Applying voltage using the Analog Discovery's Voltage instrument to a diode to produce light.
Utilize the Analog Discovery's Voltmeter instrument to measure voltage in a circuit.
Using the Analog Discovery's arbitrary waveform generator to apply a time-varying signal to an LED to make it flash on and off. This project builds off of the previous Analog Discovery material.
Use the arbitrary waveform generator on the Analog Discovery to apply sinusoidal and swept sinusoidal voltages to a speaker.
Use the arbitrary waveform generator on the Analog Discovery to create frequency modulated signals and apply them to a speaker. This project builds off of the previous Analog Discovery material.
Use the Analog Discovery to play back .wav files through the speaker included in the analog parts kit. This project builds off of material presented in previous Analog Discovery projects.
Use the Analog Discovery's ability to import "custom" waveforms from a file.
Use the Analog Discovery's ability to create "custom" waveforms according to a mathematical function.
Introduces the Analog Discovery's Oscilloscope instrument. Explains the basics of the ways in which voltages are acquired and displayed by the oscilloscope.
The Arbitrary waveform generator instrument will be used to apply relatively rapidly varying wave forms to the oscilloscope, and then triggering of the waveform will be used to make the waveform easier to view and analyze.
How to use some of the most basic and common oscilloscope tools to simplify the measurement process.
Introduces the use of the math channel function on the Analog Discovery. This function allows the user to perform a wide variety of mathematical operations, all of which can be applied to the voltages being measured.
Use the Analog Discovery to plot the voltage-current characteristics of a light emitting diode.
Acquiring vibration data from the piezoelectric sensor from the analog parts kit.
This experiment introduces the Analog Discovery's™ voltage instrument. The voltage instrument provides fixed +5V and -5V voltages.
In this exercise, we will apply voltage to a diode to produce light—the type of diode we will use is called (reasonably enough) a light emitting diode, or LED. When the voltage difference across the LED exceeds the threshold voltage of the LED, current flows through the LED and light is emitted. The physical appearance of LEDs is as shown in Fig. 1. The anode and cathode on a physical LED can be distinguished by identifying some specific characteristics; the anode pin is longer than the cathode pin and the cathode side of the plastic diffusion lens is typically slightly flattened. You will need to download Digilent's® WaveForms™ software for the Analog Discovery projects if you do not have it already.
We will also use a resistor in our circuit. Resistors are commonly used to limit the current in a circuit. In our case, the resistor is used to limit the current to levels which do not exceed the allowable current delivered by the Analog Discovery. Alternate use of current-limiting resistors is to protect components—if the voltage across a diode is too large, excessive current can flow through the diode and the diode can burn out.
Our overall circuit will be constructed using a solderless breadboard. Breadboards provide a convenient way for us to create and modify electrical circuits.
Qty | Description | Typical Image | Schematic Symbol | Breadboard Image |
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1 | LED | ![]() |
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1 | 100Ω resistor | ![]() |
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Use V+ to apply 5V across the LED to light it up.
Connect V+ (red wire) to the 100Ω resistor.
Connect the 100Ω resistor to the LED anode.
Return to the WaveForms main window.