Design of Smart Lighting and PA System

Design of Smart Lighting and PA System

EE 2031 Mini Project

National University of Singapore

Department: Electrical & Computer Engineering
Course: B. Eng. Electrical Engineering
EE2031 Circuit and Systems Design Lab:
Mini Project
Design of Smart Lighting and PA System

Module facilitators:
Assoc. Prof Chim Wai Kin
Dr Xiang Ning
Mr Loke Yuan Ren
Mr Sangit Sasidhar

Lab Group: Friday_Room1_G2 (9am-12pm)
Tan Kheng Loong A0087979X
Wong Kok Keong A0087415B
Wong Wei Long Andy A0087388J

© 2012 EE2012_Fri_R1_G2

Design of Smart Lighting and PA System

EE 2031 Mini Project

Content List
Page
1. Bill of Materials (BOM)

1

2. Design Outline

2

2.1 Comparator circuit

2

2.2 Sensitivity circuit

2

2.3 LED circuit

3

2.4 Voltage Control amplifier circuit

3

2.5 Volume Detector circuit

3

3. Design Procedure

4

3.1 Sensitivity range

4

3.2 Forward voltage of LED

4

3.3 Gain of Comparator Opamp

5

3.4 Charging and Discharging

5

3.5 Gain of voltage control amplifier circuit

6

3.6 Responsiveness of peak detector

8

4. Design Experiment

9

4.1 Verifying prototype circuit

9

4.2 LDR characterization

9

4.3 Verifying functionality of prototype circuit

10

4.3.1

Smart PA System

10

4.3.2

Smart Lighting System

11

5. Conclusion

© 2012 EE2012_Fri_R1_G2

11

Design of Smart Lighting and PA System

EE 2031 Mini Project

1. Bill of materials
The table below is the bill of materials we have used for the prototype circuit for our system.
Table 1 showing component list used for the prototype circuit
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

Component Description
Opamp
Zener Diode
Diode
Microphone
Speakers
LED
Light Dependent Resistor (LDR)
N-MOSFET
NPN BJT
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor