Transistor level implementation of karaoke machine with 6 band graphic Essay - 1

Transistor level implementation of karaoke machine with 6 band graphic equalizer - Essay Example The project, entitled "Transistor Level Implementation of Karaoke Machine with six-band Graphic Equalizer," aims to develop a transistor-based, Karaoke-type amplifier that is able to run from the mains power supply and consists of the following elements: 1. a 12-V regulated power supply, 2. two inputs: a microphone and a line input, 3. a Common-emitter mixer/preamplifier stage, 4. a six-band graphic equalizer stage, 5. a Common-emitter voltage amplifier stage, 6. a Common-collector power amplifier stage, and, 7. a loudspeaker output; as indicated in the schematic diagram below. Figure 1. Project Schematic Diagram Circuit Design and Operation Power Supply Power supplies, as defined by Howard (1998), are electronic circuits, basically composed of four sections: transformer, rectifier, filter, and regulator, designed such that an input ac signal is converted to dc, at any desired level. Shown below is a block diagram of a basic power supply. Figure 2. Basic Power Supply Block Diagram Th e input line voltage is either stepped up or stepped down by the transformer, depending on the application; in this case, a step-down transformer, T1 rated at 9.5Vac (10.5Vac on actual testing), was used, giving a peak voltage of 14.84V (Vp = 10.5 x ?2), and allowing the device to run from the mains power supply. In addition to that, the power supply is being isolated by this section from the power line. The rectifier section, specifically a full-wave bridge rectifier D1, then converts the resulting signal, still ac, to a pulsating dc, which is made purer by a simple capacitor (C18) filter section, giving a dc hold capacitor peak voltage of 13.44V (Vp – 2(0.7) = 14.84 – 1.4). This leaves enough voltage overhead for the final section, the 12V-regulator IC1 (LM7812) that maintains output at a constant level of 12V and about 1.3A continuous, regardless of changes in load current and/or input line voltages. This configuration has minimum power loss, and negates the need fo r a heat sink on IC1. The capacitor C19 removes any spikes from the regulator for a smoother output. Howard (1998) Mixer/Preamplifier When a combination of two or more audio signals is expected in a single output, simply connecting the inputs will result to the degradation of system efficiency and poor overall performance due to impedance mismatches of different signal sources and the amplifier input. Furthermore, the differing signal amplitudes of the sources, too, presents another problem since direct connection may result to higher-amplitude inputs obliterating the weaker inputs, and even worse, damage the sources. By isolating inputs and providing independently variable gains at each of these inputs, an audio mixer eliminates both dilemmas aforementioned, allowing input signals to be blend in the desired ratio. (Gibilisco, 2002) Shown below is a sample circuit of a simple transistor-based two-channel mixer/preamplifier. Figure 3. Transistor-based Two-channel Mixer/Preamplifier I n this project, two signals, one from a microphone (J1) and another from a line input (J2) are to be mixed. Potentiometers (R1 and R4) were utilized as volume controls for each channel, adjusting the amount of signal passing from the inputs, from a maximum of the entire signal (Rmicin = R1||R3||RQ1in = 10k||10k||2.3k = 1.58kohm, Rlinein = R4||RQ1in = 10k||2.3k

Bio capital in India Essay Example | Topics and Well Written Essays - 3000 words

Bio capital in India - Essay Example There is a reconfiguration of the relationship of imperial power to colony into one of the vendors to the client. 1.3 Indebtedness Indebtedness is found at all levels and especially in interactions between corporations and their investors (1). Even entrepreneurs are indebted to the venture capitalists and are forced to relinquish control over their companies. Consumers also remain indebted to the biotechnological and pharmaceutical industries for undertaking high-risk, decade-long drug development ventures for therapies for otherwise untreatable diseases. This indebtedness is the symbolic capital for the industry. Thus indebtedness operates at multi-level even in India, observes Rajan. When India was in the midst of a crisis in 1991, it was suggested that India take further loans from IMF which would put India into a further state of indebtedness. The terms of the loan made India more fiscally responsible for the debts. A stage was thus created for moral reforms. Chapter 2 2.1 Biocap ital in India The strategic articulations of India do not resist the global orders of techno-scientific capitalism. Rajan has tried to establish a relationship between global capital and local forms of indebtedness. He has shown the ways in which touches down in different contexts in India. ICICI Knowledge Park in Andhra Pradesh and the Genome/Wellspring Hospital, Mumbai are the two locations where Rajan concentrated as both there are institutions and they represent the political ecologies within which they are situated.

