User Account

All Pages

Programming, Electrical Engineering

Assignment Help:

ELEC 132

COURSEWORK – ADC

This work will be assessed based on program demonstration (during lab sessions) and design. You will also have to submit your c-source codes as word or pdf files through SCOLAR sub-system.
This piece of work contributes 20% towards your total mark.
The final opportunity to demonstrate your program operation is Thursday, March 21.

Introduction

The Digital-to-Analogue Converter (DAC) can be used to perform an Analogue-to-Digital Conversion (ADC) with the aid of a comparator, as explained in Lab 6.


Task1. ADC conversion using RAMP method and P1 output (6 marks).

1.1. Write and test a program which produces an analogue to digital conversion using the RAMP method and outputs the conversion value to the LEDs.
(1 marks)

1.2. Modify the program output to P1 in a way that the LEDs will display the rounded percentage of the full scale output. Since there are 8 LEDs each one represents 12.5%. However, since we want the rounded percentage the LED on the LSB should be illuminated if the voltage is above 6.25% (312mV) and the next LED should be illuminated if the voltage is above 18.75% (937mV) etc…
(2 marks)

1.3. Further modify the program so the output to P1 will include a flashing LED if the percentage is less to illuminate this LED. For example, if the voltage is less than 6.25% of full scale (312mV), LSB will be flushing and the frequency of flashing will increase with increasing the voltage . The next bit (P1.1) will start to flash when the voltage is 12.5% with increasing frequency until fully lit at 18.75%, etc.

(3 marks)


Task 2. Successive Approximation ADC ( 5 marks)

The Ramp method of ADC is simple but can take a long time to complete the conversion. Unlike the RAMP method the successive approximation technique has a fixed conversion time whatever the level of the analogue input. See Lab 6 for details.

?


Write a program to produce analogue to digital conversion using the successive approximation method and output the voltage value into serial port with the accuracy of 1 mV. Try to use bit-wise operators for realising successive approximation.

Task 3. Digital Volt Meter (DVM) (5 marks)

Use any ADC method to simulate a Digital Volt Meter with output to LCD. The upper line of the display should have an appropriate message like “Voltage (mv)” and the bottom line should displays the correct voltage (in millivolts) with the accuracy of 1 mV.

Task 4. Integrated output (4 marks)

Finally, integrate your previous programs to produce all three types of output: to port 1, to serial port and to LCD. The output to serial port should be with the period of 100 ms. Your final program design has to be modulus, therefore, the use of functions will be important.
1

Related Discussions:- Programming

What do you mean by most and least significant digits, Q. What do you mean ...

Q. What do you mean by Most and least significant digits? The MSD (most significant digit) in a number is the digit which represents the largest part of the number. Therefore i

The b-h curve for ferromagnetic materials, Ferromagnetic materials have som...

Ferromagnetic materials have some 'residual magnetism' even when the current (proportional to H) is zero. Material with strong residual magnetism are useful for making permanent ma

Dc charging and discharging circuit, The circuit shown below is a DC chargi...

The circuit shown below is a DC charging and discharging circuit. a.  At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for and .

Earth leakage-earthing, Earth Leakage : Earth leakage takes place when, th...

Earth Leakage : Earth leakage takes place when, through some fault in an appliance or its connections. Electric current escapes to earth i.e. the body of the appliance become 'liv

What is accelerated graphics port, What is AGP? AGP: The latest additio...

What is AGP? AGP: The latest addition for many computer systems is the inclusion of the accelerated graphics port. This AGP operates at the bus clock frequency of the microproc

Obtain a bode magnitude plot for the transfer function, Q. A bandpass filte...

Q. A bandpass filter circuit is shown in Figure. Develop a PSpice program and use PROBE to obtain a Bode magnitude plot for the transfer function ¯H(f) = ¯Vout/ ¯Vin for frequency

Define serial in - parallel out shift registers, Define Serial In - Paralle...

Define Serial In - Parallel Out Shift Registers? For this type of register data bits are entered serially in the same manner as discussed in the last section and the difference

PFC, How do you size power factor units at 11kV

How do you size power factor units at 11kV

Radio hardware, Filters 1. You need to design a lowpass filter with cutoff ...

Filters 1. You need to design a lowpass filter with cutoff frequency Fc= 1MHz. a. What is the minimum filter order required for 30 dB rejection (-30 dB gain) of 10 MHz? b. What is

Single phase meters, Single Phase Meters Single phase meters are commo...

Single Phase Meters Single phase meters are commonly rated for 240 V AC supply; the current ratings are 5/10, 10/20, 2.5/10 or 5/20 A or are for direct connection to the mains

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd