2,297
edits
Changes
Jump to navigation
Jump to search
Line 12:
Line 12: − + − + Line 93:
Line 93: + Line 107:
Line 108: − + Line 141:
Line 142: − + − + + + − Part 1: Connect a DC power supply to the input and set it to 10V. Slowly adjust the potentiometer to determine how much voltage and current is needed to turn on the LED. Measure the voltage and current using the digital multimeter. − [[File:E W Circuit Pic.jpg|400px|thumb|right]] Line 152:
Line 153: − + − + − + − +
→Documentation
|Is used in domain=Electronics
|Is used in domain=Electronics
|Has function=Measurement
|Has function=Measurement
|Has icon=File:Electronics Workstation.png
|Has icon=File:Electronics Workstation 2.png
|Has icondesc=Oscilloscope graphic
|Has icondesc=Oscilloscope graphic
|Has image=File:Electronics Workstation.png
|Has image=File:Electronics Workstation 2.png
|Has imagedesc=Electronics Workstation
|Has imagedesc=Electronics Workstation
|Has description=Standard electronics measurement and signal generation equipment.
|Has description=Standard electronics measurement and signal generation equipment.
One of the first things we need to understand about the oscilloscope is what it’s actually showing on the display screen. The display is set up like a standard Cartesian coordinate system. (you know, a graph...){{#evu:https://www.youtube.com/watch?v=sIlNIVXpIns|graph}}
One of the first things we need to understand about the oscilloscope is what it’s actually showing on the display screen. The display is set up like a standard Cartesian coordinate system. (you know, a graph...){{#evu:https://www.youtube.com/watch?v=sIlNIVXpIns|graph}}
[[File:Oscilloscope Controls.jpg|400px|thumb|right|Oscilloscope Controls]]
The units of the graph tell us a lot about what we are looking at. The y-axis is voltage, and the x-axis is time. So, an oscilloscope will show—in real time—how a voltage signal is changing over time. One key skill we need to learn when using the oscilloscope is to manipulate the scales of the x-axis and y-axis so that you can see the voltage signal clearly and meaningfully on the oscilloscope’s display.
The units of the graph tell us a lot about what we are looking at. The y-axis is voltage, and the x-axis is time. So, an oscilloscope will show—in real time—how a voltage signal is changing over time. One key skill we need to learn when using the oscilloscope is to manipulate the scales of the x-axis and y-axis so that you can see the voltage signal clearly and meaningfully on the oscilloscope’s display.
There are 4 BNC jacks are on the bottom row of the oscilloscope’s control panel. Each one corresponds to channels 1, 2, 3, and 4. This is where you will plug in the probes that will measure various voltage signals in your circuit. Let’s discuss the knobs and buttons under the VERTICAL section of the control panel. For CH 1, the POSITION knob will move the signal on the display screen of the oscilloscope up and down the y-axis. This is handy when there is a DC voltage offset applied to the AC signal. The VOLTS/DIVISION knob will stretch or shrink the y-axis so that you can see the waveform’s amplitude properly. If the peaks or troughs of the waveform are hitting the top and/or bottom of the display screen, use the VOLTS/DIVISION knob to shrink the y-axis so that the full waveform can be seen. The CH 1 MENU button allows you to set up the probe properties and measurement displays for channel 1. The MATH MENU button allows you to perform operations between channels such as subtracting CH 2 from CH 1.
There are 4 BNC jacks are on the bottom row of the oscilloscope’s control panel. Each one corresponds to channels 1, 2, 3, and 4. This is where you will plug in the probes that will measure various voltage signals in your circuit. Let’s discuss the knobs and buttons under the VERTICAL section of the control panel. For CH 1, the POSITION knob will move the signal on the display screen of the oscilloscope up and down the y-axis. This is handy when there is a DC voltage offset applied to the AC signal. The VOLTS/DIVISION knob will stretch or shrink the y-axis so that you can see the waveform’s amplitude properly. If the peaks or troughs of the waveform are hitting the top and/or bottom of the display screen, use the VOLTS/DIVISION knob to shrink the y-axis so that the full waveform can be seen. The CH 1 MENU button allows you to set up the probe properties and measurement displays for channel 1. The MATH MENU button allows you to perform operations between channels such as subtracting CH 2 from CH 1.
==Digital Multimeter==
==Digital Multimeter==
[[File:DMM Controls.jpg|400px|thumb|right|Digital Multimeter Controls]]
A digital multimeter can measure a host of electrical properties including DC voltage and current, AC voltage and current, resistance, continuity, frequency, period, dB, dBm, True RMS AC+DC, and diode testing.
A digital multimeter can measure a host of electrical properties including DC voltage and current, AC voltage and current, resistance, continuity, frequency, period, dB, dBm, True RMS AC+DC, and diode testing.
==Demonstration==
==Demonstration==
[[File:E W Circuit Diagram.jpg|400px|thumb|right|Demo Circuit Diagram]]
[[File:E W Circuit Pic.jpg|400px|thumb|right]][[File:Resistor-color-chart.png|400px|thumb|right]]
Set up a breadboard with a 10kΩ potentiometer as a voltage divider. Connect an LED's anode (the longer leg) to the wiper of the potentiometer. Connect a 560Ω resistor to the cathode (the shorter leg), and connect the other side of the resistor to ground. See the demo circuit diagram to the right for reference.
Set up a breadboard with a 10kΩ potentiometer as a voltage divider. Connect an LED's anode (the longer leg) to the wiper of the potentiometer. Connect a 560Ω resistor to the cathode (the shorter leg), and connect the other side of the resistor to ground. See the demo circuit diagram for reference.
[[File:E W Circuit Diagram.jpg|400px|thumb|none|Demo Circuit Diagram]]
Part 1: Connect a DC power supply to the input and set it to 10V. Slowly adjust the potentiometer to determine how much voltage and current is needed to turn on the LED. Measure the voltage and current using the digital multimeter.
Part 2: Disconnect the DC power supply from the input and connect the function generator to the input. Connect the oscilloscope probes to both the input and output of the potentiometer to display the waveforms. Set the function generator to a sine wave to turn the LED on and off. Experiment with a DC offset and a square wave.
Part 2: Disconnect the DC power supply from the input and connect the function generator to the input. Connect the oscilloscope probes to both the input and output of the potentiometer to display the waveforms. Set the function generator to a sine wave to turn the LED on and off. Experiment with a DC offset and a square wave.
[[File:E W Oscilloscope Screen.jpg|400px|thumb|none|CH 1: Function generator signal to the input. CH 2: Output of the circuit measured at V2]]
[[File:E W Oscilloscope Screen.jpg|400px|thumb|none|CH 1: Function generator signal to the input. CH 2: Output of the circuit measured at V2]]
====User Manuals====
====User Manuals====
[[Media:1651A DC Power Supply.pdf|1651A DC Power Supply Manual]]
[[Media:1651A DC Power Supply.pdf|1651A DC Power Supply User Manual]]
[[Media:4017A Function Generator Manual.pdf|4017A Function Generator Manual]]
[[Media:4017A Function Generator Manual.pdf|4017A Function Generator User Manual]]
[[Media:TDS 2024 Oscilloscope.pdf|TDS 2024 Oscilloscope Manual]]
[[Media:TDS 2024 Oscilloscope.pdf|TDS 2024 Oscilloscope User Manual]]
[[Media:2831E Digital Multimeter Manual.pdf|2831E Digital Multimeter Manual]]
[[Media:2831E Digital Multimeter Manual.pdf|2831E Digital Multimeter User Manual]]
==Safety==
==Safety==