PPT on 8251 USART(Universal Synchronous Asynchronous Receiver Transmitter)

The 8251 USART is typically used for serial communication and was rated for 19.2 Kilo bits per second signalling rate.It is commonly confused with the much more common 8250 UART that was made popular as the serial port in the IBM Personal Computer.

It has 5 sections:

• read/write control logic
• transmitter
• receiver
• data bus system
• modem control

Contents of ppt:

• INTRODUCTION
• SYNCHRONOUS COMMUNICATION
• ASYNCHRONOUS COMMUNICATION
• BLOCK DIAGRAM
• TRANSMITTER
• RECEIVER
• PIN DIAGRAM
• PIN DESCRIPTION
• APPLICATIONS

PPT:

                                                 


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Ppt on proximity sensors

Proximity Sensors:

Proximity sensors are devices that are able to detect the objects without any actual contact with them.Almost in all the cases a plate of glass or plastic separates them.Although you are likely to touch the separating element,but there is no physical contact with the sensor.

This technology also enables adaptive controls, alleviates isolation issues, improves overall application, robustness , generates almost unlimited design flexibility and fosters new functionalities.

Types of proximity sensors:

• Capacitive
• Capacitive displacement sensor
• Doppler effect (sensor based on effect)
• Eddy-current
• Inductive
• Laser range finder
• Magnetic, including Magnetic proximity fuse
• Passive optical (such as charge-coupled devices)
• Passive thermal infrared
• Photocell (reflective)
• Radar
• Reflection of ionising radiation
• Sonar (typically active or passive)
• Ultrasonic sensor(sonar which runs in air)

PPT:

                                                       

Related posts:Ppt on 8251 USART, Ppt on wave theory prpogation

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