Around 1900 Planck developed the concept of energy quantization to explain the spectral distribution of @U`k��8 This was conducted as an introductory to Electronics laboratory and in line with some topics in lecture classes. PHYSICS LAB MANUAL SUBJECT CODE:- 06 PHYL 17 1. ��X@8�"�'�H6��.%J�x`�`8+*��}������ViX_����^!iO���GqՉ���#�W/�5�/��!l%]�"y��s$�G^���E���^��T>���2?��ńy��â���A�x���*LK0S�"�-��4�����J݇� 3.2 Junction temperature and LED emission The emission intensity of LEDs … With each of these devices, the current increased as the light increased The photodiode was measured by using the base and collector leads of the phototransistor The phototransistor measurements were made between the emitter and collector The device is capable of emitting a fairly narrow bandwidth of visible or invisible light when its internal diode junction attains a forward electric current or voltage. 1. Safety must always be first. It consists of a PN Junction Diode and when voltage is applied to the LED, electrons and holes recombine in the PN Junction and release energy in the form of light (Photons). 49 0 obj << NAME OF LABORATORY: Engg. This was also to e xpand the student’s knowledge and as well as his laboratory skills on the subject. Connecting electrodes are following: positive p-side is anode, and negative n-side is cathode. Optical Fiber Communication Experiment Kit 2. We will then plot it to get the depen-dence. �/�Z��Eֶ���L�CZ:A���B��I{r��)24L�t�{��& ��Zʄ}~T�˔dݜ�>�����7����M�����0y�;Hޣ��e誼�'"���e��27%'����[T�"ċ�c��dq�������&�� ��@�b�x���S .�'C�*�O�u���E.�;�\\�'.�;čH�!n� .��\�Ii�Wi�.��"G44\h|�RK>�����o��G��c*>��y;f���6�-ջ��[�#o�M�}��}�;�,�%���}�vQ�}Qu?��k�i!QƆ�kLe^��E%�T"RJ��y��x��y�u�;2�|�ۈM�Q��q\��E������ �]Nu�!�KG��LJ�Hm�h�7�����oO�RǾ!��N����y�}Y�[*�{�f:�[��ކ��JmZ��t^�J���� U2ʁH�6�b�T;�b!�}*�f�X�:�_��P�P����}ƨ��m[8BUU�ۣ�ȯ-E� �nr�xCΊ�R �1X|ӪV�;�Vp�S����%}D�_D�I�j�:�z�"��MJ8$uR�8�$T�X��G*稪�kK��C���? %PDF-1.5 LAB MANUAL ELECTRONIC DEVICES & CIRCUITS LAB Dept. Therefore, over ZENER DIODE CHARACTERISTICS AIM: 1. 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. Optical fiber power meter 3. TIME BASE: – It is used to generate sawtooth voltage which it is applied to Hence the LED allows the flow of current in the forward direction and blocks the current in the reverse direction. 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. Semiconductor diode Objectives This laboratory work consists of two parts. Wires 6. 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. 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 intention of the manual is to provide lab users and MSU students with a complete description of the Characteristics of Zener Diode Aim:-To plot the characteristic curves for the zener diode and hence to determine knee and breakdown voltage. endstream endobj startxref A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. Don™t feel bad if you haven™t studied pn junctions before; it is not required for this lab. Physics Page 3 of 8 S . Zener diode is used for voltage regulation purpose. 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. The LED occupies the s… 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. This list is not all inclusive; however, it does contain the most common symbols and their units. h�bbd``b`�$�Xm@��0���@�%�j ����:�\ ���\Q >�P��@�R���������H�a�g� ZD; �_~,����֦��/�:�dQ���&+�����iN��P��i�+�8�7��� ��Rc���hG�smxM?p�_��S�u;8� In 1962, Nick Holonyak has come up with an idea of light emitting diode, and he was working for the general electric company. 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. All Lab Manuals Pdf Files JNTU – JNTU Lab Manuals Pdf. 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. Physics LAB SUBJECT CODE: BT 2001 NAME OF DEPARTMENT: Engg. :Q�CY��}�@����w��3���!.48vA�RM�>?��$b}���W���}���B�dӴ��@�F{�����e!�1=�f��MMK���t�:#?f ���>�������ҏ��˼�� �"-� However LED luminaires with very bright light points, which can be perceived indi-vidually, are crucial. It will then increase %%EOF /Length 302 12 Characteristics of BJT in Common Emitter Configuration 26 ... and procedures in the Lab Manual before starting the experiments. characteristics, relative to other series within the same logic family. Do not make circuit changes or perform any wiring when power is on. 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. Apparatus: Zener diode, Power Supply, dc milliammeter and dc voltmeter. This portion of an NPN BJT is just like a p-n junction. 313 0 obj <> endobj 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. R|�k�Z. 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 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 … The Light emitting diode is a two-lead semiconductor light source. 70 0 obj << Light Emitting Diode (LED) Schematic symbol and I-V Characteristics Curves showing the different colours available. 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) . 346 0 obj <>stream %PDF-1.5 %���� 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 Consequently, the I B and V BE relationship in the . The LED is a special type of diode and they have similar electrical characteristics of a PN junction diode. 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. CONCLUSION This experiment focuses on the investigation of the basic characteristics of a diode. •The diode should not be short-circuited. 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. In the first part of lab, there are tasks where we have to practically understand the characteristics of semiconductor diode. 0 %���� DELAY LINE: – It is used to delay signal for sometime in the vertical section. 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 •If, we just reverse the diode to measure the I-V characteristics, the sudden change might destroy the diode. Table 1. 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����. In this Lab, there are tasks where we have to practically understand the characteristics of an LED a. 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