Resistor's Color Code (Record four color bands) Red-Violet-Orange-Silver Coded Resistance (D) 27k O Tolerance (8) 10%...
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Resistor's Color Code (Record four color bands) Red-Violet-Orange-Silver Coded Resistance (D) 27k O Tolerance (8) 10% Maximum Coded Resistance (2) 27k+2.7k= 29.7k(Q) Minimum Coded Resistance (12) Measured Resistance (22) 27k-2.7k 24.3k(2) 25.1 k Resistor in Tolerance YES + . . . R1 ŠIOKO 10% Key-A Figure 2-Measuring a potentiometer As shown in Figure 2, the DMM will display the resistance of the wiper with respect to circuit ground. Adjust the potentiometer to display 50%. Measure the resistance from ground to the center (wiper arm) terminal of the potentiometer. Change the position the position on the potentiometer slide. You should observe the resistance value change on the DMM. Modify the circuit of Figure 2 to include a second DMM that will measure the resistance between the wiper and the top terminal of the potentiometer. Design a circuit in Multisim that will allow measurement of the total resistance of a SkQ fixed resistor connected in series to a 10k potentiometer so that the total resistance range will be 5k0-15k0. File Upload: Submit the Multisim design file and completed table via Moodle. Potentiometers Potentiometers are resistors whose value can be varied, depending on the position of a shaft or screw. The picture below shown some examples of different styles Wiper Conductive plastic Potentiometers Circular ones work like the diagram on the left. The center terminal is connected to the "wiper, which conducts a piece of carbon, plastic or call of wine. The rectangular "par" is constructed as shown on the right, with a tiny lead screw for adjustment. Exercise: Resistor tolerance, Pots and DMM Use Equipment DMM, five (5) resistors, one (1) potentiometer, wires Procedure: . Select assorted resistors from the fixed resistor component list in Multisin. As you select each resistor value, a default of RX (where X-a number will be displayed by the resistor such as R1- RS) Use Musim to construct Figure 1. (NOTE Musim must always have a ground connection in order to operat 1080 THE Figure 1-Five resistors selected in Multisim with DMM Record the value of the resiston labeled R3-85 in the Measured Value column of the table Next record the color code for each resistor in the Resistor's Color Code column of the table. This will be a four band color code. The last band will be determined in the next STEP Determine the tolerance of each resistor as described on each component by the color of its band. A gold band represents 5%, a silver band represents 10%, and no band represents 20% tolerance. Add the color band for tolerance to the first column to complete the four band color code of each resistor. Record the stated tolerance of each resistor in the Tolerance column in the table. . The following formula would be used to calculate the NError of an actual (REAL) resistor using the following formula where Nominal is the color code value of a resistor and Measured would be the value displayed by the DMM %Emar (Nominal-Measured)/Nomin100% Note: In some cases the measured valve can be larger than the nominal value which would result in a negative percentage. Just take the absolute value to always report a positive percentage Next select a linear variable resistor from the component list in Multisim and set the value to be 10. Construct the circuit shown in Figure 2. Objective: . . . . . Introduction: Parts of the DMM (to be explained by Instructor or T/A) . . . For the student to interpret and record the ohmic value of a resistor when given a color-coded resistor. For the student to understand the operation and functions of a digital multimeter. For the student to measure the ohmic value of a resistor using a digital multimeter. For the student to determine whether a resistor is within its coded tolerance. Leads Function selector O DC Volts O AC Volts DC Current AC Current Resistance O 0 0 o Scales O Readout DC vs. AC Fuse Other Functions ECG MULTIMETER OM-50 2044 Laboratory 1: Resistors & Use of DMM DCV DCA OFF ON CE CEN-TECH A voltmeter is designed to measure the voltage between any two points in a circuit, when the circuit is energized If the voltage t measured is v12-v1-v2, then the black probe is placed on node 2 (corresponding to vi) and the red probe donnode 1 (corresponding to v1). Since the voltmeter is placed in parallel with a part of the circuit it potentially can disrup toperation Ideally, a voltmeter's resistance is infinite there would I circuit operation An ammeter is designed measure current at a point in an energized circut. To take this reading the cut must be disconnected at point of interest and the ammeter inserted in series with the circuit at that point Again, the ammeter can potentially disrupt circuit operation Ideally, an ammeter's resistance is re-in which case there would be no change in circuit operation An ohmmeter is designed to measure the resistance of a device. To do so, the device must be disconnected from the circult for else the resistance of the device in parallel with the circuit is measured). Two-wire and four-wire resistance measurement techniques are possible, as discovered in the laboratory exercise Breadboards and their use A breadboard also