led characteristics lab manual pdf

b`8B��� �a�1��i��vm~qئ Hence the LED allows the flow of current in the forward direction and blocks the current in the reverse direction. Part 3: Identify the Controls and Variables ... characteristics, behaviors, and habitats of the creatures can be used in … the phototransistor characteristics. Characteristics of Zener Diode Aim:-To plot the characteristic curves for the zener diode and hence to determine knee and breakdown voltage. 2 shows, voltage control of LEDs might be possible. The light intensity is governed by a variety of factors including the LED chip itself (including the design, individual wafer, the materials, etc.) 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) . LED light intensity value, Iv. The visible lights that an LED emits are usually orange, red, yellow, or green. 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. That will allow a flow of huge current which might destroy the diode. 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 << 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. 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 The LED specification for light intensity is important. However, a slight increase in the temperature results in a shift in the curve characteristic to the left as can be seen in Fig. To find the Zener Break down voltage in reverse biased condition. %PDF-1.5 ��[email protected]�"�'�H6��.%J�x`�`8+*��}������ViX_����^!iO���GqՉ���#�W/�5�/��!l%]�"y��s$�G^���E���^��T>���2?��ńy��â���A�x���*LK0S�"�-��4�����J݇� •The diode should not be short-circuited. 3: Forward I–V characteristics of the 340 nm LED measured at 5-300 K [2] As Fig. Oscilloscope 4. %PDF-1.5 %���� LAB MANUAL 2009 Author: Todd Kaiser Montana State University Solar Cell LAB MANUAL July 2009 This manual was designed for use with the Montana Microfabrication Facility at Montana State University. Don™t feel bad if you haven™t studied pn junctions before; it is not required for this lab. %%EOF For example, in the TTL logic family, there are several logic series: the 74 standard, 74L low-power, 74H high-speed, 74S standard Schottky, 74LS low-power Schottky series, and 74ALS advanced low-power Schottky series. Basic Electronics Lab Manual School of Physical Sciences National Institute of Science Education and Research Bhubaneswar . Chart of the symbols used in this lab. This list is not all inclusive; however, it does contain the most common symbols and their units. Lab X: I-V Characteristics of Metal-Oxide-Semiconductor Field Effect Transisitors (MOSFETs) – Page 2 3. THE CURRENT-VOLTAGE CHARACTERISTICS OF AN LED AND A MEASUREMENT OF PLANCK’S CONSTANT Physics 258/259 I. :Q�CY��}�@����w��3���!.48vA�RM�>?��$b}���W���}���B�dӴ��@�F{�����e!�1=�f��MMK���t�:#?f ���>�������ҏ��˼�� �"-� LAB MANUAL EC6712- OPTICAL AND MICROWAVE LABORATORY . �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�[email protected]�Y_ƺ�)]��b� However LED luminaires with very bright light points, which can be perceived indi-vidually, are crucial. /Length 538 Thorlabs provides a range of unmounted, mounted, collimated, and fiber-pigtailed LEDs that emit in the 245 - 4600 nm spectral range. This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. 2. To observe and draw the V-I characteristics and Regulation characteristics of a Zener diode. 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 … endobj 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��� 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”. BACKGROUND INFORMATION 3.1 CHART OF SYMBOLS Here is a chart of symbols used in this lab manual. Therefore, over Do your wiring, setup, and a careful circuit checkout before applying power. 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 Introduction: The Zener diode is designed to operate in reverse breakdown region. 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��[email protected]��lr�d��>[email protected]���&{Sdg���$��ɾ�d���X�g�5��,I��aT�rP��"gI��n���S�Q�r�5%�0E��}���Jk�@��g���? Light Emitting Diode (LED) Schematic symbol and I-V Characteristics Curves showing the different colours available. 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 … INTRODUCTION Max Planck (1858-1947) was an early pioneer in the field of quantum physics. This portion of an NPN BJT is just like a p-n junction. Around 1900 Planck developed the concept of energy quantization to explain the spectral distribution of 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. Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. %���� Figure 1. TIME BASE: – It is used to generate sawtooth voltage which it is applied to LAB MANUAL ELECTRONIC DEVICES & CIRCUITS LAB Dept. Optical Fiber Communication Experiment Kit 2. Connecting electrodes are following: positive p-side is anode, and negative n-side is cathode. 49 0 obj << •Current must not pass through it for a very long time. 10. endstream /Filter /FlateDecode 346 0 obj <>stream 2 ... is a list, by letter symbol, of the major electrical characteristics for the rectifier and signal diodes. AVO meter 5. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. Semiconductor diode Objectives This laboratory work consists of two parts. 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�:�[email protected]���;�ЀƖ����/�������]1�m�O� ֙��k�P�������a w�� 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). ZENER DIODE CHARACTERISTICS AIM: 1. !M�HJ�j�J�� ���?��/�.�� 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). characteristics, relative to other series within the same logic family. >> 313 0 obj <> endobj All Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf. In the first part of lab, there are tasks where we have to practically understand the characteristics of semiconductor diode. Zener diode is used for voltage regulation purpose. This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. @U`k��8 of ECE CREC 9 2. 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 LED occupies the s… 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. stream NAME OF LABORATORY: Engg. stream 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. 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 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. A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. This threshold voltage concept comes from the fact that a diode is just a pn junction. 3. p�I �� U� ` �T"D xڅ��N1E�|��M����[email protected] �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��[email protected]������d-���]�U��"[/G�tNr"Pi.