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The Rotating Globe Using Atmel Mega163

Introduction For years scientists and scholars alike have been plagued by one common obstacle which, until now, has proven to be impossible to overcome.  How do you find the country you want on a globe?  Sure, the easy answer is to just use the longitude and latitude coordinates, but really, that's quite confusing.  Some may even say to just do a web search to take a look at the country, but this really doe ...

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Fertilizer Feed Rate Controller

Abstract For a final project for EE 476 at Cornell University under the instruction of Bruce Land I designed and built a fertilizer flow rate control unit tailored to the needs of Lin Davidson. Instead of conventional mechanical drive methods, the delivery rate was controlled through the use of an Atmel AT90S8515 microcontroller. Ground speed of the tractor was sensed through the use of a radar unit acquire ...

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Servo motor control using Atmega8 microcontroller

Servo motors are so called “closed feedback” systems. This means that motor comes with control circuit, which senses if motor mechanism is in desired location and if not it continuously corrects an error until motor reaches proper point. Servo motors are widely used in robotics, remote controlled planes, vehicles. So they come in many shapes and sizes, but they operate in almost the same way. Usually Servo ...

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Measuring motor speed and display result on LCD using ATmega8 microcontroller

For measuring motos speed there can Optical interrupter used like H21A1. This is a device where IR LED and photo-transistor is coupled in to plastic housing. The gap between then allows interrupting signal with opaque material and this way switching the output from ON to OFF. This device can be connected to Microcontrollers ICP pin and this way measuring PWM disk (with hole in it) speed can be measured. Dis ...

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How to control Stepper Motor using AT89C51 Microcontroller

As explained in earlier article, Stepper motor is operated by energizing the stator coils in an ordered sequence. When the input sequence of signal is applied to the motor leads, it starts rotating in steps. AT89C51 microcontroller has a current rating of 50mA. It can neither source nor sink huge current. ULN2003 is high voltage and high current Darlington array IC. Each input-output pair in ULN2003 acts as ...

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DC Servomotor Controller System Meter using ATtiny2313 microcontroller

The ATtiny2313-based project is an experiment on the closed loop DC servomotor control system (SMC) by Elm Chan. It can be used for practical use with/without some modifications. The closed loop servo mechanism requires real-time servo operations, such as position control, velocity control and torque control. It will be suitable for implementation to any embedded 32 bit RISC processors as a middleware. To c ...

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Electric Spinning Wheel using ATmega8 microcontroller

The Electric Eel Wheel is a smart electric spinning wheel which helps you spinning the fiber of your choice into yarn easily instead of traditional wheel. This Electric spinner is lighter and smaller, making it easier to take your spinning with you. You can control spinning speed and its direction, forward or reverse. The electronics part of the project consist of DC motor, IC L298 (motor driver) and ATmega ...

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