known as protoboard is a type of solderless electronic circuit building. You can build a electronic circuit on a breadboard without any soldering! Best of all it is reusable. Building er prototyping circuits on a breadboard is also known as 'breadboarding. The breadboard allows you to assemble circuits by placing components into the holes, officially called contact points but usually just points, which are connected internally in various patterns. You can find more at http://www.engineersgarage.com/insight/how-breadboard-works Breadboards are usually divided into four sections, two outer sections and two inner sections. Each row of five sockets in the inner sections are electrically connected to each other (see the green lines in the next figure). The two outer sections of the breadboard are usually used exclusively for power. On many breadboards these sockets will be labeled with colors denoting positive voltage (usually red) and ground (black or blue). It is important to note that on many breadboards the power lines only run half the length of the board (as indicated in the next figure). You will need to run a wire between these two sections to send power to from one end to the other. There is nothing special about the outer sections of the breadboard that makes particularly suitable for power other than that they run most of the length of the board, but if you choose to use these rows for other things you may confuse others or even yourself, so it is good practice to use these for power only. mam main Resistor Color Codes Resistor values can be determined by reading the bands of color printed on the resistor XICON OW 1507 Resiston of different wattages showing color code bands Bottom-0.25W Color bands give resistance and tolerance Gold tolerance band is +/-5%, silver is +/- 10%. Read values by taking first two digits and multiply by 10 where d3 is the number represented by the third color band. Chart is below. For example the resistor in the middle is a 1W, 47 x 10' 0 or 470 resistor. The one above it is 26, 27 x 100 27000 or 2.0 ca HOME Orange TE B Potentiometers Potentiometers are resistors whose value can be varied, depending on the position of a shaft or screw. The picture below shown some examples of different styles Wiper Conductive plastic Potentiometers Circular ones work like the diagram on the left. The center terminal is connected to the "wiper, which conducts a piece of carbon, plastic or call of wine. The rectangular "par" is constructed as shown on the right, with a tiny lead screw for adjustment. Exercise: Resistor tolerance, Pots and DMM Use Equipment DMM, five (5) resistors, one (1) potentiometer, wires Procedure: . Select assorted resistors from the fixed resistor component list in Multisin. As you select each resistor value, a default of RX (where X-a number will be displayed by the resistor such as R1- RS) Use Musim to construct Figure 1. (NOTE Musim must always have a ground connection in order to operat 1080 THE Figure 1-Five resistors selected in Multisim with DMM Record the value of the resiston labeled R3-85 in the Measured Value column of the table Next record the color code for each resistor in the Resistor's Color Code column of the table. This will be a four band color code. The last band will be determined in the next STEP Determine the tolerance of each resistor as described on each component by the color of its band. A gold band represents 5%, a silver band represents 10%, and no band represents 20% tolerance. Add the color band for tolerance to the first column to complete the four band color code of each resistor. Record the stated tolerance of each resistor in the Tolerance column in the table. . The following formula would be used to calculate the NError of an actual (REAL) resistor using the following formula where Nominal is the color code value of a resistor and Measured would be the value displayed by the DMM %Emar (Nominal-Measured)/Nomin100% Note: In some cases the measured valve can be larger than the nominal value which would result in a negative percentage. Just take the absolute value to always report a positive percentage Next select a linear variable resistor from the component list in Multisim and set the value to be 10. Construct the circuit shown in Figure 2. . . . R1 ŠIOKO 10% Key-A Figure 2-Measuring a potentiometer As shown in Figure 2, the DMM will display the resistance of the wiper with respect to circuit ground. Adjust the potentiometer to display 50%. Measure the resistance from ground to the center (wiper arm) terminal of the potentiometer. Change the position the position on the potentiometer slide. You should observe the resistance value change on the DMM. Modify the circuit of Figure 2 to include a second DMM that will measure the resistance between the wiper and the top terminal of the potentiometer. Design a circuit in Multisim that will allow measurement of the total resistance of a SkQ fixed resistor connected in series to a 10k potentiometer so that the total resistance range will be 5k0-15k0. File Upload: Submit the Multisim design file and completed table via Moodle. Resistor's Color Code (Record four color bands) Red-Violet-Orange-Silver Coded Resistance (D) 27k O Tolerance (8) 10% Maximum Coded Resistance (2) 27k+2.7k= 29.7k(Q) Minimum Coded Resistance (12) Measured Resistance (22) 27k-2.7k 24.3k(2) 25.1 k Resistor in Tolerance YES + Resistor's Color Code (Record four color bands) Red-Violet-Orange-Silver Coded Resistance (D) 27k O Tolerance (8) 10% Maximum Coded Resistance (2) 27k+2.7k= 29.7k(Q) Minimum Coded Resistance (12) Measured Resistance (22) 27k-2.7k 24.3k(2) 25.1 k Resistor in Tolerance YES + . . . R1 ŠIOKO 10% Key-A Figure 2-Measuring a potentiometer As shown in Figure 2, the DMM will display the resistance of the wiper with respect to circuit ground. Adjust the potentiometer to display 50%. Measure the resistance from ground to the center (wiper arm) terminal of the potentiometer. Change the position the position on the potentiometer slide. You should observe the resistance value change on the DMM. Modify the circuit of Figure 2 to include a second DMM that will measure the resistance between the wiper and the top terminal of the potentiometer. Design a circuit in Multisim that will allow measurement of the total resistance of a SkQ fixed resistor connected in series to a 10k potentiometer so that the total resistance range will be 5k0-15k0. File Upload: Submit the Multisim design file and completed table via Moodle. Potentiometers Potentiometers are resistors whose value can be varied, depending on the position of a shaft or screw. The picture below shown some examples of different styles Wiper Conductive plastic Potentiometers Circular ones work like the diagram on the left. The center terminal is connected to the "wiper, which conducts a piece of carbon, plastic or call of wine. The rectangular "par" is constructed as shown on the right, with a tiny lead screw for adjustment. Exercise: Resistor tolerance, Pots and DMM Use Equipment DMM, five (5) resistors, one (1) potentiometer, wires Procedure: . Select assorted resistors from the fixed resistor component list in Multisin. As you select each resistor value, a default of RX (where X-a number will be displayed by the resistor such as R1- RS) Use Musim to construct Figure 1. (NOTE Musim must always have a ground connection in order to operat 1080 THE Figure 1-Five resistors selected in Multisim with DMM Record the value of the resiston labeled R3-85 in the Measured Value column of the table Next record the color code for each resistor in the Resistor's Color Code column of the table. This will be a four band color code. The last band will be determined in the next STEP Determine the tolerance of each resistor as described on each component by the color of its band. A gold band represents 5%, a silver band represents 10%, and no band represents 20% tolerance. Add the color band for tolerance to the first column to complete the four band color code of each resistor. Record the stated tolerance of each resistor in the Tolerance column in the table. . The following formula would be used to calculate the NError of an actual (REAL) resistor using the following formula where Nominal is the color code value of a resistor and Measured would be the value displayed by the DMM %Emar (Nominal-Measured)/Nomin100% Note: In some cases the measured valve can be larger than the nominal value which would result in a negative percentage. Just take the absolute value to always report a positive percentage Next select a linear variable resistor from the component list in Multisim and set the value to be 10. Construct the circuit shown in Figure 2. Objective: . . . . . Introduction: Parts of the DMM (to be explained by Instructor or T/A) . . . For the student to interpret and record the ohmic value of a resistor when given a color-coded resistor. For the student to understand the operation and functions of a digital multimeter. For the student to measure the ohmic value of a resistor using a digital multimeter. For the student to determine whether a resistor is within its coded tolerance. Leads Function selector O DC Volts O AC Volts DC Current AC Current Resistance O 0 0 o Scales O Readout DC vs. AC Fuse Other Functions ECG MULTIMETER OM-50 2044 Laboratory 1: Resistors & Use of DMM DCV DCA OFF ON CE CEN-TECH A voltmeter is designed to measure the voltage between any two points in a circuit, when the circuit is energized If the voltage t measured is v12-v1-v2, then the black probe is placed on node 2 (corresponding to vi) and the red probe donnode 1 (corresponding to v1). Since the voltmeter is placed in parallel with a part of the circuit it potentially can disrup toperation Ideally, a voltmeter's resistance is infinite there would I circuit operation An ammeter is designed measure current at a point in an energized circut. To take this reading the cut must be disconnected at point of interest and the ammeter inserted in series with the circuit at that point Again, the ammeter can potentially disrupt circuit operation Ideally, an ammeter's resistance is re-in which case there would be no change in circuit operation An ohmmeter is designed to measure the resistance of a device. To do so, the device must be disconnected from the circult for else the resistance of the device in parallel with the circuit is measured). Two-wire and four-wire resistance measurement techniques are possible, as discovered in the laboratory exercise Breadboards and their use A breadboard also known as protoboard is a type of solderless electronic circuit building. You can build a electronic circuit on a