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Chap 5. Timer 및 Audio Amp. 응용

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Preparation report #5
전기전자응용실험
Chap 5. Timer 및 Audio Amp. 응용
과목명.
전기전자응용실험
담 당.
제출일.
성 명.
1. Introduction
`Chapter 5` experiment is about a timer and an audio amp. According to the direction, I`ll investigate the characteristics and operating principle of a timer and an audio amp. Additionally, I`ll experiment it by connecting to a speaker.
2. Equipments and components
2.1 Timer
- resister : 3㏀ X 2, 1㏀ X 2, 500Ω
- capacitor : 0.02 nF, 1nF, 10nF
- LM555
2.2 Audio amp.
- resister: 1.2㏀, 10㏀ x 3,
- capacitor: 10㎌ x 2, 250㎌, 0.05㎌
- LM386
3. Theory
3.1 Pulse Width Modulation (Monostable mode)
Pulse Width Modulation (PWM) of a signal or power source involves the modulation of its duty cycle, to either convey information over a communication channel or control the amount of power sent to a load.

참고 자료

- datasheet of LM555, LM386, KA22067
- http://en.wikipedia.org/wiki/Pulse-width_modulation
- http://en.wikipedia.org/wiki/Duty_cycle
- http://en.wikipedia.org/wiki/Pulse-position_modulation
- http://en.wikipedia.org/wiki/Audio_amplifier