where XL = ωL is the inductive reactance‚ XC = 1/ωC is the capacitative reactance‚ R is the resistance‚ and ω = 2π f ( f is the linear frequency). Apparatus • PC with DataStudio installed • Science Workshop 750 USB Interface Box • Power Amplifier • Voltage Sensor • AC/DC Electronics Lab Board • LCR meter • Connecting patch cords Experimental Procedure The experimental procedure can be divided into three parts: Part I: Using a Frequency Scan to Determine the Resonance Frequency
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Author: Haoyang Chen Date: 2/23/2013 Experiment No.: 2 Title: Synthesis - A Square Wave‚ a Musical Note and Sound Cancellation Introduction: In this experiment‚ we will do three parts to find out the synthesis sound. They are a Square Wave‚ a Musical Note and Sound Cancellation. For the first part‚ it is the superposition of sine wave. We are going to construct a square wave (approximately) by adding together some pure tones of different frequencies. This stretched string vibrating at
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suit different needs. Passive stage monitors have external amplifiers and are less costly to replace if they fail‚ as the power amp does not need to be replaced if only the monitor fails. Passive monitors are often preferred for venues with installed sound systems. Powered or active stage monitors have amplifiers built right into the cabinet. This is useful for musicians who have to supply their own monitors. Having the speaker and the amplifier in one enclosure makes it a more portable option compared
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IEEE SENSORS JOURNAL‚ VOL. 12‚ NO. 3‚ MARCH 2012 439 Film-Type Sensor Materials PVDF and EMFi in Measurement of Cardiorespiratory Signals— A Review Satu Rajala and Jukka Lekkala Abstract—In this paper‚ some recent results obtained with filmtype sensor materials polyvinylidenefluoride (PVDF) and electromechanical film (EMFi) are presented. The materials generate a voltage when they are mechanically deformed‚ however‚ because of their capacitive nature only the change of an external force
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causes a change of 100 micro amp in the base current. Find the input resistance of the transistor. a)3kohm b)4kohm c)2kohm d)5kohm 3. The phase difference of ______________ between the signal voltage and output voltage in a common emitter amplifier is known as phase reversal. a) 180 b) 90 c) 0 d) 360 4. A FET is a three terminal semiconductor device in which current conduction is by one type of carrier i.e_______________ a)electrons b)holes c)electrons or holes d)none 5. Substrate
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Alcohol breathalyzer circuit using 8051 microcontroller. Three digit display 1 of 9 http://www.circuitstoday.com/breathalyzer-circuit-using-8051 Home Forums Datasheets Lab Manual Testing Components Buy Project Kits Custom Search admin June - 5 - 2013 0 Comments Alcohol Breathalyzer circuit using 8051 microcontroller (AT89S51). This article is about a breathalyzer circuit using 8051 microcontroller which outputs the blood alcohol content (BAC) from the breath. The BAC is displayed in percentage
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the sensor‚ A/D and D/A conversion and power amplifier. tected by the position sensors and converted into signals of standard voltage. Then compared with the setting value‚ the error signal enters the controller. After A/D conversion‚ the controller processes this digital signal according to a given regulating rule (control arithmetic) and generates a signal of current setting. After D/A conversion‚ this current signal enters the power amplifier‚ whose function is to maintain the current value
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Welcome to the P920 Symbology Lesson 1 Version 14-01‚ Mr. Raun Watson‚ DTAC‚ 913.684.2422 Symbology Welcome to the P920 Preparatory Symbology Lesson. This is your introduction to or review of US Army Symbology. This lesson consists of eight sections dealing with operational terms‚ military symbols‚ and specific symbols for units‚ individuals‚ organizations‚ equipment‚ installations‚ activities‚ control measures‚ tactical mission tasks‚ and task organization composition. While these sections do
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oscillation is the same. Near a node‚ the oscillation amplitude is small. In this experiment‚ the lab requires an audio amplifier capable of driving a heavy-duty 8-ohm loudspeaker. This amplifier is used to produce standing waves in wires of various linear densities. The required tension is supplied by hanging appropriate masses from the wires. After a string is attached to the amplifier and hung on a weight at the opposite end‚ the lab is ready to begin. First‚ start of by using a fixed length of string
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input channel from DC to AC coupling. The latter resulted in a vertical shift that filters the DC Offset so that the signal centers vertically on the 0 axis. Part 2 of the lab was to measure the response of an amplifier. To meet this goal‚ a DC Power supply generated a signal to an amplifier which was measured and compared to the direct DC signal by the oscilloscope. The output of the power supply was varied from -12 V to +12 V in increments of 2V and the direct signal was compared to the amplified
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