Managing foreign exchange risk Essay Example | Topics and Well Written Essays - 1750 words

Managing foreign exchange risk - Essay Example This sort of currency disparity amongst the loans of the financial organizations and the assets by which the organizations are funded result in a huge risk where, if at all, the local currency of the nation in which the organization functions reduces against the U.S. Dollar, then the finance organization will be burdened with a substantially huge obligation of liabilities. This paper delineates the efficacious management of Foreign Exchange Risks with regards to hedging. Moreover, we would be able to seek a practical and a prolonging solution to it by applying an affiliation between the private sector and the benevolent communes to quintessentially conquer a chief hurdle which presently holds back the private sector from facilitating risk management assistances to the financial organizations. ... For many years, the South African Development Community has been subjected to poor grain harvests, when the government of both the countries tended to import grains at high prices. Concurrently, the foreign exchange of South Africa witnessed a gradual increment in the trading values of its cereals raising a positive flag for the likelihood of hedging regional import prerequisites (Dana et al, 2006). The hedging of imports can easily be accomplished by means of future contracts and associated financial options. The buying of elongated positions resolves the consequent SAFEX amount basis which construes to the fact that hedging, by bringing into use these instruments alone in unable to defend against the transformations in transport costs and economic costs for the reason that all of them may tend to vacillate widely. This results in a significant element of risk. As a result, the hedging schemes and replication results delineate that hedging by means of various futures or options may appear to increase the import costs with time passing by, which results in reduced inconsistency and likely producing lower standard prices. These advantages augment only if hedging is brought into implementation when domestic prices are at less than the import equivalence and also, if at all the hedge is powered. Nevertheless, there are chances for problems to stay as intra-regional transport prices stay elevated (Dana et al, 2006). A

Biography on Andrea del Verrocchio Essay Example | Topics and Well Written Essays - 1250 words

Biography on Andrea del Verrocchio - Essay Example However he won a place among the most competent and well known and excellent artists that seemed to be accepted and known as to be masters on their fields of works. He was young when he studied science and geometry. Be a goldsmith on his early years, he mastered the field over other older goldsmiths. In San Maria del Fiore at Florence, he worked for a cup which was very well-known to all goldsmiths. The cup’s body was designed by abstract shapes, and images of leaves and animals. In 1477, Verrocchio was known to all through his merits and reputation. He was then employed to work for the altar of S. Giovanni. He was asked by the art of merchants to do silver works for the altar. Thereafter, he acquired much appreciation and reputation. Meanwhile, at Rome, the Pope’s chapel’s silverworks were destroyed and they do not have yet those large apostles on around the altar of the chapel until Verrocchio was sent for them by Pope Sixtus to work on the silverworks for the Pope’s chapel. Verrocchio was an excellent goldsmith and he has done several well-known silverworks that were used by influential people on his time. However, Verrocchio decided to leave his being a goldsmith to try sculpture when he saw ancient statues that were sculptured excellently at Rome. One of such was place by the Pope at Lateran, the famous bronze horse. Accordingly, he abandoned his being a goldsmith. He left his silverworks and then he took up sculpture and began by carving little bronze figures and began casting little bronze figures. His trial being a sculpture immerged to excellence when his bronze-works were admired by fellow sculptures and several people in Rome. Verrocchio was encouraged by this; he then decided to work figures out of marble. His very first work using marble was done for a sarcophagus of a rich man’s wife. The rich man found the tomb excellent and considerable; the rich man was then encouraged by influential people to place his wifeâ €™s tomb in the open space of Minerva. Upon his return to Florence, he brought with him his earned money, fame and honor. He was inspired by the admiration and much appreciation by the people for his works. Thereafter, he did some marble-works for Madonna in S. Croce. It was then placed above the tomb of M. Leonardo Bruni' of Arezzo. Verrocchio also did metal replicas of the heads of Alexander the Great and of King Darius. The heads were like a fancy head whose character was emphasized though crests and armor design. The metal heads, admired by Lorenzo de' Medici, was later sent to the king of Hungary, Matthias Corvinus.  Verrocchio, having earned a reputation and much admiration as an excellent master on different fields, made the tomb of Giovanni and Piero di Cosimo de' Medici in San Lorenzo. As years passed, Verrocchio realized that he could not be higher than what he has in his sculptures and his previous works; though he was admired, his thirst for much appreciation and r eputation prevails. He was thinking that he has not excelled because of some comparisons among the accepted masters and other rivalries among his fellow sculptures. By this, he turned his time and eager attention to painting. To start with his painting, Verrocchio did some sketches of a battle of nude figures which he later plans to do in a wall but with colors. He also made some cartoon characters, and made some pictures as model. At Venice, Verrocchio made

Amazon Research Survey Background Paper Example | Topics and Well Written Essays - 500 words

