Design Exercise Essay Example | Topics and Well Written Essays - 5000 words

Design Exercise - Essay ExampleThis necessities the use of a public address system(PA). The PA system requires special design as they must be tailor made to meet the clients specifications and wants. It is therefore needful to design the PA systems using an organized procedure such as the Pahl and Beitz method. The offshoot involves the surveying of the customers needs and wants, generating some demands and wishes from the client, developing of the solution using a function analysis matrix and finally developing the product using the tuition from the demands and the function analysis. After the development of the product, it is tested for its overall suitability particular in satisfying the customers wants and needs, if the product is found unsuitable or with some limits, it is necessary to redesign and reconfigure the product to ensure that it satisfy the customer needs and promotes usability engineering and ergonomic principles.The power supply This is the system that supplies t he public address unit with galvanising power that is used to run the whole PA system. The most common types power supplied include the alternating current (AC) and the direct current (DC). Most PA system use direct current while most of the commercially available power is in form of AC supplied at 240 Volts or cx volts. Rectifier unit or DC adapter This adapter is used for the conversion of AC power to DC power. Some of the PA systems incorporate this gadget at bottom the systems while others have the same system incorporated outside as a separate unit The amplifier unitThe amplifier unit is used for amplification of the share signal. The amplifier receives low power electrical signal and amplify the signals to high power and voltage which is fed to the loud speaker systems. Amplifier uses the transistors, MOSFET devices, field effects transistors (FET), CMOS and operational amplifiers electrical circuit to provide gain to the input signal. The microphone unit The microphone u nit is used for changing voice sound to an electrical signal that can be amplified by the amplifier. Upon receiving the sound signal, the crystal microphone vibrate generating a small electrical current that is fed to the amplifier The mixer The mixer is used for signal conditioning, this helps is unequivocal the voice produced by the amplifier unit. The mixer enhances the audibility of the sound