Temperature controlled DC fan is a temperature-based fan.
It can cool the devices by operating a DC fan when the temperature in its vicinity increases above the preset level.
Temperature Based Fan Controller can be used for reducing the power consumption & also to assist people who are disabled and are unable to control the speed of fan.It may also be used for monitoring changes in environment.
esistance thermometers, also called resistance temperature detectors (RTDs), are sensors used to measure temperature. Many RTD elements consist of a length of fine wire wrapped around a ceramic or glass core but other constructions are also used. The RTD wire is a pure material, typically platinum, nickel, or copper. The material has an accurate resistance/temperature relationship which is used to provide an indication of temperature. As RTD elements are fragile, they are often housed in protective probes.
Resistance thermometers are constructed in a number of forms and offer greater stability, accuracy and repeatability in some cases than thermocouples. While thermocouples use the Seebeck effect to generate a voltage, resistance thermometers use electrical resistance and require a power source to operate. The resistance ideally varies nearly linearly with temperature per the Callendar–Van Dusen equation.
The platinum detecting wire needs to be kept free of contamination to remain stable. A platinum wire or film is supported on a former in such a way that it gets minimal differential expansion or other strains from its former, yet is reasonably resistant to vibration. RTD assemblies made from iron or copper are also used in some applications. Commercial platinum grades exhibit a temperature coefficient of resistance 0.00385/°C (0.385%/°C) (European Fundamental Interval).[7] The sensor is usually made to have a resistance of 100 Ω at 0 °C. This is defined in BS EN 60751:1996 (taken from IEC 60751:1995). The American Fundamental Interval is 0.00392/°C,[8] based on using a purer grade of platinum than the European standard. The American standard is from the Scientific Apparatus Manufacturers Association (SAMA), who are no longer in this standards field. As a result, the "American standard" is hardly the standard even in the US.
Lead-wire resistance can also be a factor; adopting three- and four-wire, instead of two-wire, connections can eliminate connection-lead resistance effects from measurements (see below); three-wire connection is sufficient for most purposes and is an almost universal industrial practice. Four-wire connections are used for the most precise applications.
The project is based on electric heating and its method. This project is a college project done by students. So the project might have some mistakes. Use this project as any source is restricted. The project is uploaded only because of the benefits of the students who want to get the basic idea of the powerpoint presentation of a project.
This Presentation can be used by the Students of Engineering who Deals with the Subject INDUSTRIAL INSTRUMENTATION and use it for Refrence (Anyways you Guys will Copy Paste or Download it) ;)
Temperature Based Fan Controller can be used for reducing the power consumption & also to assist people who are disabled and are unable to control the speed of fan.It may also be used for monitoring changes in environment.
esistance thermometers, also called resistance temperature detectors (RTDs), are sensors used to measure temperature. Many RTD elements consist of a length of fine wire wrapped around a ceramic or glass core but other constructions are also used. The RTD wire is a pure material, typically platinum, nickel, or copper. The material has an accurate resistance/temperature relationship which is used to provide an indication of temperature. As RTD elements are fragile, they are often housed in protective probes.
Resistance thermometers are constructed in a number of forms and offer greater stability, accuracy and repeatability in some cases than thermocouples. While thermocouples use the Seebeck effect to generate a voltage, resistance thermometers use electrical resistance and require a power source to operate. The resistance ideally varies nearly linearly with temperature per the Callendar–Van Dusen equation.
The platinum detecting wire needs to be kept free of contamination to remain stable. A platinum wire or film is supported on a former in such a way that it gets minimal differential expansion or other strains from its former, yet is reasonably resistant to vibration. RTD assemblies made from iron or copper are also used in some applications. Commercial platinum grades exhibit a temperature coefficient of resistance 0.00385/°C (0.385%/°C) (European Fundamental Interval).[7] The sensor is usually made to have a resistance of 100 Ω at 0 °C. This is defined in BS EN 60751:1996 (taken from IEC 60751:1995). The American Fundamental Interval is 0.00392/°C,[8] based on using a purer grade of platinum than the European standard. The American standard is from the Scientific Apparatus Manufacturers Association (SAMA), who are no longer in this standards field. As a result, the "American standard" is hardly the standard even in the US.
Lead-wire resistance can also be a factor; adopting three- and four-wire, instead of two-wire, connections can eliminate connection-lead resistance effects from measurements (see below); three-wire connection is sufficient for most purposes and is an almost universal industrial practice. Four-wire connections are used for the most precise applications.
The project is based on electric heating and its method. This project is a college project done by students. So the project might have some mistakes. Use this project as any source is restricted. The project is uploaded only because of the benefits of the students who want to get the basic idea of the powerpoint presentation of a project.
This Presentation can be used by the Students of Engineering who Deals with the Subject INDUSTRIAL INSTRUMENTATION and use it for Refrence (Anyways you Guys will Copy Paste or Download it) ;)
This ppt provides a brief overview on thyristors commonly known as SCRs. V- I characteristics curve, triggering methods, protection methods, series and parallel operations of SCRs, applications are discussed in this slide.
