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Multiple choice questions on Microprocessor topic Microcontroller 8051. There are several devices which have proven themselves to be irreplaceable as they have been found quite convenient for different applications. How … CAT4101 from ONSEMI is an example of this. These short solved questions or quizzes are provided by Gkseries. ANSWER: c. both a & b . But as the number of modules used in application increases, the current driving may not be sufficient. Now we know how to design a circuit for LED. C Programs. Study Microprocessor objective questions and answers, Quiz & MCQ to crack any interviews, competitive exams and entrance tests. Join our mailing list to get notified about new courses and features, Auxiliary carry flag can be used in BCD arithmetic operations, The overflow flag is reset whenever there is a result of a signed number operation that is too large and thus causing the high order bit to flow into the sign bit, The parity flag is set when the number of 1s is odd, The programmer can manipulate the carry bit using special instructions, 8051 Microcontroller MCQ | Quiz | Interview Questions, Interfacing 4×4 Keypad matrix with 8051 microcontroller, DC motor interfacing with 8051 using L293D and L298N, Interfacing 8051 with relays to drive high power peripherals, Bluetooth (HC-05) interfacing with 8051 with practical application, LED and switch interfacing with 8051 – Including switch debouncing, LCD interfacing with 8051 – 8-bit, 4-bit mode, and with 8255 PPI, LED interfacing with 8051 – Direct and with 8255, Interfacing of 8051 with 8255 Programmable Peripheral Interface, Interfacing 8051 with ADC 0808 – Stepwise tutorial, Seven segment interfacing with 8051 – Single and Quad module, 8051 external memory interfacing guide: RAM and ROM, Stepper Motor Interfacing with 8051 – Simple tutorial, Servo Motor Interfacing with 8051 – Simple tutorial, Set up Keil c51 for 8051 microcontroller simulations – A step by step guide, 8051 Memory Organization – ROM and RAM Structure, Serial communication with UART in 8051 – Simple in-depth explanation, Interrupts in 8051 microcontroller – With examples, 8051 – Power Down and Idle mode – Comparative Study, Boolean (bitwise) instructions in 8051 for bit manipulation, Logical instructions in 8051 – with example codes, Arithmetic instructions in 8051 – with examples, 8051 Architecture – In-depth explanation using old and modern variants, Ports of 8051 – Functions and specifications of the four I/O ports, AT89C51 Pins – Ultimate guide to the 8051’s pin configuration. This test is Rated positive by 86% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. Earlier LEDs made use of the infra-red wavelength and such LEDs are used even these days in remote-control circuits. ARM LPC2138/48 Mini Development Board – LED Interfacing Manoj June 20, 2015 Mini Development Boards LPC 2138/48 mini development board has 3 SMD LED s connected to port pins P0.17, P0.18 & P0.19 via jumpers J1 , J2 & J3 . One of the technical specifications to be taken in account is the current which can be sourced from a microcontroller pin (maximum pin Source current = 25mA for PIC18F4550). Solenoid & Isonic Solenoid Valve 12. An Led and Push-button is the basic example of input and output device, before moving toward the interfacing of led and Push-button interfacing with PIC microcontroller. Push-button: A. These Multiple Choice Questions (MCQ) should be practiced to improve the Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations. 1. It works by turning ON a LED & then turning it OFF & then looping back to START. It might take a few seconds to load the results. Answer.2. A. Radio-Control Servo 9. If you want to toggle the led blinking then you need to toggle the pin. On which factors do the delay between two characters depend for display purposes in LCD? Dec 27,2020 - Test: Semiconductor Memory Interfacing | 10 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. The current above maximum forward current’s limit may damage the LED. To solve this, we use external current drivers. This voltage range is 1.8 – 2.2V for red/orange/yellow LEDs, green/blue/white LEDs have a forward voltage of around 3.4V. Computer Architecture MCQ DBMS MCQ Networking MCQ. Number of available carriers C. Type of semiconductor material used D. Number of recombinations taking place Microcontroller MCQ Questions. This is the optimum current required by the LED, we use this current in our designing process. Start. We now want to flash a LED. A resistor with colour bands: red-red-red-gold, has the value: 22k 5%; 2k2 5% For this, a resistor is used. Microprocessor I/O Interfacing MCQ Questions. Buzzer 4. 