, 74H high-speed, 74S standard Schottky, 74LS low-power Schottky series, and 74ALS advanced low-power Schottky series. LED light intensity value, Iv. h�Ԙ�n�6�_���E*�L� ��i4� ��\������֢��w�"��l9m��I)XΤ��P(���a�H(�^h(��r���ZU�D�C�r�`J b`8B��� �a�1��i��vm~qئ R|�k�Z. Light emitting diode (LED) symbol. >> N 4 8 9 REVERSE BIASING:- When the negative terminal of the battery is connected to the P type region and positive terminal connected to N type region. •Current must not pass through it for a very long time. Apparatus 1. CIRCUITS LABORATORY EXPERIMENT 6 TRANSISTOR CHARACTERISTICS 6.1 ABSTRACT In this experiment, the output I-V characteristic curves, the small-signal low frequency equivalent circuit parameters, and the switching times are determined for one of the commonly used transistors: a bipolar junction transistor. 331 0 obj <>/Filter/FlateDecode/ID[<951FF674811BFA43920D0E7D1B4A0DC5>]/Index[313 34]/Info 312 0 R/Length 91/Prev 169991/Root 314 0 R/Size 347/Type/XRef/W[1 2 1]>>stream 3. ��X@8�"�'�H6��.%J�x`�`8+*��}������ViX_����^!iO���GqՉ���#�W/�5�/��!l%]�"y��s$�G^���E���^��T>���2?��ńy��â���A�x���*LK0S�"�-��4�����J݇� Forward I–V characteristics of BJT in common emitter configuration is the same threshold voltage comes..., relative to other series within the same threshold voltage and activities in field... Pn junctions before ; it is not required for this Lab Manual before starting the experiments voltage concept comes the. 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Field Effect Transisitors ( MOSFETs ) – Page 2 3 volts ) whereas an LED emits usually! Junction diode xpand the student ’ S CONSTANT physics 258/259 I threshold voltage ( around 0.6 ). And their units & COMPUTER ENGINEERING Revised Summer 2018 voltage V BE relationship in the first of... Measurement of PLANCK ’ S knowledge and as well as his laboratory skills on investigation! Metal-Oxide-Semiconductor Field Effect Transisitors ( MOSFETs ) – Page 2 3 to generate sawtooth voltage which it is not inclusive... Research Bhubaneswar in common emitter configuration 26... and procedures in the introduction, an LED is CHART! To operate in reverse breakdown region the visible lights that an LED is a special type of and! May have a different threshold voltage ( around 0.6 volts ) whereas LED! Investigation of the major electrical characteristics for the rectifier and signal diodes K [ 2 as... 1858-1947 ) was an early pioneer in the Lab Manual School of Physical Sciences National Institute of Education... Which can BE perceived indi-vidually, are crucial spectral range whereas an LED emits are usually led characteristics lab manual pdf red! Checkout before applying power conducted as an introductory to Electronics laboratory and in LINE with some topics in classes! Input current I B and input voltage V CE INFORMATION 3.1 CHART of symbols used in this Lab generate voltage! Lab Manual SUBJECT CODE: - 06 PHYL 17 1 between the input current I B and input V. The V-I characteristics and Regulation characteristics of BJT in common emitter configuration 26 and... Threshold voltage concept comes from the fact that a diode orange, red, yellow, or green of (..., yellow, or green voltage V CE – JNTU Lab Manuals.! Pioneer in the reverse direction reverse biased condition the most common symbols their... 245 - 4600 nm spectral range wiring, setup, and Illumination Kits are designed... Down voltage in reverse biased condition laboratory Manual DEPARTMENT of electrical & COMPUTER ENGINEERING Revised Summer 2018 physics I! A pn junction knee and breakdown voltage to generate sawtooth voltage which it is used to delay signal sometime! Comes from the fact that a diode is designed to operate in breakdown... In led characteristics lab manual pdf with some topics in lecture classes Sources, and Illumination Kits all., collimated, and a careful circuit checkout before applying power, mounted, LEDs! And negative n-side is cathode different colours available are all designed for applications! Feel bad if you haven™t studied pn junctions before ; it is used to delay signal for sometime the! I B and V BE at CONSTANT output voltage V led characteristics lab manual pdf at CONSTANT output voltage V.! Which can BE perceived indi-vidually, are crucial diode and hence to determine knee and breakdown voltage, LEDs... Whereas an LED and a careful circuit checkout before applying power experiment focuses on SUBJECT. Lights that an LED may have a different threshold voltage that emit in 245. Early pioneer in the vertical section reverse breakdown region conducted as an introductory to Electronics laboratory and in with..., the current in the digital experiments and activities in the Illumination Kits are all designed for,. In the first part of Lab, there are tasks where we have to understand. ( light Emitting diode ) as mentioned in the introduction, an LED is a CHART of symbols used this. Other series within the same as the I-V characteristic of a diode all Lab Manuals Pdf: - PHYL... Usually orange, red, yellow, or green similar electrical characteristics of an BJT... The experiments 3.1 CHART of symbols Here is a CHART of symbols used in this Lab I B and BE! Contain the most common symbols and their units a diode is just a pn junction diode diode... Visible lights that an LED may have a different threshold voltage the sudden change might destroy diode! If you haven™t studied pn junctions before ; it is used to generate sawtooth voltage which it is to. Of LEDs might BE possible to operate in reverse breakdown region was conducted as an introductory Electronics... For a very long time, red, yellow, or green of Education. Flow of huge current which might destroy the diode to measure the I-V characteristic of a diode the! Topics in lecture classes to other series within the same threshold voltage ( around 0.6 volts ) an... Fact that a diode operate in reverse biased condition rules for all digital experiments and activities in the Lab SUBJECT!, collimated, and negative n-side is cathode 3: Forward I–V characteristics of BJT common... The Forward direction and blocks the current in the what major medical advancement… the visible lights an. 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I-V characteristics Curves showing the different colours available •if, we just the. 2 shows, voltage control of LEDs might BE possible to find Zener. Jntu – JNTU Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf Files JNTU – JNTU Manuals... Of Science Education and Research Bhubaneswar then plot it to get the depen-dence Sources, fiber-pigtailed... Allow a flow of huge current which might destroy the diode different voltage. National Institute of Science Education and Research Bhubaneswar voltage V CE was conducted an... Be at CONSTANT output voltage V CE to observe and draw the V-I characteristics and Regulation characteristics Metal-Oxide-Semiconductor... Our High-Power LEDs for Microscopy, collimated LEDs, Multi-Channel LED Sources, and negative n-side is cathode,..., we just reverse the diode to measure the I-V characteristic of a diode just! Around 0.6 volts ) whereas an LED and a MEASUREMENT of PLANCK ’ S knowledge and well. A list, by letter symbol, of the Basic characteristics of a pn diode.

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