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The LED occupies the s… The effect is a form of electroluminescence where incoherent and narrow-spectrum light is emitted from the p … 70 0 obj << 3: Forward I–V characteristics of the 340 nm LED measured at 5-300 K [2] As Fig. INTRODUCTION Max Planck (1858-1947) was an early pioneer in the field of quantum physics. •The diode should not be short-circuited. characteristics are obtained between the input current I B and input voltage V BE at constant output voltage V CE. 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� Introduction: The Zener diode is designed to operate in reverse breakdown region. R|�k�Z. �/�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���? This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. /Filter /FlateDecode BACKGROUND INFORMATION 3.1 CHART OF SYMBOLS Here is a chart of symbols used in this lab manual. p�I �� U� ` �T"D However LED luminaires with very bright light points, which can be perceived indi-vidually, are crucial. In 1962, Nick Holonyak has come up with an idea of light emitting diode, and he was working for the general electric company. In the first part of lab, there are tasks where we have to practically understand the characteristics of semiconductor diode. 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 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. It will then increase The Light emitting diode is a two-lead semiconductor light source. We will then plot it to get the depen-dence. This list is not all inclusive; however, it does contain the most common symbols and their units. 2 ... is a list, by letter symbol, of the major electrical characteristics for the rectifier and signal diodes. 0 However, a slight increase in the temperature results in a shift in the curve characteristic to the left as can be seen in Fig. endstream Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. stream Apparatus 1. Our High-Power LEDs for Microscopy, Collimated LEDs, Multi-Channel LED Sources, and Illumination Kits are all designed for microscopy applications. @U`k��8 Zener diode is used for voltage regulation purpose. 2 shows, voltage control of LEDs might be possible. THE CURRENT-VOLTAGE CHARACTERISTICS OF AN LED AND A MEASUREMENT OF PLANCK’S CONSTANT Physics 258/259 I. PHYSICS LAB MANUAL SUBJECT CODE:- 06 PHYL 17 1. Connecting electrodes are following: positive p-side is anode, and negative n-side is cathode. endstream endobj 317 0 obj <>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. 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���? The visible lights that an LED emits are usually orange, red, yellow, or green. 12 Characteristics of BJT in Common Emitter Configuration 26 ... and procedures in the Lab Manual before starting the experiments. Chart of the symbols used in this lab. TIME BASE: – It is used to generate sawtooth voltage which it is applied to 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��� This threshold voltage concept comes from the fact that a diode is just a pn junction. b�tL��&:���c+�e�A5U�%�,��Ƙ\���#�� ���qhv�X֨"�ڰ��@��֫�F�;j�z��>6�S��[�J �h�Jq8��K��"��%���a���&=G�пՓ�:�#���L�. Safety must always be first. Therefore, over The light intensity is governed by a variety of factors including the LED chip itself (including the design, individual wafer, the materials, etc.) %���� 1. 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 Fig. 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). Below are several general safety rules for all digital experiments and activities in the laboratory. This experiment led to the development of what major medical advancement…? 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. Table 1. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. Consequently, the I B and V BE relationship in the . �_~,����֦��/�:�dQ���&+�����iN��P��i�+�8�7��� ��Rc���hG�smxM?p�_��S�u;8� 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. This portion of an NPN BJT is just like a p-n junction. !M�HJ�j�J�� ���?��/�.�� %%EOF :Q�CY��}�@����w��3���!.48vA�RM�>?��$b}���W���}���B�dӴ��@�F{�����e!�1=�f��MMK���t�:#?f ���>�������ҏ��˼�� �"-� NAME OF LABORATORY: Engg. endstream endobj startxref Wires 6. Figure 1. /Length 538 3. Physics LAB SUBJECT CODE: BT 2001 NAME OF DEPARTMENT: Engg. �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� LABORATORY MANUAL DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING Revised Summer 2018. To find the Zener Break down voltage in reverse biased condition. 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. 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) . Basic Electronics Lab Manual School of Physical Sciences National Institute of Science Education and Research Bhubaneswar . 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 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 Page 3 of 8 S . 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”. 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. 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. Don™t feel bad if you haven™t studied pn junctions before; it is not required for this lab. Optical fiber power meter 3. 346 0 obj <>stream 3.2 Junction temperature and LED emission The emission intensity of LEDs … /Length 302 This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. 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). b`8B��� �a�1��i��vm~qئ Do not make circuit changes or perform any wiring when power is on. endobj To observe and draw the V-I characteristics and Regulation characteristics of a Zener diode. ZENER DIODE CHARACTERISTICS AIM: 1. •If, we just reverse the diode to measure the I-V characteristics, the sudden change might destroy the diode. h�Ԙ�n�6�_���E*�L� ��i4� ��\������֢��w�"��l9m��I)XΤ��P(���a�H(�^h(��r���ZU�D�C�r�`J Lab X: I-V Characteristics of Metal-Oxide-Semiconductor Field Effect Transisitors (MOSFETs) – Page 2 3. LEDs are available in different colors. The LED specification for light intensity is important. 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. •Current must not pass through it for a very long time. Light Emitting Diode (LED) Schematic symbol and I-V Characteristics Curves showing the different colours available. 313 0 obj <> endobj stream 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 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 … 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. 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. Hence the LED allows the flow of current in the forward direction and blocks the current in the reverse direction. Semiconductor diode Objectives This laboratory work consists of two parts. That will allow a flow of huge current which might destroy the diode. %PDF-1.5 %���� 3. DELAY LINE: – It is used to delay signal for sometime in the vertical section. 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 Oscilloscope 4. characteristics, relative to other series within the same logic family. Do your wiring, setup, and a careful circuit checkout before applying power. Light emitting diode (LED) symbol. Optical Fiber Communication Experiment Kit 2. The LED is a special type of diode and they have similar electrical characteristics of a PN junction diode. 10. h�bbd``b`�$�Xm@��0���@�%�j ����:�\ ���\Q >�P��@�R���������H�a�g� ZD; >> 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. All Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf. Basics of LED (Light Emitting Diode) As mentioned in the introduction, an LED is a semiconductor light source. �H�4=�EaD�O�\����dLD�W��x������~d�n�h�Ɩ�f=!O�xC��Z/N��b������Z�_=fɔ���jℤsB�3h�9s�C r� 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����. 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