We provide you Project Temperature Sensors – Types.You can choose the best of your choice and interest from the list of topics we suggested. All new project ideas that are appearing focuses to improve the knowledge of Engineering students.
https://www.elprocus.com
Visit our page to get more ideas on Project Report Format for Final Year Engineering Students these ideas developed by professionals.
Elprocus provides free verified electronic projects kits around the world with abstracts, circuit diagrams, and free electronic software. We provide guidance manual for Do It Yourself Kits (DIY) with the modules at best price along with free shipping.
Potentiometers are variable resistance devices. A change in the linear or angular displacement of a potentiometer varies the effective length of its conductor, and therefore the resistance of the device.
Power measurement is a valid technique to measure that how much the power is being transmitted through the entire system.
In this presentation you will estimate and understand the following objectives
Wattmeter as a device
Power measurement techniques
Classical based history
Construction of wattmeter
Working of Wattmeter
Power measurement of direct and indirect way
Power measurement in three phase applications
Applications of Wattmeter
This paper presents an innovative prototype design of electric fan with smart characteristics. This electric fan uses a microcontroller to produce an automation function. It also has a unique double feature designs, such as using 2 fans, 2 Light Emitting Diodes (LED) and 2 sensors. This is to ensure the cooling process operates more efficiently and effectively, especially for a large space application and in hot weather due to global warming. By applying the circuit, it offers a better life for human. It is really practical for senior citizens to make their life simpler. The circuit is also suitable for disabled people who have difficulty to switch on the fan manually. Lastly, the circuit can be manipulated by diversifying its function as a detector, where it can produce an alarm signal when emergency case occurs such as the house or premise is on fire.
Temperature Controlled Dc fan Using op AMP..... And Also With Circuit diagram...AltafHussain381
PROJECT SLIDES FOR TEMPEATURE CONTROLLED DC FAN USING OP AMP.... AMP ARE USED IN THIS PROJECT TO UNDERSTAND THE THINGS ARE USING IN THIS PROJECT FOR WORKING AND ALSO CIRCUIT DIAGRAM...
This ppt provides a brief overview on thyristors commonly known as SCRs. V- I characteristics curve, triggering methods, protection methods, series and parallel operations of SCRs, applications are discussed in this slide.
We provide you Project Temperature Sensors – Types.You can choose the best of your choice and interest from the list of topics we suggested. All new project ideas that are appearing focuses to improve the knowledge of Engineering students.
https://www.elprocus.com
Visit our page to get more ideas on Project Report Format for Final Year Engineering Students these ideas developed by professionals.
Elprocus provides free verified electronic projects kits around the world with abstracts, circuit diagrams, and free electronic software. We provide guidance manual for Do It Yourself Kits (DIY) with the modules at best price along with free shipping.
Potentiometers are variable resistance devices. A change in the linear or angular displacement of a potentiometer varies the effective length of its conductor, and therefore the resistance of the device.
Power measurement is a valid technique to measure that how much the power is being transmitted through the entire system.
In this presentation you will estimate and understand the following objectives
Wattmeter as a device
Power measurement techniques
Classical based history
Construction of wattmeter
Working of Wattmeter
Power measurement of direct and indirect way
Power measurement in three phase applications
Applications of Wattmeter
This paper presents an innovative prototype design of electric fan with smart characteristics. This electric fan uses a microcontroller to produce an automation function. It also has a unique double feature designs, such as using 2 fans, 2 Light Emitting Diodes (LED) and 2 sensors. This is to ensure the cooling process operates more efficiently and effectively, especially for a large space application and in hot weather due to global warming. By applying the circuit, it offers a better life for human. It is really practical for senior citizens to make their life simpler. The circuit is also suitable for disabled people who have difficulty to switch on the fan manually. Lastly, the circuit can be manipulated by diversifying its function as a detector, where it can produce an alarm signal when emergency case occurs such as the house or premise is on fire.
Temperature Controlled Dc fan Using op AMP..... And Also With Circuit diagram...AltafHussain381
PROJECT SLIDES FOR TEMPEATURE CONTROLLED DC FAN USING OP AMP.... AMP ARE USED IN THIS PROJECT TO UNDERSTAND THE THINGS ARE USING IN THIS PROJECT FOR WORKING AND ALSO CIRCUIT DIAGRAM...
The transformation of vitality starting with one frame then onto the next is known as Transduction. A transducer fills
for this need.
A transducer is a device which converts signals from one form to another. This can include loudspeakers and linear
positioned are well as physical quantity to electrical signal devices. The latter are most frequently referred to as sensors.
They allow computers and other electronic devices measure, operate and control things.
We can state that Every transducer is likewise (or has) a sensor yet every sensor requires not be a transducer.
This anti-sleep alarm keeps you awake. This circuit keeps you vigilant by sounding intermittent beeps and emitting flashing light so as to remind you that you are not on the bed but driving a vehicle. It works only at night due to the control of a light-dependent resistor (LDR) based switch.
Making a simple variable power supply.