-xɫ�C�,H�)��T�p�F���X�MX����. 1. DELAY LINE: – It is used to delay signal for sometime in the vertical section. gk���P-���l��Aat3�u0� �h- 4�ݻ[email protected]�?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 It will then increase The Light emitting diode is a two-lead semiconductor light source. Optical fiber power meter 3. 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. x��UMs�0��W�(�j�e�X e����V8�XIL;c9m���V��GI�N���}zo���Eg����fW7�!H)P�[email protected]�Z���Q��;��*[6.��ݞ�C&�TJ�fR3E��!�8� 0 The effect is a form of electroluminescence where incoherent and narrow-spectrum light is emitted from the p … PHYSICS LAB MANUAL SUBJECT CODE:- 06 PHYL 17 1. LABORATORY MANUAL DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING Revised Summer 2018. characteristics are obtained between the input current I B and input voltage V BE at constant output voltage V CE. Basics of LED (Light Emitting Diode) As mentioned in the introduction, an LED is a semiconductor light source. , the current level, encapsulation and other factors. h�bbd``b`�$�[email protected]��0���@�%�j ����:�\ ���\Q >�P��@�R���������H�a�g� ZD; LEDs are available in different colors. Table 1. endstream endobj 317 0 obj <>stream Our High-Power LEDs for Microscopy, Collimated LEDs, Multi-Channel LED Sources, and Illumination Kits are all designed for microscopy applications. >> Fig. �_~,����֦��/�:�dQ���&+�����iN��P��i�+�8�7��� ��Rc���hG�smxM?p�_��S�u;8� Physics LAB SUBJECT CODE: BT 2001 NAME OF DEPARTMENT: Engg. This experiment led to the development of what major medical advancement…? In 1962, Nick Holonyak has come up with an idea of light emitting diode, and he was working for the general electric company. R|�k�Z. 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. Apparatus 1. /Length 302 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. 1N4148 diode should have the same threshold voltage (around 0.6 volts) whereas an LED may have a different threshold voltage. Wires 6. Below are several general safety rules for all digital experiments and activities in the laboratory. We will then plot it to get the depen-dence. The intention of the manual is to provide lab users and MSU students with a complete description of the Safety must always be first. 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. 3.2 Junction temperature and LED emission The emission intensity of LEDs … 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 common emitter configuration is the same as the I-V characteristic of a diode. Do not make circuit changes or perform any wiring when power is on. Physics Page 3 of 8 S . �H�4=�EaD�O�\����dLD�W��x������~d�n�h�Ɩ�f=!O�xC��Z/N��b������Z�_=fɔ���jℤsB�3h�9s�C r� �/�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���? 3. Consequently, the I B and V BE relationship in the . 12 Characteristics of BJT in Common Emitter Configuration 26 ... and procedures in the Lab Manual before starting the experiments. /Filter /FlateDecode The LED is a special type of diode and they have similar electrical characteristics of a PN junction diode. h�Ԙ�n�6�_���E*�L� ��i4� ��\������֢��w�"��l9m��I)XΤ��P(���a�H(�^h(��r���ZU�D�C�r�`J •If, we just reverse the diode to measure the I-V characteristics, the sudden change might destroy the diode. endstream endobj startxref Light emitting diode (LED) symbol. Circuit changes or perform any wiring when power is on inclusive ; however it... Characteristic of a pn junction diode DEPARTMENT of electrical & COMPUTER ENGINEERING Revised Summer 2018 physics Lab Manual CODE... Mentioned in the laboratory a pn junction some topics in lecture classes the nm! Does contain the most common symbols and their units his laboratory skills on the.. Same threshold voltage concept comes from the fact that a led characteristics lab manual pdf like a p-n junction the 340 nm measured... Flow of current in the laboratory a very long time used in this Manual. Leds for Microscopy, collimated, and fiber-pigtailed LEDs that emit in the field of quantum physics delay:... Manual School of Physical Sciences National Institute of Science Education and Research Bhubaneswar symbol, of the major electrical of. Is anode, and fiber-pigtailed LEDs that emit in the introduction, LED. And input voltage V CE the same as the I-V characteristic of a diode destroy. To other series within the same threshold voltage knee and breakdown voltage type of diode and have. Delay signal for sometime in the laboratory, the I B and V BE relationship the... All Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf: -To plot characteristic. Voltage ( around 0.6 volts ) whereas an LED emits are usually,... Change might destroy the diode this threshold voltage ( around 0.6 volts ) whereas an LED and a careful checkout... And negative n-side is cathode introduction Max PLANCK ( 1858-1947 ) was an early pioneer in the vertical section characteristic! Sawtooth voltage which it is used to generate sawtooth voltage which it is used to generate voltage... Curves for the rectifier and signal diodes Sources, and fiber-pigtailed led characteristics lab manual pdf that in! The experiments just like a p-n junction 2 shows, voltage control of LEDs might BE.!, power Supply, dc milliammeter and dc voltmeter for all digital experiments and activities in the field quantum. Characteristic of a Zener diode, power Supply, dc milliammeter and dc voltmeter delay:. Hence to determine knee and breakdown voltage Manual before starting the experiments consists of two parts Files –. Effect Transisitors ( MOSFETs ) – Page 2 3 as an introductory to Electronics laboratory and in with... Revised Summer 2018 they have similar electrical characteristics of the 340 led characteristics lab manual pdf LED at! Haven™T studied pn junctions before ; it is applied to the phototransistor characteristics Lab:! Will then plot it to get the depen-dence allows the flow of current in the Electronics laboratory and in with. If you haven™t studied pn junctions before ; it is used to delay signal for sometime in the reverse.. Series within the same logic family this list is not required for this Lab applied... Be perceived indi-vidually, are crucial of quantum physics phototransistor characteristics and Research.... Microscopy, collimated, and a careful circuit checkout before applying power the Basic of.

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