Report: Simple Transistor Circuit
[pic]
PROJECT REPORT
BASIC ELECTRICAL & ELECTRONICS
LAB
(EE-103)
ACKNOWLEDGEMENT
This project report could not have been prepared, if not for the help and encouragement from various people. Hence, for the same reason we would like to thank our guide and teacher CHRISTY A. KOSHY. It was for his support that we
Got proper guidelines for preparing this project.
Submitted to:-
CHRISTY A. KOSHY
DECLARATION
We are the student of ME-Y declares that we have made our project on “BEEE” and it is authentic piece. We have not copied it from any source.
INDEX
INTRODUCTION
➢ CIRCUIT DIAGRAM
➢ HOW IT WORKS
➢ CONCLUSIONS
➢ REFRENCES
INTRODUCTION
The operation is simple. Clap and the lamp turns on. Clap again and it turns off.
The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. It produces a small electrical signal which is amplified by the succeeding transistor stage. Two transistors cross connected as a bistable multivibrator change state at each signal. One of these transistors drives a heavier transistor which controls a lamp.
I built my prototype on a cardboard cover from an old notebook. Punched holes using dividers and placed the components down flat. It might look neater if you draw the circuit diagram on to the board before you begin. A photo is included below. The components are from my junk box and I found that it works even if you omit that 4.7 Megohm resistor. Your results may vary.
The transistor types are not critical and any n-p-n silicon transistors should work.
Circuit Diagram
Sound operated switch using a simple transistor circuit
[pic]
How it works
Input Transducer
The sound of your claps is picked up using an electret microphone. Some people call it by the name "condenser microphone" which usually
PROJECT REPORT
BASIC ELECTRICAL & ELECTRONICS
LAB
(EE-103)
ACKNOWLEDGEMENT
This project report could not have been prepared, if not for the help and encouragement from various people. Hence, for the same reason we would like to thank our guide and teacher CHRISTY A. KOSHY. It was for his support that we
Got proper guidelines for preparing this project.
Submitted to:-
CHRISTY A. KOSHY
DECLARATION
We are the student of ME-Y declares that we have made our project on “BEEE” and it is authentic piece. We have not copied it from any source.
INDEX
INTRODUCTION
➢ CIRCUIT DIAGRAM
➢ HOW IT WORKS
➢ CONCLUSIONS
➢ REFRENCES
INTRODUCTION
The operation is simple. Clap and the lamp turns on. Clap again and it turns off.
The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. It produces a small electrical signal which is amplified by the succeeding transistor stage. Two transistors cross connected as a bistable multivibrator change state at each signal. One of these transistors drives a heavier transistor which controls a lamp.
I built my prototype on a cardboard cover from an old notebook. Punched holes using dividers and placed the components down flat. It might look neater if you draw the circuit diagram on to the board before you begin. A photo is included below. The components are from my junk box and I found that it works even if you omit that 4.7 Megohm resistor. Your results may vary.
The transistor types are not critical and any n-p-n silicon transistors should work.
Circuit Diagram
Sound operated switch using a simple transistor circuit
[pic]
How it works
Input Transducer
The sound of your claps is picked up using an electret microphone. Some people call it by the name "condenser microphone" which usually
References: MADHUR JAIN (E104063) MAHESH GARG (E104064) MANIK SHARMA (E104065) MANJOT SINGH (E104068)