Fix index and Add link

Author: jeonghye-choi

Diff for: README.md

@@ -1,24 +1,35 @@
 # 컴퓨터 기초 실험
 오픈소스 하드웨어의 핵심인 마이크로프로세서와 그 동작원리를 이해하고, 인터럽트 동작방식과 포트 제어방법, 메모리 응용, I/O프로그래밍, 외부 장치와의 통신 등
 
-### 📙 [마이크로컨트롤러](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/1_%EB%A7%88%EC%9D%B4%ED%81%AC%EB%A1%9C%EC%BB%A8%ED%8A%B8%EB%A1%A4%EB%9F%AC.md)
+## 📙 docs
 
-### 📙 [Arduino 기초 프로그래밍]()
+### 📖 [마이크로컨트롤러](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EB%A7%88%EC%9D%B4%ED%81%AC%EB%A1%9C%EC%BB%A8%ED%8A%B8%EB%A1%A4%EB%9F%AC.md)
 
-### 📙 [디지털 데이터 출력]()
+### 📖 [컴퓨터시스템의 이해](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EC%BB%B4%ED%93%A8%ED%84%B0%20%EC%8B%9C%EC%8A%A4%ED%85%9C%EC%9D%98%20%EC%9D%B4%ED%95%B4.md)
 
-### 📙 [디지털 데이터 입력]()
+### 📖 [아두이노](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EC%95%84%EB%91%90%EC%9D%B4%EB%85%B8.md)
 
-### 📙 [아날로그 데이터 입출력]()
+### 📖 [직렬 병렬 회로](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EC%A7%81%EB%A0%AC%EB%B3%91%EB%A0%AC%ED%9A%8C%EB%A1%9C.md)
 
-### 📙 [OSC와 함수발생기, 주기적처리]()
+### 📖 [디지털 출력](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EB%94%94%EC%A7%80%ED%84%B8%EC%B6%9C%EB%A0%A5.md)
 
-### 📙 [스피커와 센서]()
+### 📖 [String Class와 디지털 입력](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/StringClass%EC%99%80%EB%94%94%EC%A7%80%ED%84%B8%EC%9E%85%EB%A0%A5.md)
 
-### 📙 [7Segment와 Text LCD]()
+### 📖 [아날로그 입출력](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EC%95%84%EB%82%A0%EB%A1%9C%EA%B7%B8%EC%9E%85%EC%B6%9C%EB%A0%A5.md)
+
+### 📖 [데이터 처리 함수](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/docs/%EB%8D%B0%EC%9D%B4%ED%84%B0%EC%B2%98%EB%A6%AC%ED%95%A8%EC%88%98.md)
+
+### 📖 []()
+
+<br>
+
+## ⚙ 부품,장치 & 연결방법
+
+### 💎 [가변저항](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/%EB%B6%80%ED%92%88%26%EC%97%B0%EA%B2%B0%EB%B0%A9%EB%B2%95/%EA%B0%80%EB%B3%80%EC%A0%80%ED%95%AD.md)
+
+### 💎 [RGB_LED](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/%EB%B6%80%ED%92%88%26%EC%97%B0%EA%B2%B0%EB%B0%A9%EB%B2%95/RGB_LED.md)
+
+### 💎 [오실로코프&함수발생기](https://github.com/jeonghye-choi/LAB-Elementary-computer/blob/master/%EB%B6%80%ED%92%88%26%EC%97%B0%EA%B2%B0%EB%B0%A9%EB%B2%95/%EC%98%A4%EC%8B%A4%EB%A1%9C%EC%BD%94%ED%94%84%26%ED%95%A8%EC%88%98%EB%B0%9C%EC%83%9D%EA%B8%B0.md)
 
-### 📙 [모터 등 주변기기 제어]()
 
-### 📙 [시리얼 통신]()
 
-### 📙 [센서 응용]()