Power supply applications.
Ac and Dc current defintions.
Half wave and full wave rectifier.
Power supply circuit.
Used tools.
Working steps.
Testing.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
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Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
5. Introduction:
Temperature controlled DC fan is a temperature
based fan.
It can cool the devices by operating a DC fan when
the temperature in its vicinity increases above the
preset level.
Its operation is fully automatic and turns off when
the temperature returns normal.
6. Components Required:
NTC Thermistor - 10k
Resistor - 20k, 1k
Capacitor - 0.1uF, 0.01uF
IC - NE555
Diode - 1n4007
DC Fan - 12V
Transistor - BD139
DC Battery - 12v
Spread Board
Wires
Soldering Iron
10. What are NTC Thermistors:
NTC means “Negative Temperature Coefficient”. NTC
thermistors are resistors with a negative temperature
coefficient, which means that the resistance decreases
with increasing temperature. They are primarily used as
resistive temperature sensors and current-limiting
devices. The temperature sensitivity coefficient is about
five times greater than that of silicon temperature
sensors and about ten times greater than those of
Resistance Temperature Detectors. NTC sensors are
typically used in a range from −55°C to 200°C.
11. Types & Properties of NTC
Thermistors:
Materials typically involved in the fabrication of NTC
resistors are platinum, nickel, cobalt, iron and oxides
of silicon, used as pure. NTC Thermistors can be
classified into three groups, depending on the pro
duction process used.
Bead
thermistors
Disk and Chip
thermistors Glass encapsulated
NTC thermistors
12. Bead thermistors: Fast response times, better
stability and allow operation at higher
temperatures than Disk and Chip NTC sensors,
however they are more weak. The typical sizes
range from 0.075 – 5mm in diameter.
Bead
thermistors
Disk and Chip thermistors: They are larger and as a result
have slower reaction times than bead type NTC resistors.
However, because of their size, they have a higher
dissipation constant like power required to raise their
temperature by 1°C and since power dissipated by the
thermistor is proportional to the square of the current, they
can handle higher currents much better than bead type
thermistors. The typical sizes range from 0.25-25mm in
diameter.
Disk and Chip
thermistors
13. Glass encapsulated NTC thermistors: They
are designed for use with temperatures
above 150°C, or for printed circuit board
mounting. Encapsulating a thermistor in
glass improves the stability of the sensor,
as well as protecting the sensor from the
environment. They are made by
hermetically sealing bead type NTC
resistors into a glass container. The typical
sizes range from 0.4-10mm in diameter.
Glass encapsulated NTC
thermistors
14. IC NE555:
Integrated circuit (IC), sometimes called as a chip or microchip,
is a semiconductor wafer on which a thousand or millions of
tiny resistors, capacitors, and transistors are fabricated. An IC
can be a function as an amplifier, oscillator, timer, counter,
computer memory, or microprocessor.
IC NE555
15. Dc Battery:
A battery converts chemical energy into electrical energy
by a chemical reaction. Usually the chemicals are kept
inside the battery. It is used in a circuit to power other
components. A battery produces direct current electricity
and electricity that flows in one direction, and does not
switch back and forth.
16. Electrical current flows using two ways: either in a direct
current or in an alternating current. Electric current is
basically the free movement of electrons by a conductor.
The main difference between AC and DC is based upon
the direction in which the flow of electrons occurs.
18. 1n4007 Diode:
A rectifier diode is used as a one-way
check valve. Since these diodes only
allow electrical current to flow in one
direction, they are used to convert
AC power into DC power.
19. TRANSISTOR – BD139:
Transistors amplify current. For example, they can be
used to amplify the small output current from a logic IC
so that it can operate a lamp, relay, motor or other high
current device
20. Capacitor:
Its function is to store the electrical energy and give this
energy again to the circuit when necessary. In other
words, it charges and discharges the electric charge
stored in it.
Capacitor
0.1uF
21. Advantage:
It is very economical and easy to handle.
Motor fan runs automatically, so that it controls
the temperature without using it manually.
It is very easy to install at heat dissipating devices
to cool down them.
Saves the energy by turns OFF the motor fan at
normal or low temperature automatically.
23. Working Mechanism:
The basic working principle of temperature controlled
dc fan is based on the thermistor.
IC NE555 compares the voltage across the NTC
thermistor and voltage across the 20k Ω resistor.
At room temperature the voltage across the NTC will
be greater than or equals to the voltage across the
20k Ω resistor. So the IC NE555 output will be either
negative or zero voltage which can not turn ON the
Transistor.
24. If the temperature rises the resistance of thermistor
decreases as temperature which can turn ON the
Transistor.
When transistor turns ON, the motor(FAN) will be
connected across the DC supply and starts to rotate.
The motor will be turns OFF when the temperature
returns back to room temperature.
25. Applications:
Temperature Controlled Fan can be used to control
the temperature of devices, rooms, electronic
components etc. by monitoring the temperature.
The circuit can be used for Car Engine to reduce the
heat.
Cooling Pads in personal computers.