AC Motor Speed Controller Circuit Using AT89C51

Engineeering Projects
author prototype of ac motor speed controller

Here is a simple circuit “AC Motor Speed Controller Circuit Using Microcontroller” which is used to control the speed of AC motor using microcontroller At89c51. The circuit uses the principle of changing the firing angle of TRIAC to control the speed of the motor. Here, in this project, we had to use various switches to control the speed whereas an LED bar graph is used to indicate the speed of the motor. Circuit Description of AC Motor Speed Controller Circuit Using AT89C51 The circuit diagram of the signal phase AC…

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Sound detector circuit using op-amp 741

Engineeering Projects
sound detector circuit using 741 IC

The circuit diagram of the sound detector circuit using op-amp 741 is shown in figure 1. The heart of the circuit is op-amp 741 which is used in order to sense the vibrations of sound waves condenser microphones. Introduction of Sound detector circuit using op-amp 741 Sometimes due to lack of concentration and our ignorance, we are unable to hear anything around us. And, that could lead to unfortunate misfortunes which could have been avoided with appropriate precautions. This circuit called ‘Sound Detector’ is what detects vibrations of the sound waves…

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12v, 7Ah Smart Battery Charger with PCB Diagram

Engineeering Projects
circuit diagram of 12V 7ah smart battery charger

Here is a 12V, 7Ah smart battery charger circuit which is also referred to as a smart charger uses three-stage of charging i.e. bulk stage, absorption stage, and float stage. Normal battery charger technology uses single-stage battery charging technology i.e. only charge the battery up to the maximum charging voltage preset by the charging circuit. Now here is a 12V, 7Ah smart battery charging circuit which is also referred to as a smart charger uses three-stage of charging i.e. bulk stage, absorption stage, and float stage. You may also like Arduino…

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9V DC to plus/minus 5V DC converter

Engineeering Projects
circuit diagram of dual polarity 5 v from 9V

Presented here is a simple circuit “9V DC to plus/minus 5V DC converter” that can convert a 9V battery to plus/minus 5V DC supply using LM7805 and ICL 7660. The operational amplifier requires a dual polarity power supply (+Ve and -Ve) because it has to swing on the output i.e. it does not swing into action during the negative cycle of signal if the negative source is not given. Thus, for the proper operation, we need a dual polarity power supply. Circuit Description of 9V DC to plus/minus 5V DC converter While…

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GPS Navigator Circuit using ATmega 16

Engineeering Projects
author prototype of GPS navigator

The system “GPS Navigator Circuit using ATmega 16” is implemented to detect the position/location of anything under consideration, and hence it is suited for navigation activities. Introduction to GPS Navigator Circuit using ATmega 16 The term GPS has been so popular in recent times. The credit for its quick recognition is due to the list of multiple features this system offers. Elaborated as a Global positioning system (GPS) it has already been established as a reliable technology that has made our lives much easier. Just with the involvement of GPS, we…

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Conversion of BCD Number to Binary Number in 8085

Engineeering Projects

/*WAP to convert ten BCD numbers stored at 4350H to binary and store the result at 4360H*/ LXI SP,330AH ;initiate stack pointer LXI H,4350H ;pointer to input table of BCD number LXI B,4360H ;pointer to output table of equivalent binary NEXTBYTE: MOV A,M ;get BCD number CALL BCT_BIN ;call BCTB_BIN conversion subroutine STAX B ;store binary number to output table MOV A,L ;copy reg. L to reg. A CPI 59H ;compare it with value 59H JZ HALT ;if it is 59H, then we have processed 10 ;BCD numbers hence jump…

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Electronic Voting Machine Prototype Using C

Engineeering Projects
Electronic Voting Machine Prototype Using C figure 2

Here, Today we gonna make a simple graphic-based project Electronic Voting Machine Prototype using C, which demonstrates the working of the electronic voting machine. This project shows the working principle, vote counting, and percentage calculation with the color full image. If you wish to make innovative projects either for your knowledge or for college projects, then this project is best for you. This project is tested on TurboC++ on Windows OS. We recommended you use TurboC++ (on window os) to run this project. Check out other interesting projects using C…

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LASER Demonstration Program using C

Engineeering Projects
laser demonstration using C

The objective of the ‘LASER Demonstration Program using C’ is to develop a graphic based system, which demonstrate the working and emission of laser. Here you will find the tutorial to build a LASER Demonstration Program. This project is very helpful to build a basic and experience on Graphics Programming using C. LASER stands for light amplification by simulated emission of radiation. The simulated emission is used for amplifying light waves. LASER light is coherent source. An atom can emit radiation by two different methods: spontaneous and stimulated emission. Characteristics…

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GPS and GSM based Vehicle Tracking System

Engineeering Projects
circuit diagram of GPS and GSM based vehicle tracking system

The project GPS and GSM-based Vehicle Tracking System uses Global Positioning System (GPS) and global system for mobile communication (GSM), which makes this project more economic than implementing a communication system through GPS satellites in a two-way GPS communication system. Introduction to GPS and GSM based Vehicle Tracking System Tracking has now been a recent trend followed everywhere. This process helps us to collect details and at the same time prevent robbery of devices being tracked. The project ‘GPS and GSM based Vehicle Tracking System’ which employs a microcontroller as its…

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Voltage Rating of Capacitors

Engineeering Projects
electrolytic capacitor

What is  Voltage Rating of Capacitors? Voltage rating of capacitors :Capacitor are designed and manufactured to operate at a certain maximum voltage. This maximum voltage can be regard as working voltage (WV). A Capacitor (in other words Condenser) is a passive electrical device that can store electrical energy by accumulating electrons on its metallic surface separate by a finite distance filled with dielectric material like air, Bakelite etc. within the space between metallic surfaces. Nowadays, capacitor is an essential components of each and every circuit that are deign today. Neither…

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