Amazon Survey Background - Research Paper Example Usability of Amazon was very simplified. The customers only needed to enter the title or any other relevant information of the book or the product they wished to buy. Amazon then searched its internet database and displayed the most relevant titles of the book or item. The customer was then expected to fill in the credit card payment details after which the item would be shipped and delivered to the customer’s location (Layton, 2008).Within two years time, Amazon becomes a public limited company offering 3 million shares common stock of share-subscription. The IPO was offered in 1997 (Doyl, 2008). Another growth area of the Amazon is successful â€Å"Association program† which was established in July 1996. The program allowed people to choose their own web site advertising on the book of interest. Amazon then allows customers to buy the book even when the book is featured in a different website. As the Customers buys the book through Amazon, which takes care of all orde rs, the associate website makes 3% to 8% commission from the books sold on their website (Bellomo, and Elad, 2006).Amazon expanded its business through acquisition of three groups in early 1998. Two of the companies made it possible for Amazon to expand its business operations to European markets.  Bookpages is one of the largest online retailers in the UK, which provided Amazon.com access to the U.K market.

Impact of National Culture on Organisational Culture Literature review

Impact of National Culture on Organisational Culture - Literature review Example While Johns (2006) stated that national culture restricts the disparity in the culture of the organisations (Martocchio, & Liao, 2009, p. 4). It is important that organisations around the world should know certain parameters on which cultural difference is based. Cultural differences can be a matter of concern as well as can be advantageous for the organisations. Its effect can have a greater impact on the productivity and functioning of the organisations in global market. The effects of differences between national culture and organisational can may be functional and dysfunctional depending on the situation. As far as dysfunctional effect of culture is considered, innovation and change is affected and group thinking is encouraged (Aswathappa, 2010, p. 176). Literature Review Organisational Culture is the cooperative encoding of the brain that differentiates people from a particular organisation from people belonging to some other organisation. National Culture on the other hand can be defined as the cooperative encoding of the brain that differentiates people of a particular group from the people belonging to other group (Hofstede, n. d). It is believed that culture is a concept but still the forces created in the situations related to organisation culture are said to be powerful. The difference between national and organisational culture may affect an organisation but on the hand it is also noted that there is a strong linkage between national and organisational culture. Moreover, organisational culture derives from national cultures. This signifies the advantage lying in organisational culture being derived from national culture as it would create a better understanding of the working culture in the host country. But, disadvantage associated with it also cannot be denied as the true culture of organisation is subjugated in presence of national culture. Newman & Nollen (1996) have put forth the theory saying managing business with one best possible method is a wrong assumption. Cultural differences in different countries emphasises on different management practices by organisations. Diversity in the culture of organisation and the host country is a sensitive issue. Organisations around the world face challenges in diversified environment with different cultures. Different people have different religious beliefs, come from different ethnic groups, and belong to different countries and most importantly cultural difference. The complexity and the differences that arise between organisational and national culture gives rise to entities which are beyond expectation. It is believed that national culture’s impact on employees is higher than the impact of organisational culture. Every organisation develops a culture of its own in the process of evolution as a global player. Organisational culture development becomes all the more important to overcome the problems related to adaption in external environment. Globalisation on the other han d has made organisations improved entities and their cultures have made significant influence on the employees and their work culture. It is believed that multinational organisations have strong culture to overpower the impact of national culture, thereby helping multicultural people to assimilate in a team (Saiyadain, 2003, p. 262). National cultures cannot be neglected as they have considerable

Accounting Essay Example | Topics and Well Written Essays - 500 words - 39

Accounting - Essay Example Performance can be measured by using the financial measures. The measures give the financial indicators such as profits and growth. By using profit figures, a manager can easily tell whether their organization is performing or not. Profits are indicators of performance while loses will be used to indicate non-performance. Another way in which the balanced scorecard can be used to measure performance is through analyzing its innovation reports. By using the company’s ability to respond to changes and make new products, then one can easily tell its competitive nature. Because the scorecard gives parameters used to show success, meeting the parameters will imply that the company is performing. The customer perspective in the balanced scorecard can also be used to measure performance because it is linked to customer satisfaction. The tool can be used to analyze whether the customers are served on time, whether products are affordable and of quality. Coming up with the answers will be used as a performance indicator. The score card can as well be used as an appraisal tool in evaluating employee performance. The balance scorecard has four main perspective, the customer perspective, the innovation and learning perspective, the internal business perspective and the financial perspective (Kaplan & David, 1992). The customer perspective focuses on customer needs, the internal business perspective dwells on important internal operations, the financial perspective relates to profits and market share while the innovation perspective focuses on the ability to create new products. The internal business operations relates to the customer perspective in that, it is through analyzing the internal operations that the customers’ needs will be satisfied. The operations perspective requires that the managers establish what they have to excel in so that they can be able to meet the needs of the customers. The internal operations also relate to the