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sequential timer circuit using ic 555 in wikipedia


Posted by:
Created at: Sunday 28th of October 2012 10:40:56 AM
Last Edited Or Replied at :Friday 18th of July 2014 04:13:11 PM
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hello i want circuit diagram and operation and abstract of sequent..................[:=> Show Contents <=:]



Using Energy Conversations Technique Automatic Street light control By IC555


Posted by: seminar paper
Created at: Thursday 08th of March 2012 03:44:18 AM
Last Edited Or Replied at :Thursday 08th of March 2012 03:44:18 AM
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fore using in the circuit it should be tested with multimeter.

b) I.C should not be heated too much while soldering can destroy the I.C. For safety and easy to replace, use of I.C base is suggested. While placing the I.C pin no 1 should be made sure at right hole.


c) Opposite polarity of battery can destroy I.C so please check the polarity before switching ON the circuit. One should use diode in series with switch for safety since diode allows flowing current in one direction only.



d) L.E.D glows in forward bias only so incorrect polarity of L.E.D will not glow. Out put voltage ..................[:=> Show Contents <=:]



SIMPLE AUTOMATIC WATER-LEVEL CONTROLLER


Posted by: seminar addict
Created at: Monday 16th of January 2012 03:49:31 AM
Last Edited Or Replied at :Monday 20th of February 2012 04:47:56 AM
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The
motor remains
‘on’ even when
the water level
crosses sensor

As water in
the tank rises to
touch sensor H, timer IC2 is retriggered
at pin 6 via inverters N3
and N4 and as a result, its output
goes low. The relay de-energises and
the motor stops filling water in the
tank. The motor remains ‘off’ even
when the water level falls below sensor

As water is consumed and its level
falls below sensor L, the motor restarts.
Thereafter, the cycle repeats.
You can also manually start and
stop the motor using switch S1. 

minal Vcc is at the bottom of the tank,
senso..................[:=> Show Contents <=:]



a big electronics projects list for diploma or engineering students


Posted by: project topics
Created at: Sunday 08th of May 2011 12:22:24 PM
Last Edited Or Replied at :Friday 01st of July 2011 04:55:49 AM
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1230. LOW POWER PILOT LAMP (LPPL)
1231. Implementation of Serial port device driver using ARM 7 TDMI processor based LPC2148 Controller
1232. ELECTRONIC BALANCE AND LOUDNESS CONTROL
1233. A VERSATILE DECIBEL METER
1234. TONE CONTROL FOR GUITAR AMPLIFIER
1235. VERSATILE DIGITAL TIMER
1236. Code Generator
1237. TESTING A TRANSISTOR WITHOUT A TRANSISTOR TESTER
1238. Traffic Light controller
1239. ELECTRONIC LOCK
1240. High sensitive IR based Unmanned Railway Gate Control using AT89C51 Microcontroller
1241. SIMPLE TEMPERATURE CONTROLLER
1242. ELECTRONIC TEMPERATURE CONTROLLED SOLDER..................[:=> Show Contents <=:]



IC CONTROLLED STREET LIGHT


Posted by: seminar class
Created at: Saturday 23rd of April 2011 05:00:18 AM
Last Edited Or Replied at :Saturday 23rd of April 2011 05:00:18 AM
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ght is turnedON and OFF.
ABSTRACT
• Needs no manual operation for switching.
• When there is a need of light it automatically detects that weather there is need of light or not.
• Light is switched OFF at night and ON at the morning hours.
LDR
• It is a special type of resistance whose value depends on the
brightness of light which is falling on it.
• It has resistance of about 1mega ohm when in total darkness,
but a resistance of only about 5k ohms when brightness illuminated.
• It responds to a large part of..................[:=> Show Contents <=:]



MAGIC EYE ALARM


Posted by: seminar class
Created at: Friday 22nd of April 2011 11:27:43 PM
Last Edited Or Replied at :Thursday 20th of June 2013 12:17:18 AM
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e acting as oscillator to generate sound whenever shadow is cast on LDR .
Timer 555 is connected to operate in astable mode of operation . Resistors R1, R2 along with capacitor C2 & C3 are required to operate the time properly.
OBSERVATION&ANALYSIS
Electronic eye circuit works as light intensity indicator.
Speaker will be activated.
FUTURE SCOPE
We can increase the range of this equipment by using better sensor.
We can use this as Remote Controller.
MERITS
Low cost
Easy to construct
Portable
Low power consumption
Real time applications
DEMERIT..................[:=> Show Contents <=:]



Random Flasher for 8 LEDs Project


Posted by: project topics
Created at: Saturday 03rd of April 2010 10:58:22 AM
Last Edited Or Replied at :Saturday 03rd of April 2010 10:58:22 AM
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mally be the display segments, the eighth LED is driven by an output that is normally used for driving further counters. The table below shows the sequence for the LEDs. You can use less than eight LEDs if you wish and the table may help you decide which ones to use for your purpose. Resistors are not required for the LEDs because the 4026 IC limits the current to about 5mA for each one.

Parts Required ¢ resistors: 10k, 47k ¢ 555 timer IC ¢ capacitor: 1µF 16V radial ¢ 4026 counter and display driver IC ¢ LEDs ×8 (any colour) ¢ DIL sockets for ICs: 8-pin..................[:=> Show Contents <=:]



liquid level Alarm


Posted by: electronics seminars
Created at: Saturday 09th of January 2010 06:31:42 AM
Last Edited Or Replied at :Saturday 09th of January 2010 06:31:42 AM
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oes not conduct. Consequently, transistor T2 conducts and pin 4 of IC1 is low. This low voltage disables IC1 and it does not oscillate. The low output of IC1 disables IC2and it does not oscillate. As a result, no sound is heard from the speaker. But when the tank gets filled up, transistor T1 conducts. Consequently, transistor T2 is cut off and pin 4 ofIC1 becomes high. This high voltage enables IC1 and it oscillates to produce low frequencies at pin 3. This low-frequency output enables IC2 and it also oscillates to produce high frequencies. As a result, sound is produced from the speaker. Usi..................[:=> Show Contents <=:]



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