EET161 D.C. Principles of Electronics Units to be measured and calculated VoltageVoltsV or E ResistanceOhmsR or Current AmpsI or A Units to be measured and calculated VoltageVolts or Resistance R or AmpsI or A Textbook https://facweb.northseattle.edu/djenkins/ Current set to about 0.50 Amps Fluke Multimeter Power. Connect test leads. Set to DC. Set to V, mA or . Range. Get logged on to a computer in the lab. Multisim 2.2K mA F V M Helpful hints Please DO staple lab / experiments together. Please DO NOT staple multiple assignment together. Put your name on all Labs/Experiments now. Need for equipment serial numbers on labs? Chapter 1 Reading Reading assignment: Read Chapter 1 Lab 1 Math Review Do NOT do: Exponential Functions page 11 Numbers 34, 35, 36, 37 Algebraic Manipulations page 13 Numbers 40, 41 Lab 1 Math Review Do NOT do: Order of Operations page 15 20 Numbers 52 through 66 Graded and Recorded 10/10 8/10 Score Scored and recorded. Multimeter VOMVolt Ohm Meter VOMVolt Ohm Miliamp Meter Ohms Law page Chapter 1 Basic Concepts of Electricity The Atom ProtonsPositive charge NeutronsNeutral charge ElectronsNegative charge Page 6-7 Charge Volt If a total of 1 joule (W) of energy is used to move the negative charge of 1 coulomb (Q), there is a difference of 1 volt (V) between the two points. V=W/Q we will use V or E Voltage Applied voltage is the starting mechanism. V or E Current is a reaction to the applied voltage. A or I Voltage in an electronic circuit is the pressure and the current is the reaction to that pressure. There can be voltage without current but not current without voltage. There can be resistance without current or voltage. Resistance must be measured with the no voltage present. Current may or may not be present in a circuit. Symbol for current through out the circuit. Page A thin, solid line is the conventional symbol for a continuous piece of wire. However, the flow will be interrupted if the conductive path formed by the wire is broken: Page 27 A short circuit is an electric circuit offering little or no resistance to the flow of electrons. An open circuit is one where the continuity has been broken by an interruption in the path for electrons to flow. The symbol for a resistor. Resistance is measured in Ohms. R or Resistance Ohms Opposition to the flow of charge through an electrical circuit, called resistance, has the units of ohms and uses the Greek letter omega () as its symbol. TYPES OF RESISTORS TYPES OF RESISTORS Fixed Resistors COLOR CODING AND STANDARD RESISTOR VALUES Now we have voltage, resistance, a complete circuit and current how do we measure them ? DMM Digital Multi Meter VOM Volt Ohm Miliampmeter Analog meter Scope meter Voltage is measured across a device in question. It must be on opposite ends or sides. V or E Voltage is a specific measure of potential energy that is always relative between two points. Page 35 Without reference to two particular points, the term voltage has no meaning. 2 points with something in between to measure. Two points means we use subscripts Without reference to two particular points, the term voltage has no meaning. V source = V AB = V R Resistance is measured across a device in question. It must be on opposite ends or sides. R or Voltage sources must be removed. Current must be measured by opening the circuit and putting the meter in line or in series so that the current passes through the meter. A or I Meter Dos and Donts Short the leads of the meter to verify it is working and to see how a short is indicated. Do not make resistance measurements with power connected. Fluke Multimeter Power. Connect test leads. Set to DC. Set to . Range. Resistors Lab 2 Color Codes You must be able to distinguish colors. Must have visual acuity, including ability to distinguish colors. COLOR CODING FOR RESISTORS Textbook page 78 COLOR CODING AND STANDARD RESISTOR VALUES Third band is black which is a Zero Multiplier [the number of zeros]. Ground or common is usually associated with the negative terminal of a DC power supply. Ground or Common Unless otherwise noted the common lead of the meter is connected to the ground or common point of the circuit. OHMS LAW In electric circuits we are trying to establish the flow of current. The voltage, between two points is the cause (pressure), and the opposition is the resistance encountered. Textbook page 101 Chapter 4 Ohms Law page 40 Page 39 It is used so often in the study of electricity and electronics that it needs to be committed to memory by the serious student. Reading for chapter 2 2.6 Nonlinear conduction Page 53, 54, 55, 56 not needed for what we are doing. Quote from author: I just wanted to expose you to a little bit of the complexity of the real world, lest I give you the false impression that the whole of electrical phenomena could be summarized in a few simple equations. Experiment / Lab 2 Resistor wattage does not matter. Page 24, Table 2.1: omit 6.8 resistor. Page 25, Table 2.3: omit VOM section, and any questions referencing VOMs. Page 27, Table 2.5: Omit Page 27, Table 2.6 scales are different than lab equipment. Page 28, Table 2.7 Omit