ABSTRACT Ultrasonic range finder using 8051 A simple ultrasonic range finder using 8051 microcontroller is presented in this project. This ultrasonic rangefinder can measure distances up to 2.5 meters at an accuracy of 1 centi meter. AT89s51 microcontroller and the ultrasonic transducer module HC-SR04 forms the basis of this circuit. The ultrasonic module sends a signal to the object‚ then picks up its echo and outputs a wave form whose time period is proportional to the distance. The microcontroller
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Compass Project Final Report By Carson Bell February 2013 ECT295L Applied Project Lab DeVry University – Online Presented to Professor John Golzy Abstract The purpose of this paper is to explain how to build a digital compass and program the pic16f72 microchip‚ which will result in a fully functional directional compass. Additionally‚ I will discuss how I then modified the circuit board‚ as well as the software‚ in order for the digital compass to display arrows that point North when
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Sometimes I can’t help asking myself‚ what’s the matter with our plant? Distinct seasons has gone forever‚ the summer temperature refresh the annual historical limit‚ 2012 is the hottest year of United States of America since meteorological records in 1895‚ the annual average temperature is 12.94 ℃‚ breaking the record in 1998. The polar ice and snow ice accelerate to melt at the speed of 8% for every year‚ obviously we suffer global temperature warming‚ It’s predicted if the earth’s surface temperature
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radio signals. Rectifiers may be made of solid state diodes‚ vacuum tube diodes‚ mercury arc valves‚ and other components. When only one diode is used to rectify AC (by blocking the negative or positive portion of the waveform)‚ the difference between the term diode and the term rectifier is merely one of usage‚ i.e.‚ the term rectifier describes a diode that is being used to convert AC to DC. Almost all rectifiers comprise a number of diodes in a specific arrangement for more efficiently converting
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rectifier with R‚ RL and RLE load. Aim of the Experiment: To simulate 1 – φ half wave uncontrolled rectifier with a) R load b) RL load c) RLE load. And plot input voltage waveform‚ output current waveform‚ output voltage waveform and voltage across the diode. Software Required: (a) Windows Xp or above (b) Matlab 7.0 or above (c) Simulink 2.0 or above Theory: This is the simplest type of uncontrolled rectifier. It is never used in industrial applications because of its poor performance. In a single-phase
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This paper reports the latest technological advances made by the Industrial Technology Research Institute (ITRI) in flexible displays‚ especially the flexible substrate‚ thin-film transistor (TFT) backplane‚ and active matrix organic light-emitting diode display. Using the leading cholesteric liquid crystal technology of ITRI‚ we develop a rewritable‚ environmentally friendly thermal printable e-paper. The epaper‚ devised to reduce traditional paper consumption‚ achieves a high resolution of 300 dpi
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Literature Search Both Design 2 and Design 3 circuits uses the concept of voltage doubler rectifier in particular the Greinacher voltage doubler rectifier‚ where the components used are mainly capacitors‚ diodes. Light emitting diode (LED) and 3-turn coil are also incorporated into Design 2 and Design 3 circuits. There are two main reasons of using a voltage doubler rectifier. Firstly‚ the LED require a forward voltage of 1.7V to 2.2V‚ and the 3-turns coil on the implant will not be able to pick
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bulb (or in our case‚ a diode bulb) and to demonstrate how long the electricity generated from the citrus fruits would last. Citrus fruits are said to be acidic and have negatively charged particles that create acid on our bodies. Citrus fruits are one of the best sources of electricity because of its negatively charged particles. These particles from the citrus fruits would travel through the wire in order to light up the diode bulb. III. Hypothesis a) If the diode bulb is connected through
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Figure 7-10 PEAK DETECTOR CIRCUIT A peak detector circuit is a series of diodes and op amps (operational amplifier) connected with capacitor in series fashion to store and hold the peak values given by voltage supply. This circuit will store the highest value or peak value of the given voltage or hold the last given peak voltage to the circuit from the voltage supplier. Peak detector converts the Ac voltage to DC voltage and reduces the disturbance. The function can be explained as follow
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paper by d.visalatchi Wireless Charging of Mobile Phones Using Microwaves contents: 1. abstract 2. introduction 3. transmitter design 4. receiver design 5.process of rectification 6. sensor circuitry 7. conclusion 8. references ABSTRACT : With mobile phones becoming a basic part of life‚ the recharging of mobile phone batteries has always been a problem. The mobile phones vary in their talk time and battery stand by according to their manufacturer and batteries. All these
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