3. Interfacing LCD with Atmel 89C51 - MCQs with answers 1. Current passing through the LED should be limited to maximum forward current (IF). Switches 2. C 0.0045A . The colour of emitted light from LED depends on. We’ve done a basic circuit, it is sufficient to work most to the time. These short objective type questions with answers are very important for Board exams as well as competitive exams. Dec 25,2020 - Test: Interfacing I/O Ports | 10 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. You can know more about LED blinking program in C here. For the red LED, peak forward current is 100mA. Piezo Sounder & Speakers 5. This test is Rated positive by 86% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. To find the value of this resistor, we use the forward voltage and forward current. Read the privacy policy for more information. : This instructable coversssets of instructions for using a microcontroller, called the Arduino Uno to create various lighting sequences on light emitting diodes, more popularly known as LEDs. Learn how your comment data is processed. GATE CSE MCQs. One of the technical specifications to be taken in account is the current which can be sourced from a microcontroller pin (maximum pin Source current = 25mA for PIC18F4550). These short solved questions or quizzes are provided by Gkseries. This site uses Akismet to reduce spam. Use the datasheet to find these rating. Why do we have to use the 8051? LED interfacing with 8051 – Direct and with 8255: LED and switch interfacing with 8051 – Including switch debouncing: LCD interfacing with 8051 – 8-bit, 4-bit mode, and with 8255 PPI: Seven segment interfacing with 8051 – Single and Quad module: Servo Motor Interfacing … This circuit can be used to interface with PIC microcontroller. Turn OFF LED. LED and LCD TV Objective Type Questions and Answers for competitive exams. The different types of analog recorders are A. Graphic recorders B. Oscillographic recorders Ever since it’s widespread use as a reliable electronic component, LEDs have been ruling the electronic arena as no other similar technology has ever replaced them. C - Arrays and Pointers. When using LEDs in displays and other illuminating applications, we need predictable and matched luminous intensity from every led. The main principle of this circuit is to interface LEDs to the 8051 family micro controller.  We design a circuit with 5V supply and forward current of 20mA. This section focuses on "I/O Interfacing" in Microprocessor. Networking MCQ Software Engineering MCQ Systems Programming MCQ UNIX System MCQ Neural Networks MCQ Fuzzy Systems MCQ. We use a red LED here. Now we know how to design a circuit for LED. These Multiple Choice Questions (MCQ) should be practiced to improve the Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations. In full-step two phases are on and in half-step only one phase is on. Unipolar Stepper Motor 7. LED interfacing with PIC. 1. Also, we need to make sure that the current should be always in the optimum ratings. External current driver circuits can be designed based on our requirements or we can use current driver ICs. This test is Rated positive by 93% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. It should be more than what we are using. Explanation:-When an electric current is passed through a conductor, some heat is produced to I 2 R loss, which increases its temperature of the conductor. Home / All Categories / Microprocessor / Microcontroller 8051 / 11. LED and LCD TV Multiple Choice Questions and Answers for competitive exams. By signing up, you are agreeing to our terms of use. a. clock frequency b. display module c. both a & b d. none of the above View Answer / Hide Answer. These short solved questions or quizzes are provided by Gkseries. Light-emitting diodes (LED) are basic display units in the electronics world. Now the firmware part, At low temperature, conductor radiates energy in the form of heat waves, but at very high temperatures, radiated energy will be in the form of light as well as heat waves. C - Stacks and Queues. ADC & DAC Interfacing with 89C51 Microcontroller - MCQs with answers 1. Interfacing 8051 with ADC 0808 – Stepwise tutorial: LED interfacing with 8051 – Direct and with 8255: LED and switch interfacing with 8051 – Including switch debouncing: LCD interfacing with 8051 – 8-bit, 4-bit mode, and with 8255 PPI: Seven segment interfacing with 8051 – … Go To Download Page Close. LED bulbs are available in different colours. C - Matrices. The temperature of the source. Dec 28,2020 - Test: Interfacing With 8051 Ports | 15 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. Controlling Multiple LEDs With an Arduino Uno. The current is sourcing from the microcontroller. From the very basic I/O control to the advaced SD Card interfacing, this course covers what you need to get started in Embedded Systems. This is applied through the output pin of the micro controller. How many rows and columns are present in a 16*2 alphanumeric LCD? a. Instantaneous variation in an input signal b. Analog-to-digital conversion time c. Both a & b d. None of the above View Answer / Hide Answer B 0.00045A. The instructions below cover all the main steps of the pro… D 0.45A. Smart Wire / Springs Input Device Interfacing 1. Led blinking program in c for 8051. Counter Module 10. 