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Title: interfacing mq7 sensor with pic 16f877a
Page Link: interfacing mq7 sensor with pic 16f877a -
Posted By:
Created at: Sunday 23rd of April 2017 10:02:33 PM
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Hello everyone
I will make a project as smoke detector. And i want to use just mq7 and buzzer to work when the smoke detected. So can anyone help me please, i have almost no idea with electronics.

Thanks ....etc

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Title: graphical lcd interfacing at89c51
Page Link: graphical lcd interfacing at89c51 -
Posted By:
Created at: Friday 02nd of November 2012 10:48:12 PM
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i want program for this............ would u plz help me.??? ....etc

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Title: LCD INTERFACING USING AT89C51
Page Link: LCD INTERFACING USING AT89C51 -
Posted By: seminar class
Created at: Monday 09th of May 2011 11:53:35 AM
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Submitted By
ACHARYA MIRAJ SHAILESHBHAI


INTRODUCTION
The declining prices of the LCDs. The ability to display number, characters and graphics. This is in contrast with LEDs, which are limited to numbers and few characters. Incorporation of a refreshing controller in to LCD, thereby relieving the CPU to keep displaying the data. Ease of programming for the characters and graphics.
Block Diagram
Block Description:
In this project there are three main blocks
1. Power supply section
2. Controll ....etc

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Title: DIGITAL AUDIO PROCESSOR USING AT89C51
Page Link: DIGITAL AUDIO PROCESSOR USING AT89C51 -
Posted By: seminar class
Created at: Thursday 03rd of March 2011 02:18:44 PM
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DIGITAL AUDIO PROCESSOR USING AT89C51
1. BACKGROUND
This report presents an infrared (IR) remote-controlled digital audio processor.
It is based on a microcontroller and can be used with any NEC-compatible full function
IR remote-control. This audio processor has enhanced features and can be easily customized to meet individual requirements as it is programmable.
Its main features are:
1. Full remote control using any NEC-compatible IR remote control handset.
2. Provision for four stereo input chann ....etc

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Title: MICROCONTROLLER AT89C51 BASED AUTO SPEED LIMITER WITH AUTO BREAKING
Page Link: MICROCONTROLLER AT89C51 BASED AUTO SPEED LIMITER WITH AUTO BREAKING -
Posted By: [email protected]
Created at: Monday 01st of February 2010 08:30:25 PM
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MICROCONTROLLER AT89C51 BASED AUTO SPEED LIMITER WITH AUTO BREAKING ....etc

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Title: 2 button interfacing with at89c51
Page Link: 2 button interfacing with at89c51 -
Posted By:
Created at: Friday 19th of April 2013 09:56:17 AM
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dear sir,.
i need how to push button use to increment&decrement decimal value(0 to 999) in lcd display using at89c51 micro controller.i want interface 3 pushbutton. 1st button pressing 2 or 3 sec ,after adjust one button to increase value,another button using decrement value.then press 1st button
this value wiil be constant. i need the circuit diagram & embedded c code.
pls help me. ....etc

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Title: PHASE-ANGLE CONTROL OF SCR USING AT89C51
Page Link: PHASE-ANGLE CONTROL OF SCR USING AT89C51 -
Posted By: seminar class
Created at: Tuesday 22nd of March 2011 01:35:11 PM
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PHASE-ANGLE CONTROL OF SCR USING AT89C51
Silicon-controlled rectifiers (SCR) are solidstate semiconductor devices that are usually used in power switching circuits. SCR controls the output signal by switching it ‘on’ or ‘off’, thereby controlling the power to the load in context. The two primary modes of SCR control are phase-angle fired-where a partial waveform is passed to regulate the power.
In the phase-angle controller, the firing pulse is delayed to turn on the SCR in middle of every half cycle. This ....etc

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Title: MICROCONTROLLER AT89C51 BASEDAUTO SPEED LIMITER WITH A UTO BREAKING
Page Link: MICROCONTROLLER AT89C51 BASEDAUTO SPEED LIMITER WITH A UTO BREAKING -
Posted By: [email protected]
Created at: Monday 01st of February 2010 08:35:34 PM
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I AM SEARCHING FOR CIRCUIT DIAGRAM OF MICROCONTROLLER AT89C51 BASED AUTO SPEED LIMITER WITH AUTO BREAKING ....etc

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Title: Speed control of stepper motor using AT89c51
Page Link: Speed control of stepper motor using AT89c51 -
Posted By: Tony Akpaka
Created at: Tuesday 08th of June 2010 04:31:33 AM
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Please can anyone assist me with the write up of speed control of stepper motor using AT89c51 ....etc

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Title: 8 CANDIDATE QUIZ BUZZER USING 8051 MICRO CONTROLLER AT89C51
Page Link: 8 CANDIDATE QUIZ BUZZER USING 8051 MICRO CONTROLLER AT89C51 -
Posted By: seminar class
Created at: Friday 04th of March 2011 03:40:02 PM
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POWER SUPPLY
The input to the circuit is applied from the regulated power supply. The a.c. input i.e., 230V from the mains supply is step down by the transformer to 5V and is fed to a rectifier. The output obtained from the rectifier is a pulsating d.c voltage. So in order to get a pure d.c voltage, the output voltage from the rectifier is fed to a filter to remove any a.c components present even after rectification. Now, this voltage is given to a voltage regulator to obtain a pure constant dc voltage
Transformer ....etc

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