speed control of fan using diac and triac pdf ....etc

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Hi am Mohamed i would like to get details on fan regulator using diac and triac or scr ..My friend Justin said fan regulator using diac and triac or scr will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc ....etc

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Submitted by
ALVASIM P. A.
ANUMOL R.
GEO JOY
NIMMY YESUDAS
PRADEEP K. VIJAYAN

MET’S SCHOOL OF ENGINEERING
MALA, THRISSUR DISTRICT

ABSTRACT

Remote controlled Fan Regulator is one of the applications of electronics to increase the facilities of life. Fan is one of the unavoidable Electronic equipment in our day today life. It has become essential element without which people can’t lead a smooth life. The presence of a fan in ....etc

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Output relay Back-EMF Protection



Description

When an electric lock is de-energised, the collapsing magnetic field produces energy to be
generated within the windings of the coil. This energy produces a voltage (or EMF) within the
coil, of the opposite polarity to the normally applied voltage used to energise the magnet.
This ‘back-EMF’ can result in hundreds of volts and can cause damage to the switching relay,
as it sparks across the contacts.
It is normal practice to install a diode, or bridge ....etc

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The features of this device are:
5 speed fan regulator, Digital display, Timer, Low temperature shutdown switch and also a Buzzer
This circ uses PIC 12F675 from Microcchip and CD D4026 (De cade Counters/Dividers +
Decoded 7 Segment Display Outtputs).


How to Operate
As IR pulses are received, circuit will count up an the increase of fan speed. speed can be controlled from 0-5.current. The seleection of the user is displayed on seven segment display also for convenience.

Timer mode:
To enter timer mode go to 6 ....etc

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Like all magazines, we retouch images removing wrinkles in fabric, stray hairs, a few zits, random bra straps but we never alter the way the girls on our pages really look. It crucial that we represent girls of all shapes, sizes, and skin tones for their real beauty. Our Body Peace Project is one of the cornerstones of our mission: We want every girl to stop obsessing about what her body looks like and start appreciating it for what it can do! While we work hard behind the scenes to make sure we being authentic, your notes made me realize that ....etc

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Hi,
I'm doing a private project with an Atmega 16 related to Heating Control. One part is the speed control of a fan. I intend to use a MOC3043 together with a Triac. My problem is: how I have to control the MOC3043 input? With PWM/CTC? I assume that the control signal sent to the MOC have to be synchronized with the 230V AC voltage, to be able to trigger the Triac correctly, but how?

Hints how to solve are highly appreciated.

Best regards

Erwin ....etc

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IMPLEMENTATION OF DSP BASED SENSORLESS CONTROL WITH
DIRECT BACK-EMF DETECTION METHOD FOR BLDC MOTOR

ACKNOWLEDGEMENTS
I am greatly indebted and respectful to my supervisor and advisor, Dr. K.S. Rama Rao,
for his guidance and support throughout the completion of this thesis. His rigorous
attitude to do the research and inspiring thinking to solve problems are invaluable for
my professional career.
I would like to express my heartfelt thanks to Dr Soib Taib for his time and
efforts he spent as my co-supervis ....etc

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IMPLEMENTATION OF DSP BASED SENSORLESS CONTROL WITH
DIRECT BACK-EMF DETECTION METHOD FOR BLDC MOTOR

ABSTRACT
This thesis presents a back EMF sensing scheme, direct back EMF detection, for
sensorless Brushless DC (BLDC) motor drives with a DSP based controller. Using this
scheme, the motor neutral voltage is not needed to measure the back EMF. Instead the
method utilizes the high-speed A/D converter channels, which are available on a DSP
controller. The true back EMF of the floating motor winding is detecte ....etc

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Design and Construction of a Remote Controlled Fan Regulator
Abstract
The paper presents a simple design and implementation of a remote controlled fan regulator. It enables the user to operate a fan regulator from approximately 10 meters away. The remote transmits a tone using an infrared light-emitting diode. This tone is decoded by a receiver, since the receiver only switches when the tone is received. The system was broken down into simpler functional blocks namely; infra-red transmitter, infra-red sensor, signal ....etc

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