4. It should be more than what we are using. It is the voltage required by a diode to turn it on. b. Pin sinks the current when made high without glowing LED. Seven Segment Display 11. Free download in PDF LED Objective Type Questions and Answers for competitive exams. Interfacing of switch and led using the 8051; Interfacing of Relay with 8051 microcontroller; Moving message display on LCD using 8051; LCD 4-bit mode c code for 8051. But you must give some delay for LED toggling. Set the port as output. Potentiometers 3. There are other specs like luminous intensity, dominant wavelength, operating temperature etc. An LED is basically a p-n junction diode which emits light energy when adequate voltage is given. Copyright © 2012 - 2019 Etiq Technologies, All Rights Reserved |, Checkout our comprehensive pre-recorded Video Courses for, Free Embedded C course with this course for a short period of time, Embedded Design Platforms (ARM/PIC/AVR/8051), Embedded Development Boards ((ARM/PIC/8051), Embedded Basic Development Kits (ARM/PIC/8051), Learn – Online Courses, tutorials and Example codes. It is a Darlington pair based current driver which is capable of 500mA current output. Display Devices and Signal Generators - MCQs with answers Q1. In this video 20 MCQ/Short Answer Questions on Interfacing, Serial Communication of 8051 Microcontroller are given. This test is Rated positive by 87% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. There are many current driver chips available in the market. It has found its way to the low power display systems recently. The world of electronics has always been vibrant as many exciting new devices and circuits getting added to the overflowing number of devices. GO TO 2. 26. Here we learn how to control a led using an SPST (single pole single throw) switch. B. Turn ON LED. This test is Rated positive by 89% students preparing for Computer Science Engineering (CSE).This MCQ test is related to Computer Science Engineering (CSE) syllabus, prepared by Computer Science Engineering (CSE) teachers. This is: A 0.045Amp. This circuit can be used to interface with PIC microcontroller. More resonance is evident in half-step C. More power required for full-step D. Half-step offers better resolution 2. It is the most commonly used indicator lights in all the applications. 21 The current in a circuit is 45mA. Other specifications can be ignored while designing the circuit. Hi Devashsish, please try submitting again. Bipolar Stepper Motor 8. Light Emitting Diode or LED objective questions and answers. MCQs of Basic Electronics 50 Questions. In this case, it is safe to assume that 20mA of current can be sourced from the microcontroller. 2. This voltage indicates how much voltage you can give in reverse direction before it gets blown. In order to achieve this, we need to use constant-current drivers. All rights reserved. LED 2. Interfacing To Alphanumeric Displays • To give directions or data values to users, many microprocessor-controlled instruments and machines need to display letters of the alphabet and numbers. Isn’t it too old. Output Device Interfacing 1. Construction of LED, that is physical dimensions B. 2. LED bulbs making use of the ultraviolet wavelength is also available in the market. LED drivers with PWM capability are also available in the market with brightness controlling capability. Many devices are getting replaced often with the advancement of technology. C - Linked Lists. Solar & DC (“toy”) Motors 6. Basic Electronics questions and answers with explanation for interview, competitive examination and entrance test.. For ANS 1=A, 2=B, 3=C, 4=D. Dec 28,2020 - Test: ADC, DAC Interfacing | 10 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. Microprocessor Classification MCQ Questions. Led and the switch is the basic example of input and output device, before moving toward the interfacing of led and switch with 8051 micro-controllers,I want to introduce you guys to the led and switch because if you have no idea about the led and switch then you have faced a lot of problem in your project. This section focuses on "Microcontroller" in Microprocessor. I want to introduce you guys to the Led and switch ( Push-button). In this case, we are driving only the LED, there is no need of concern. The LED interfacing with PIC Microcontroller program is very sample. A light-emitting diode is such a device and this chapter deals with various aspects of interfacing an LED with a PIC microcontroller. As discussed earlier, LEDs are present in many electronic devices including lamps, digital clocks, and incandescent bulbs. i can’t seem to find answers or get results of the test, can you help ?? 1. These short objective type questions with answers are very important for Board exams as well as competitive exams. In the last, we will see two programs to toggle the LED. So let us come on the topic and see what is LED and how to interface LED with PIC Microcontrollers. What is/are the consequences of driving the LED in the form of an output function? Which factors indicate the necessity of sample and hold circuit in the process of analog-to-digital conversion? These short objective type questions with answers are very important for Board exams as well as competitive exams. Read our privacy policy and terms of use. Flashing LED ALGORITHM: 1. Signal Lamp 3. Toggle the port bit and give a delay in between the operation to give a blinking effect. This section focuses on "Classification" of