Application of Op-Amp

Engineeering Projects
circuit of summing amplifier

What are the application of op-amp (operational amplifier)? Op-Amp may perform numerous mathematical operations; hence the name operational amplifier. We here consider some of the applications of Op-Amp. Thus, consider the ideal inverting Op-Amp of figure 1 with voltage shunt feedback through Zf. Equation 1 may be used to secure various operations as analog inverter and paraphase amplifier, scale changer, phase shifter, analog adder, current-to-voltage converter etc.        …..(1) Analog Inverter and Paraphase Amplifier: In Figure 1, Let Z1 = Zf, then AVf = -1 and V0 =…

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Resistance Capacitance Coupled or R.C. Coupled Amplifier

Engineeering Projects
tywo stage CE R.C. coupled amplifier

Resistance Capacitance Coupled or R.C. Coupled Amplifier Figure 1 gives the circuit of a two-stage common emitter R.C. coupled amplifier while figure 2 gives the circuit of a two-stage common source (CS) FET R.C. coupled amplifier. Typical component values are also indicated. In both amplifier circuits of Figure 1 and 2, X1 and Y1 are the input and output terminals of the first stage. The output at Y1 is coupled to the input X2­ of the second stage through a coupling capacitor Cb2. This capacitor serves another function of blocking…

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VU Meter Circuit using ATmega32

Engineeering Projects
sound VU meter using ATmega31

A Volume Unit (VU) meter is a standard device that represents the signal level in audio equipment. This project “VU Meter Circuit using ATmega32” makes the representation process much easier since it avoids the use of any physical medium to establish the connection between the audio equipment or audio source and the circuit of the project. This way we can eliminate the hassle of using more components. It uses a bar graph LED for a visual representation of the audio. ATmega32 is an 8-bit AVR (Alf and Vegard’s RISC processor,…

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Automatic Fence Lighting with Alarm

Engineeering Projects
automatic fence lighting circuit with alarm

Today, in this article we are going to teach you how to make an automatic fence lighting circuit with an alarm using op-amp 741 and timer IC 555. Fence lighting is used for security purposes and can be used at various places like door alarms, pathway alarms, etc. where monitoring is required. Various types of fence lighting circuits are already available over the internet but the problem with that circuits is they required high precision alignment. To overcome this problem, we designed a very sensitive automatic fence lighting circuit. We…

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Laser Based Communication Link

Engineeering Projects
laser based communication link transmitter circuit

Communication is an essential part of our daily life. The project; “Laser-Based Communication Link” allows people at a distance of around 500 meters to communicate wirelessly through a laser. Various other laser-based projects posted on bestengineeringprojects.com are:- (a) Speech Communication using Laser (b) Mini Laser Turret (c) Laser Voice Transmitter Circuit The project unlike other wireless media uses laser light from the transmitter torch as a carrier instead of RF signals used in the conventional system. At the receiver end, the phototransistor should be aligned in a line of sight position…

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50+ Verified Electronics Projects with PCB Layout

Engineeering Projects
verified electronics projects

Verified Electronics Projects: Those practicing the art of engineering are concerned with numbers in all phases of their work. One area where the numbers become overwhelming is in the area of electronic projects and their parts. Although the integrated circuit (IC) has been a boon to the electronics engineers/hobbyists, the sheer number of parts almost requires the user of the electronic project to have research assistance as an associate, to be sure all electronic projects are available have been considered for use. Valuable time is often spent poring over the…

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Motor Controller Circuit for Washing Machine

Engineeering Projects
motor controller circuit for washing machine using 555

Washing machines have been an important part of our daily life. But, the issues we have to deal with in a few months of using them make it more difficult. Previously, we had already posted the Automatic Washing Machine control circuit. It is because most of the washing machines have a single-phase motor incorporated in the system and the timing and direction of the motor are controlled by an external mechanical switch which gets worn out so easily and is not economical on the other hand. And, the project “Motor…

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Inverting Operational Amplifier with Voltage Shunt Feedback

Engineeering Projects
basic circuit of inverting operational amplifier

The ideal inverting operational amplifier with voltage shunt feedback from output terminal to the inverting input terminal feedback impedance Z­f and with non-inverting terminal grounded configuration is shown is figure 1. 25+ verified electronics projects using op-amp 741. Description Inverting Operational Amplifier with Voltage Shunt Feedback This forms the basic inverting op-amp. It is “Inverting” because our signal input comes to the “-” input, and there has the opposite sign to the output. The feedback arrangement used here forms the voltage shunt feedback. Hence as per theory of feedback amplifiers,…

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Multiplexed 4 LCD Display using Arduino UNO

Engineeering Projects
interfacing of 4 lcd using arduino

Liquid Crystal Displays (LCD) are activated by an AC signal across s selected display segment; this feature is included in the LCD module itself. In addition to the standard data input, there is also a display frequency input terminal. The circuit “Multiplexed 4 LCD Display using Arduino UNO” can drive most LCD display. This circuit is used in auto dash board displays, panel meter, wall and table clocks, calculator. In this article we are going to show, how to make 16×8 display using four 16×2 display by using common data…

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Cascading of Amplifier Stages

Engineeering Projects

What is Cascading of Amplifier Stages? A single stage of amplifier can provide only a limited current gain or voltage gain. Most of the applications require much higher gain. Hence, we usually use several amplifier stages connected in cascade i.e. connected such that the output of one stage becomes the input to the next stage. Thus, a multistage amplifier or cascade amplifier may provide a higher voltage gain or current gain. Cascading of amplifier stages is usually done to increase the total gain of the amplifier. However, sometimes cascading is…

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