Circuits Lab Report

Posted by Winnie Melda on October 15th, 2018

INTRODUCTION TO NI ELVIS

Objective

The laboratory experiment aims at equipping students with knowledge of building circuits using the Prototype Board and connecting them to the NI ELVIS.

Procedure

The various equipment required for the experiment are; NI ELVIS Workstation, 1.0 kΩ resistor, and Digital Multimeter.

It was ensured that before the start of the experiment the NI Elvis board power was “off,” and then connections were made as shown in the figure 2.a below on the NI-ELVIS prototyping board. The “S” stands for the positive variable voltage source, “A” stands for the NI ELVIS ammeter and the “V” stands for the dc voltmeter on the external DMM.

The next step was to turn on the NI ELVIS following a series of steps as listed below;

Switched on the computer, the NI-ELVIS workstation, and the NI-ELVIS prototyping board in that order.

Then in a sequential order, launched the NI-ELVIS Instrument Launcher, the NI-ELVIS DMM instrument and set it to measure DC voltages, the NI-ELVIS VPS instrument, the NI-ELVIS FGEN instrument and the NI-ELVIS Scope instrument.

Then the variable source voltage was set to 10 V. For all the connections, the currents were measured and recorded from the NI-ELVIS DMM and measured the voltage from the digital multimeter in TABLE 2.1 below.

The next phase was to turn the NI ELVIS power off so as to change the circuit connections.

Then steps b-d for the circuits were repeated as shown in the figures 2.b through to 2.g. +5.0 volts or VPS were used from the bottom left-hand side of the NI ELVIS prototyping board as source S.

The experiment then progressed to an III.THEORY to the utilization of an oscilloscope. The NI-ELVIS scope was used to measure time-varying voltages across two series-connected resistors. The VI-ELVIS supplied the time-varying voltage whereas the NI-ELVIS DMM measured the values of the two resistors. 

After recording the values of the two resistors, the following were connected;

1)    The oscilloscope probe to the oscilloscope channel on the Elvis front panel and then the probe switch was set in the x1 position.

2)    The oscilloscope b on the ELVIS breadboard to bananas a and b, and then the spring or alligator clips when plugged into bananas a and b were used as the input to oscilloscope channel b.

3)    The functional generator output on the Elvis breadboard to the breadboard strip and ground to the breadboard strip.

4)    The channel a probe to measure the voltage across R1 and the channel b spring or alligator clips to measure the voltage across R2.

The figure below shows the connection made.

Figure 2.h: Circuit Diagram for Oscilloscope Experiment

The NI-ELVIS FGEN then got started and set the front panel manual switch to off position, set the DC offset 0 V, set the frequency 60 HZ, adjust the peak amplitude 2V, adjust the square wave, and finally set the tuning ultrafine.

The run button was then clicked.

The function generator display showed frequency close to 60 Hz, and the NI-ELVIS scope started. The NI-ELVIS scope was set as follows;

1)    Channels a and b on measure on for both channels

2)    Trigger, analog sync out

3)    Coupling: dc

The run button was clicked together with the auto scale on both channels. Two square waves should appear on the oscilloscope display. The measurements got recorded as affixed to the oscilloscope just below the x-y plot for all waveforms.

The following was performed, and the findings were reported;

a)    The time-base setting was varied.

b)    The vertical scale setting was also varied.

c)    Lastly, the vertical position setting was varied.

The three settings were then used for channels a and b so that only one full cycle of all the waveforms was shown across the display horizontally, each waveform filled half or less of the display vertically, and channel a is in the upper half of the display and channel b is in the lower half.

The entire process was repeated for 500Hz. 1.5 V triangle wave and I kHz, 2.25V sine wave.

Recorded Data

f) R₁= 220 ohms, R₂= 1000 ohms

The required waveforms were obtained as shown below:

Conclusion

The objective of the experiment was attained as students could build circuits using the Prototype Board and connect them to the NI ELVIS by the end of the experiment. The measurement of current and voltage could indicate whether it was an open circuit or a closed circuit. The learners interacted with the desktop proto-board through the control panel in the workstation.  They could launch the DMM panel and build a circuit and undertake both current and voltage measurements.

Sherry Roberts is the author of this paper. A senior editor at Melda Research in affordable term papers if you need a similar paper you can place your order for essay writer services.