breadboard without any soldering! Best of all it is reusable. Building er prototyping circuits on a breadboard is also known as 'breadboarding. The breadboard allows you to assemble circuits by placing components into the holes, officially called contact points but usually just points, which are connected internally in various patterns. You can find more at http://www.engineersgarage.com/insight/how-breadboard-works Breadboards are usually divided into four sections, two outer sections and two inner sections. Each row of five sockets in the inner sections are electrically connected to each other (see the green lines in the next figure). The two outer sections of the breadboard are usually used exclusively for power. On many breadboards these sockets will be labeled with colors denoting positive voltage (usually red) and ground (black or blue). It is important to note that on many breadboards the power lines only run half the length of the board (as indicated in the next figure). You will need to run a wire between these two sections to send power to from one end to the other. There is nothing special about the outer sections of the breadboard that makes particularly suitable for power other than that they run most of the length of the board, but if you choose to use these rows for other things you may confuse others or even yourself, so it is good practice to use these for power only. mam main Resistor Color Codes Resistor values can be determined by reading the bands of color printed on the resistor XICON OW 1507 Resiston of different wattages showing color code bands Bottom-0.25W Color bands give resistance and tolerance Gold tolerance band is +/-5%, silver is +/- 10%. Read values by taking first two digits and multiply by 10 where d3 is the number represented by the third color band. Chart is below. For example the resistor in the middle is a 1W, 47 x 10' 0 or 470 resistor. The one above it is 26, 27 x 100 27000 or 2.0 ca HOME Orange TE B Potentiometers Potentiometers are resistors whose value can be varied, depending on the position of a shaft or screw. The picture below shown some examples of different styles Wiper Conductive plastic Potentiometers Circular ones work like the diagram on the left. The center terminal is connected to the "wiper, which conducts a piece of carbon, plastic or call of wine. The rectangular "par" is constructed as shown on the right, with a tiny lead screw for adjustment. Exercise: Resistor tolerance, Pots and DMM Use Equipment DMM, five (5) resistors, one (1) potentiometer, wires Procedure: . Select assorted resistors from the fixed resistor component list in Multisin. As you select each resistor value, a default of RX (where X-a number will be displayed by the resistor such as R1- RS) Use Musim to construct Figure 1. (NOTE Musim must always have a ground connection in order to operat 1080 THE Figure 1-Five resistors selected in Multisim with DMM Record the value of the resiston labeled R3-85 in the Measured Value column of the table Next record the color code for each resistor in the Resistor's Color Code column of the table. This will be a four band color code. The last band will be determined in the next STEP Determine the tolerance of each resistor as described on each component by the color of its band. A gold band represents 5%, a silver band represents 10%, and no band represents 20% tolerance. Add the color band for tolerance to the first column to complete the four band color code of each resistor. Record the stated tolerance of each resistor in the Tolerance column in the table. . The following formula would be used to calculate the NError of an actual (REAL) resistor using the following formula where Nominal is the color code value of a resistor and Measured would be the value displayed by the DMM %Emar (Nominal-Measured)/Nomin100% Note: In some cases the measured valve can be larger than the nominal value which would result in a negative percentage. Just take the absolute value to always report a positive percentage Next select a linear variable resistor from the component list in Multisim and set the value to be 10. Construct the circuit shown in Figure 2. . . . R1 ŠIOKO 10% Key-A Figure 2-Measuring a potentiometer As shown in Figure 2, the DMM will display the resistance of the wiper with respect to circuit ground. Adjust the potentiometer to display 50%. Measure the resistance from ground to the center (wiper arm) terminal of the potentiometer. Change the position the position on the potentiometer slide. You should observe the resistance value change on the DMM. Modify the circuit of Figure 2 to include a second DMM that will measure the resistance between the wiper and the top terminal of the potentiometer. Design a circuit in Multisim that will allow measurement of the total resistance of a SkQ fixed resistor connected in series to a 10k potentiometer so that the total resistance range will be 5k0-15k0. File Upload: Submit the Multisim design file and completed table via Moodle. Resistor's Color Code (Record four color bands) Red-Violet-Orange-Silver Coded Resistance (D) 27k O Tolerance (8) 10% Maximum Coded Resistance (2) 27k+2.7k= 29.7k(Q) Minimum Coded Resistance (12) Measured Resistance (22) 27k-2.7k 24.3k(2) 25.1 k Resistor in Tolerance YES +
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