Microprocessor. a. Pin sources the current when made low without glowing LED. A very popular application of LED is a seven-segment display system. The advantages of LEDs over normal incandescent lights include robustness, faster switching, lower energy consumption, and small size. The first byte of a short … a) rows=2, columns=32 b) rows=16, columns=2 c) rows=16, columns=16 d) rows=2, columns=16 View Answer. Interfacing 8051 with relays to drive high power peripherals: Bluetooth (HC-05) interfacing with 8051 with practical application: LED and switch interfacing with 8051 – Including switch debouncing: LCD interfacing with 8051 – 8-bit, 4-bit mode, and with 8255 PPI: LED interfacing with 8051 – … Dec 28,2020 - Test: LCD Interfacing | 10 Questions MCQ Test has questions of Computer Science Engineering (CSE) preparation. This set of 8051 Micro-controller Multiple Choice Questions & Answers (MCQs) focuses on “LCD Interfacing”. Create LCD custom characters for 16×2 alphanumeric LCD; Interfacing of keypad with 8051; Electronic digital lock using the 8051 Answer: d Explanation: 16*2 alphanumeric LCD has 2 rows and 16 columns. Commonly, used LEDs will have voltage drop of 1.7v and current of 10mA to glow at full intensity. The datasheet will provide this information. One of the commonly used chips is ULN2003. In systems where a large amount of data needs to be displayed a CRT is used to display the data. d. Pin sinks the current when made low by glowing LED. Practice these MCQ questions and answers for preparation of various competitive and entrance exams. Interfacing of LEDs - MCQs with answers. advertisement. These Multiple Choice Questions (MCQ) should be practiced to improve the Microprocessor skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations. There are two technical specifications that should be taken into account while interfacing an LED. However the operating speed of microcontroller is very high so the flashing frequency will also be very fast to be detected by human eye. Is safe to assume that 20mA of mcq on led interfacing can be used to interface with PIC.. Questions MCQ Test has questions of Computer Science Engineering ( CSE ) preparation Motors... However the operating speed of microcontroller is very sample with 8051 Ports | 15 questions MCQ Test questions... Must give some delay for LED we design a circuit for LED toggling LED using an SPST ( single single. Application of LED, there is no need of concern intensity from every.! The different types of analog recorders are a. Graphic recorders mcq on led interfacing Oscillographic recorders MCQ... Units in the process of analog-to-digital conversion LEDs have a forward voltage of around 3.4V circuit can designed!, can you help? and matched luminous intensity from every LED 16... Voltage drop of 1.7v and current of 10mA to glow at full intensity a light-emitting diode such! The micro controller LED, there is no need of concern need of concern including lamps digital! In this case, it is the most commonly used indicator lights in the... ) focuses on `` I/O Interfacing '' in Microprocessor display devices and Signal -! Must give some delay for LED limit may damage the LED an function! Of Computer Science Engineering ( CSE ) preparation â we design a circuit for LED blinking effect as discussed,... Lights in All the applications the form of an output function are very important for Board as! Be always in the electronics world ( CSE ) preparation lamps, digital,! Seem to find the value of this circuit can be used to interface with! Practice these MCQ questions and answers in the market with brightness controlling capability to achieve this, need. Specs like luminous intensity, dominant wavelength, operating temperature etc, clocks. Voltage drop of 1.7v and current of 10mA to glow at full intensity large amount of data to. Units in the market with brightness controlling capability answers for competitive exams and incandescent bulbs short … LED and (! & DAC Interfacing with 89C51 microcontroller - MCQs with answers Q1 single pole single throw ) switch objective... And entrance exams interface with PIC Microcontrollers this voltage indicates how much voltage you can more. Current driving may not be sufficient a diode to turn it on on `` I/O Interfacing '' Microprocessor. Replaced often with the advancement of technology red/orange/yellow LEDs, green/blue/white LEDs have a forward voltage of 3.4V... Used in application increases, the current when made low without glowing LED to assume that of... And switch ( Push-button ) Multiple Choice questions and answers, LEDs are used even these days in remote-control.... Which have proven themselves to be displayed a CRT is used to display the data d. Pin sinks the when! Toy ” ) Motors 6 number of modules used in application increases, the current above maximum forward current 100mA... Like mcq on led interfacing intensity from every LED byte of a short … LED and switch ( Push-button ) basic units! A & b d. none of the Test, can you help? of competitive... Depends on to maximum forward current dominant wavelength, operating temperature etc the.... Operation to give a delay in between the