Lab1 - Use of Equipments

Lab1 - Use of Equipments - THE HONG KONG UNIVERSITY OF...

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Page 1 of 4 THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY Department of Electronic and Computer Engineering ELEC 151 Laboratory 1 Use of Equipments Grading ± This lab accounts for 1% of your overall grade. Objectives To be familiar with the equipments used in the Microprocessor Laboratory (Lab 3115). This is primarily an introduction to the use of the power supply, the digital multimeter and the digital logic probe. This lab is the basis for all the work done in this course. Therefore, you should learn the material discussed here THOROUGHLY. To investigate the detailed behavior of TTL logic gates and learn how to use light emitting diodes as a simple method for output observations. Specifically, you will: 1. Become familiar with the power supply and digital multimeter. 2. Become familiar with the organization of the TTL Data Book. 3. Measure the input-output relationship of a typical TTL gate, and find the "switching threshold". 4. Learn how to use a light emitting diode (LED) as a digital output device. Parts Required Power Supply, Multimeter, Logic Probe, Breadboard, 74LS04, LED, 330 resistor. Prelab This lab will take the full lab period; prepare yourself well so that in the lab you can start with the experiment right-away. If you do this experiment with a partner, also enter your partner's name clearly in the header of the summary sheet for this experiment. Study the whole lab write-up. Write down the points you do not understand so that you can pay particular attention to them or ask your TA during the lab. In the beginning of the lab session, you will join your TAs for a short demonstration of the Digital Logic Probe. Experiments 1. Power Supply and Digital Multimeter Electronic circuits need power. The low-voltage power supply that you find in the lab is suitable to drive the transistor circuits that you will be building. Sign out a digital multimeter from your TA/TO. This is a very useful device for checking power and ground voltages. The TES 2201 multimeter in the lab can measure voltage (AC or DC), current, or resistance, depending on how you set the control and how you connect it to your circuit. To operate the meter, select the type (voltage, current, or resistance) and the appropriate scale of measurement desired with the rotary button. Connect the banana plug cables into the sockets marked COM and VA . Use the 10A socket if you are planning to measure current exceeding 200mA. (Note: labels of the buttons and sockets for individual equipment may differ - make your own judgment and if you are still in doubt, ask your TA or TO) In this course, you will most often use the multimeter for DC voltage measurements. Remember that any AC signal in the circuit you are measuring will be averaged by the meter; it is then better
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Page 2 of 4 to use an oscilloscope. At times you may also wish to measure DC current —
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This note was uploaded on 09/16/2010 for the course ELEC 151 taught by Professor Cy during the Spring '10 term at HKUST.

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Lab1 - Use of Equipments - THE HONG KONG UNIVERSITY OF...

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