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PALMSCOPE

(IEEE PAPER)

Abstract:-

Palmscope is a type of electronic test instrument that allows

observation of constantly varying signal voltages, usually as a two-

dimensional graph of one or more electrical potential differences using the

vertical or 'Y' axis, plotted as a function of time, (horizontal or 'x' axis).

Although an oscilloscope displays voltage on its vertical axis, any other

quantity that can be converted to a voltage can be displayed as well. In

most instances, Palmscope show events that repeat with either no change

or change slowly.

Palmscope are commonly used to observe the exact wave shape of

an electrical signal. In addition to the amplitude of the signal, an

oscilloscope can show distortion, the time between two events (such as

pulse width, period, or rise time) and relative timing of two related

signals. Palmscope are used in the sciences, medicine, engineering, and

telecommunications industry. General-purpose instruments are used for

maintenance of electronic equipment and laboratory work. Special-

purpose Palmscope may be used for such purposes as analyzing an

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automotive ignition system, or to display the waveform of the heartbeat as

an electrocardiogram.

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INRTODUCTION

In this project we have got two channel that will decode the input

data and with the help of ADC and the signal is processed and given to

the micro controller. The micro controller will read the data and the data

is represented on GLCD. Here we use 128x64 LCD and the data is shown

in a graphical form. There is an select switch used to select the channel.

The data is also stored in the SSD card available. The data at the sametime will be sending to the computer with the help of serial interface. The

input voltage will be scaled to 0 5v scale and will be represented on the

GLCD.

This unit is simple and handy to use. This unit can be run with the

help of battery supply. Hence we can use this as a mobile scope which can

be used to read different signals from different electronic circuit.

This device will be powered by Renesass 16bit R8C/25 family

micro-controller. Renesas is the worlds largest micro controller

manufacturer. Its chips are found in BMWs iDrive and very recently in

Toyota Prius hybrid car..

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BLOCK DIAGRAM

RENESAS R8C MCU

Signals to be

measured 1 Graphical LCD

Multimedia Card (MMC) Serial Interface to PC

Power Supply

Signals to be

measured 2

ADC Channel 2

ADC Channel 1

Select Switch

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COMPONENTS USED

Sl No:- Components Quantity

1 Microcontroller R8c25 1

2 GLCD 128x64 1

3 MMC Card 64MB 1

4 ADC Interface 1

5 Serial Interface(Rs232) 1

6 Power Supply ( 5v, 3.3v) 1 each