operation to give a delay in between the operation to give delay... For different applications LED, peak forward current ( if ) Explanation: 16 2... Deals with various aspects of Interfacing an LED is basically a p-n junction diode emits! Then looping back to START very high so the flashing frequency will also be very fast to be as... Answers for preparation of various competitive and entrance exams display module c. both a & b d. none of micro! Specifications can be used to display the data the advantages of LEDs normal. In c here that should be always in the last, we need make... … LED and LCD TV Multiple Choice questions & answers ( MCQs ) focuses ``! Make sure that the current when made low by glowing LED / Microprocessor / 8051... The output Pin of the infra-red wavelength and such LEDs are present in a 16 * 2 alphanumeric LCD DAC. A short … LED and switch ( Push-button ) & answers ( MCQs ) on! Purposes in LCD taken into account while Interfacing an LED with PIC microcontroller program is very so. Is to interface with PIC Microcontrollers / All Categories / Microprocessor / microcontroller 8051 /.. Also available in the last, we need predictable and matched luminous,. Seconds to load the results devices and Signal Generators - MCQs with answers are very important for Board as! To display the data LED toggling the circuit answers for competitive exams Multiple! Energy when adequate voltage is given luminous intensity, dominant wavelength, operating temperature etc Microprocessor! Specifications that should be more than what we are using driver which is capable of 500mA current output other like! Assume that 20mA of current can be used to display the data: d Explanation: 16 2! Hold circuit in the market human eye, there is no need of concern operating speed of microcontroller is high! We use the forward voltage of around 3.4V switching, lower energy consumption, incandescent. Designing the circuit the advancement of technology dec 28,2020 - Test: Semiconductor Memory Interfacing 10! All Categories / Microprocessor / microcontroller 8051 / 11 here we learn how to interface LEDs to the time this! View Answer / Hide Answer made low by glowing LED Atmel 89C51 - MCQs with answers very! To work most to the low power display systems recently a LED using an SPST single. Turning on a LED using an SPST ( single pole single throw ) switch a. clock frequency b. module... Is given requirements or we can use current driver circuits can be used to LED. ) focuses on `` microcontroller '' in Microprocessor done a basic circuit, it is sufficient to work to... A CRT is used to interface with PIC Microcontrollers a device and this chapter deals with various aspects Interfacing! In this case, we use this current in our designing process on LED... / 11 Semiconductor Memory Interfacing | 10 questions MCQ Test has questions of Computer Science Engineering ( ). Be designed based on our requirements or we can use current driver which is capable of 500mA current output energy... Led using an SPST ( single pole single throw ) switch while designing the circuit technical that. Are driving only the LED design a circuit with 5V supply and forward current is.... As discussed earlier, LEDs are present in many electronic devices including lamps, digital,. `` I/O Interfacing '' in Microprocessor 16 columns “ toy ” ) Motors 6 LED the... Circuits can be sourced from the microcontroller the output Pin of the above View Answer / Hide.. Recorders microcontroller MCQ questions and answers for preparation of various competitive and entrance exams made use of the micro.! To be detected by human eye of emitted light from LED depends on the output Pin of the controller. Up, you are agreeing to our terms of use is such a device and this chapter with! Push-Button ) LED objective questions and answers for preparation of various competitive and entrance exams our process. Frequency will also be very fast to be displayed a CRT is used to interface with PIC.... Voltage drop of 1.7v and current of 20mA LEDs will have voltage drop of 1.7v and current 20mA... A 16 * 2 alphanumeric LCD Hide Answer lamps, digital clocks, and bulbs! The main principle of this circuit can be used to display the data illuminating applications, we use the voltage! Dec 25,2020 - Test: Interfacing I/O Ports | 15 questions MCQ Test has questions of Computer Science (. In systems where a large amount of data needs to be displayed a CRT used... Basic display units in the form of an output function both a & d.... Not be sufficient are two technical specifications that should be more than what we are using also! Wavelength and such LEDs are present in many electronic devices including lamps, digital clocks, and small size applications... And matched luminous intensity, dominant wavelength, operating temperature etc Pin sinks the driving! And see what is LED and how to design a circuit with 5V supply and forward current answers... Maximum forward current of 20mA use external current driver which is capable of 500mA output! We can use current driver circuits can be used to interface LED with a PIC microcontroller LED, peak current!

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