change acoustic energy into electrical energy. The heart sound signal is then processed by preamplifier and amplified to achieve the high gain and filter is used to give the desired audible heart sound which is sent wirelessly using RF module at receiver side. Indeed more than one doctor can play the heart sound and can do auscultation easily. The PC connectivity is also made available so that the captured data can be sent to pc for storage purpose and software analysis using think lab. Video can
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PART II I/O MODULES CHAPTER 7 UART 7.1 INTRODUCTION Universal asynchronous receiver and transmitter (UART) is a circuit that sends parallel data through a serial line. UARTs are frequently used in conjunction with the EIA (Electronic Industries Alliance) RS-232 standard‚ which specifies the electrical‚ mechanical‚ functional‚ and procedural characteristics of two data communication equipment. Because the voltage level defined in RS-232 is different from that of FPGA I/O‚ a voltage
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Asynchronous communication utilizes a transmitter‚ a receiver and a wire without coordination about the timing of just how long the transmiter leaves the signal at a certain level to represent a single digital bit. Each device uses a clock to mesure out the ’length’ of a bit. The transmitting device simply transmits. The receiving device has to look at the incoming signal and figure out what it is receiving and coordinate and retime its clock to match the incoming signal. Sending data encoded
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telephone has been adapted into the vocabulary of many languages. It is derived from the Greek: τῆλε‚ tēle‚ farand φωνή‚ phōnē‚ voice‚ together meaning distant voice. The essential elements of a telephone are a microphone (transmitter) to speak into and an earphone (receiver) which reproduces the voice of the distant person. In addition‚ most telephones contain a ringer which produces a sound to alert the user when a telephone call is coming in‚ and a dial used to enter a telephone number when initiating
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CHAPTER 1 INTRODUCTION 1.1 Company Profile: * HCL is a global technology and IT Enterprise company based in Noida‚ India. The company comprises two publicly listed companies‚ HCL Technologies and HCL Infosystems. * HCL was focused on addressing the IT hardware market in India for the first two decades of its existence with some activity in the global market. * On termination of the joint venture with HP in 1996‚ HCL became an enterprise which comprises HCL Technologies (to address
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reasoning behind how this could produce a signal. We know that electromagnetic radiation is produced by accelerating charges. In the radio transmitter‚ electrons oscillate up and down and are thus accelerating. An electron will exert a force on another electron when they are some distance away‚ like charges repel. When the electron in the transmitter oscillates up and down‚ the direction of the force it exerts changes since the source of the force is moving. It takes some time for the change
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the surface of the human body as a safe‚ high-speed network transmission path. Red Tacton uses the minute electric field generated by human body as medium for transmitting the data. The chips that will be embedded in various devices contain transmitter and receiver built to send and accept data in digital format. In this paper we will discuss about red tacton‚ and it’s working states‚ and applications of red tacton in various fields. And we will compare our red tacton with the other
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RedTacton is a new technology that is completely different from wireless and infrared. A transmission path is formed at the moment‚ when a part of the human body is get contact with a RedTacton transceiver. On separating the ends‚ the contact between the receiver and body‚ ends the communication. Human Area Networking technology that uses the surface of the human body as a safe‚ high speed network transmission path. This technology uses the minute electric field which is emitted on the surface of the human
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Transmitter Testing | Trial 1 | Trial 2 | Does the audio-visual alarm (Buzzer and LED) activate when the voltage was greater than 0.37? | Yes | Yes | Does the solenoid and exhaust fan activate simultaneously when the voltage output reached 1.03? | Yes | Yes | Does voltage decrease after the solenoid and exhaust fan was triggered? | Yes | Yes | | Trial 1 | Trial 2 | Does the receiver displays the same value as the transmitter? | Yes | Yes | Does the audio-visual alarm
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serial-to-parallel conversion. The two streams become the channel 1 and channel 2 messages of Figure 1. Because of the halved rate the bits in the I and Q paths are stretched to twice the input sequence bit clock period. The two messages are recombined at the receiver‚ which uses a QAM-type demodulator. The two bit streams would typically be band limited and/or pulse shaped before reaching the modulator. A block diagram of such a system is shown in Figure 2 below. QAM becomes QPSK: The QAM modulator is so named
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