2-channel pc based oscilloscope
TRANSCRIPT
2-Channel PC Based 2-Channel PC Based OscilloscopeOscilloscope
Project Members:-
Arun SharmaArun Sharma
Annu KarirAnnu Karir
Anjali GargAnjali Garg
Apurv AgarwalApurv Agarwal
Project Guide:- Mr. Vipul BhatnagarProject Guide:- Mr. Vipul Bhatnagar
What is an Oscilloscope?What is an Oscilloscope?
Oscilloscope is an Electronics test instrument used for the purpose of analyzing the constantly varying voltage waveforms.
What is a PC-Based What is a PC-Based Oscilloscope?Oscilloscope?
A PC-Based Oscilloscope is just like the conventional oscilloscope, but it uses a PC to display the output waveforms.
Why we need a PC-Based Why we need a PC-Based Oscilloscope?Oscilloscope?Data Acquisition method is
inexpensive as compared to the Conventional Oscilloscope.
PC’s are common today.Portable in size.Signals can be stored and
processed later.No need of additional power
supply for PCB.
Steps Involved in the Steps Involved in the Development of the Project?Development of the Project?
Some Important Components Some Important Components (IC’S) used in Designing (IC’S) used in Designing Hardware?Hardware?PIC18F2550 microcontrollerMCP6S91Programmable Gain
AmplifierLF353 Dual Operational AmplifierICL7660 Switched-Capacitor
Voltage Converter4MHz Crystal OscillatorUSB Socket for PCB
Circuit for this ProjectCircuit for this Project Microcontroller
Input Chann
els
Voltage Shifting
Amplifier
PCB Layout of the Circuit:-PCB Layout of the Circuit:-
Short Description onShort Description on PIC18F2550 Microcontroller?PIC18F2550 Microcontroller?
32Kbyte of Flash Memory.
2Kbyte of RAM.256 byte of
EEPROM.USB 2.0 Compliant
Microcontroller.Support Speed from
1.5Mb/s to 12Mb/s.
Short Description of Other Short Description of Other Components UsedComponents UsedMCP6S91
Programmable Gain Amplifier from Microchip Technology.
Used to drive A/D Converter & Analog input of PIC Microcontroller.
It can provide gain from 1:1 to 32:1. It is cheap and easy to use. These amplifier’s accept only positive signals
that’s why a voltage shifting amplifier LF353 are used at each channel.
LF353
This IC has two operational amplifiers.
Op-Amp A is used as “Voltage Shifting Amplifier”.
Op-Amp B is used as “Voltage
Followers”.
Features of LF353:-
JFET Operational Amplifier. Input-Offset is Internally Compensated. Wide Bandwidth. Low Input Bias and Offset Current.
ICL7660
It is a Switched-Capacitor Voltage Converter. It can invert, double, divide and multiply the
+ve i/p signal.
In our project this IC is just use to provide symmetrical
negative supply to PIN-4 of LF353.
Software Used in this Software Used in this Project?Project?“Express PCB” Software for
designing PCB layout.MPLAB IDE along with MPLAB C18
is used for programming the Microcontroller.
The Final Graphical User Interface will be designed in any of the following programming languages:
MATLAB/Visual Studio/Visual Basic.
Further Steps Involved:-Further Steps Involved:-
Step1- Designing PCB, and mounting Components on it.Step2- Interfacing Hardware with PC.Step3- Development of GUI.Step4- Testing and Debugging of Project.
Limitations of this Limitations of this Oscilloscope?Oscilloscope?It can effectively process the
signals up to 10kHz.Input Signals applied must be in
the range of -16V to +16V.
These points must be followed while
operating the device.
Thank You!Thank You!
Any Any Query???Query???