[전기전자응용실험] Timer and Audio Amp 예비보고서

소개

연세대학교 전기전자공학부 전기전자응용실험 보고서입니다.
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목차

▷ how the experiment would be performed
▷ answer to the question

본문내용

▷ how the experiment would be performed
The purpose of this experiment is to understand usage of timer and audio amp. First we commect regulator`s output to timer(LM555) and buffer. And its out goes to the speaker. So, it`s important to examine datasheets and materials about this experiment before we do this experiment.
Timer`s input is a DAC`s output. And its output is variable frequency oscillation. And we design audio amp buffer. Its input is a timer`s output and its output goes to the input of speaker. And finally, connect the speaker to the timer and the audio amplifier and check if the output aound changes according to the input of the timer.

▷ answer to the question
* 4.1 Timer
① Refer to the datasheet of LM555 and design a circuit that satisfies the circuit specification listed in 6.1 using PSPICE program. Use 555D component.
- we know that , and we know a tendency. In the self running system the modulation charge time is calculated as 0.693. So there is a gap between experiment and theory. But there exists a certain point that we must set up the frequency range in audibility range. So it is in in the abstract. In the schematic duty it cannot be 0.5 because if , it makes circuit break(floating circuit). So typically in datasheet the duty is 0.3. And we will use a register 390㏀ and 300㏀ and 0.1㎋ capacitors and R=1㏀.

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