Brigham Young University –Electrical & Computer Engineering Dept. 240 Lab08 Jan 2016 dad Page 1 of 9 Lab3 outline ECEn 240 Circuits Laboratory Project Name Lab 3 - Audio Volume Control240 Stereo Block Diagram (Do you think it would be helpful to include this block diagram in the write-up, cut & paste it in) (How about the chassis picture, I would include it but you won’t lose points if you don’t) 240 Stereo chassis
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Brigham Young University –Electrical & Computer Engineering Dept. 240 Lab08 Jan 2016 dad Page 2 of 9 Lab3 outline (Does NOT need to be included in write-up) You will need to find a lab partner to work with the rest of the semester, (2pergroup). During the remainder of this semester's ECEn 240 labs you will design and build a complete working stereo amplifier system (as seen in the figure above), which will include an audio mixer, microphone preamplifier, tone controls, audio power amplifier, power supply, and high fidelity speaker crossover networks. You will accomplish this one block at a time using the principles of design and analysis you learn in ECEn 240 lecture. We hope you have fun while you learn! (Beforeeach Lab, write-up to the Experimental Procedure section) PRELIMINARY PROJECT OVERVIEW Purpose Include in write-up, copy in your own hand writing.The purpose of this laboratory is to design and implement a stereo Master Volume control, which will be a sub-component in your stereo amplifier system. Objectives Include in write-up, copy in your own hand writing.Familiarize with lab equip; Stereo Chassis, DMM, CD player, Power Amp Review & discuss for understanding the volume control ‘Design Specifications’Discuss Line Level Discuss Potentiometers Discuss Ganging Discuss Tapers with plots or graphic representation Discuss Decibels Measure and plot pot resistance at pre-determined settings Demonstrate integrated volume control with a CD player and power amp Draw a schematic Diagram of integrated Vol Control Design Specifications Include in write-up, copy in your own hand writing.Dual channel: left & rightTracking variation: left vrs right, Less than 1dB(≈10%max) Control: single trackingAttenuation: <1dB @ full volume to >60dB @ no volumeInput impedance: (resistance) >600ΩOutput impedance: (resistance) ≤10KΩResponse curve: ExponentialEquipment List Include in write-up, copy in your own hand writing.ECEn 240 chassis CD or MP3 player Lab Power Amp DMM, Power Supply