We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Nobody downloaded yet

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

Comments (0) Cite this document
Summary
Roberto del Rosario described Karaoke Sing-Along System (Patent No. UM-5269 dated 2 June 1983, Patent No. UM-6237 dated 14 November 1986), which he invented in 1975, as a handy multi-purpose compact machine that incorporates an amplifier speaker, one or two tape mechanisms, optional tuner or radio and microphone mixer with features to enhance one's voice; its name was derived from the Japanese expression for singing along a famous record with the vocals removed, "karaoke"…
Download full paper
GRAB THE BEST PAPER
Transistor level implementation of karaoke machine with 6 band graphic equalizer
Read TextPreview

Extract of sample
Transistor level implementation of karaoke machine with 6 band graphic equalizer

Download file to see previous pages... 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 The 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 for 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 In 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 ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Transistor level implementation of karaoke machine with 6 band graphic Essay - 1”, n.d.)
Retrieved from https://studentshare.org/macro-microeconomics/1422378-transistor-level-implementation-of-karaoke-machine
(Transistor Level Implementation of Karaoke Machine With 6 Band Graphic Essay - 1)
https://studentshare.org/macro-microeconomics/1422378-transistor-level-implementation-of-karaoke-machine.
“Transistor Level Implementation of Karaoke Machine With 6 Band Graphic Essay - 1”, n.d. https://studentshare.org/macro-microeconomics/1422378-transistor-level-implementation-of-karaoke-machine.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Karaoke machine circuit based in transistors+ graphic equalizer
Karaoke amplifier mixes and amplifies both inputs and give out put to a load or speaker. The circuit under discussion consists of an amplifier with 6 band Graphic equalizer. It consists of power supply, mixer / pre amplifier, graphic equalizer and power amplifier stages.
10 Pages(2500 words)Essay
Engineering and Constructions Executive Summary
Karaoke machine is a simple machine that separates the lead vocal from audio and combines the user’s voice to the music. The music file can be of any format. CDs, DVDs and even flash memory drives can be utilized to store a music file. A simple karaoke machine has a music source and an input voice signal through a microphone.
3 Pages(750 words)Essay
Level 6: Empowerment and control
To this end, companies and businesses no longer go about their duties as if they were all that mattered in the trade they are involved in but take into consideration what is happening with other competitors and what is actually going on in the larger industry in which they operate.
6 Pages(1500 words)Essay
Preparation for mentorship essay - Level 3 (FHEQ Level 6)----Political science paper
There has been a major shift in the assessment criteria as it has moved from knowledge assessment towards a more competency and performance based assessment. In
4 Pages(1000 words)Essay
Level 6 Diploma in Careers Guidance and Development
their practices, learning, and reflection in making them adopt critical thinking skills, which are essential for finding solutions to their problems and knowledge production. Notably, reflection helps in bringing about the growth in various aspects. These include growth aspects
14 Pages(3500 words)Essay
Level 6 diploma in career guidance and development
O.F, 2010, Pg.135). Career guidance is a profession that involves a lot of tasks some of which include; assessing the interests of the people, making decisions that suit the peoples’ lives, looking at available training and work
14 Pages(3500 words)Essay
Level 6 diploma in career guidance and development
al psychology, it is said that he majored in the matching, it is further claimed that he suggested that the occupational choice do come to occur when people happen to have achieved the following status. The aforementioned scholar made a key assumption claiming that it is very
14 Pages(3500 words)Essay
Graphic
ous tasks enhances communication between the researcher and supervisor the research must align with the supervisor, department, and institutional academic requirements through the supervisors’ feedback. The action plan also offers a guideline that puts into consideration
1 Pages(250 words)Coursework
Discussion 1 Week 6 Corporate-level Strategies
After watching the video, the new Southwest-AirTran merger and resulting low-cost structure strategy could maximize both companies long-term profitability through attracting more
1 Pages(250 words)Assignment
Diabetes level 6
10). When this occurs, glucose builds up within the body and is not utilized as required by the different body parts leading to symptoms such as excretion of large amount of urine,
7 Pages(1750 words)Essay
Let us find you another Essay on topic Transistor level implementation of karaoke machine with 6 band graphic equalizer for FREE!
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us