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Vibration SensorVibration Sensor

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Introduction :Introduction :- -

O ne of the most important sensors used in our projectO ne of the most important sensors used in our project

however, its simplicity .however, its simplicity .

O ur vibration sensor is aO ur vibration sensor is a p iezoelectric film device.

P iezo film is an interesting sensor to interface with P arallaxP iezo film is an interesting sensor to interface with P arallax

microcontrollers for examplemicrocontrollers for example.

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P iezo Film sensor :-

General Descri p tion:

P iezoelectricity, Greek for " PRE SSUREPRE SSURE " electricity.

Transducer material that converts one form of energy into

another, and are widely used in sensing applications.

generate electrical charge when mechanically

deformed.

The sensitivity of piezo film as a receiver of mechanical

work input is awesome.

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Connecting u p :

The circuit shown allows to start using theP iezo film as a switch or shock detector.

This circuit is perfect for detecting an impactamong low-level vibrations.

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DCDC--DC ConvertersDC Converters

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Introduction :Introduction :- -

A DC-to-D C converter is anelectronic circuitelectronic circuit which convertsa source of direct current (DC)

from one voltage level to another.Step-down - A converter where outputvoltage is lower than the input voltageLike a Buck converter.

converting the 12 24 V typical batteryvoltage in a laptop down to the fewvolts needed by the processor.processor.

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Usage:Usage:

electronic devices oftencontain several sub-circuits,each with its own voltage levelrequirement different from thatsupplied by the battery.

We also used DC to DC convertersto regulate the output.

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Interface Bus

Interface Bus

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What is a bus ?!!What is a bus ?!!

In the early 1970's,Hewlett- P ackard came outwith a standard bus (H P -IB) which later was adopted

by the IEEE in 1975.

This is known as the IEEE Std.488-1975.

The H P -IB specification permits up to 15 devices tobe connected together in any given setup.

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Automotive Interface BusesAutomotive Interface Buses

Companies began competing in designing their own bustechnology with rates and cable lengths properties thatmatch the Variety of applications .Example on these interfaces is LINLIN

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O ne of the well know serial communication methodfor computers and devices.

Its fame came from its immunity against noise &itsawesome specifications .

M ax distance 1200 m1200 m .M ax number of devices is 3232 .M ax speed at 12 m is 3535 M bsM bs .

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N etwork topology:N etwork topology:

N etwork topology is probably the reason why RS485RS485 is nowthe favorite of many interfaces in data acquisition and controlapplications . As, it is capable of internetworking multipletransmitters and receivers in the same network.

That with an interface which does not require intelligentnetwork hardware: the implementation on the software sideis not much more difficult than with RS232. It is the reasonwhy RS485 is so popular with computers, P LCs, microcontrollers and intelligent sensors in scientific and technical

applications.

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Usage in our project :Usage in our project :- -

Bus in any communication systemis much like artery in human body.

interconnection between blocks

of our project is made through this busconcept .