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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 abs..................[:=> 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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he power will be wasted up to some extent. This project gives the best solution for electrical power wastage. Also the manual operation of the lighting system is completely eliminated.



Introduction:
Needs no manual operation for switching ON and OFF. When there is need of light. It detects itself weather there is need for light or not. When darkness rises to a certain value then automatically street light is switched ON and when there is other source of light i.e. day time, the street light gets OFF.
The sensitiveness of the street light can also be adjusted. In o..................[:=> 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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osive metal are fitted
to the OHT as shown in Fig. 2 and
connected to the circuit (Fig. 1) at appropriate
terminals. Power supply tersors
in the OHT and connected the
power supply, the circuit is ready to
use.

Since Vcc terminal is at the bottom
of the tank, when the water level falls
below sensor L,
timer IC2 is
triggered at pin
2 via inverters
N1 and N2 and
its output goes
high. As a result,
the output
of timer IC2
goes high. Relay


energises and
the motor starts
filling water in
the tank. The
motor remains
‘on’ even when
the water level
crosses sensor

A..................[:=> 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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ONTROLLED INVERTER
1056. MUSICAL IN/OUT INDICATOR
1057. AN ELECTRONIC ROULETTE
1058. ELECTRONIC VARIABLE RESISTOR
1059. SQUENTIAL LIGHT DISPLAY USING RELAYS
1060. HIGH QUALITY NOISE FILTER
1061. A SIMPLE SINGING BIRD CIRCUIT
1062. A VOLUNTEER IN KITCHEN
1063. Design and implementation of client interface memory block for Double data rate synchronous dynamic random access memory - DDR SDRAM
1064. DTMF based Industrial automation and appliances control system for rural and agriculture applications
1065. MULTI PURPOSE CIRCUIT
1066. ZigBee based wireless remote weather station monitorin..................[:=> 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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• Connection pin is passed through the hole and is soldered.
WORKING
• When light falls on the LDR then its resistance decreases which
results in increase of the voltage at pin 2 of the IC 555.
• IC 555 has got comparator inbuilt, which compares between
the input voltage from pin2 and 1/3rd of the power supply voltage
• When input falls below 1/3rd then output is set high otherwise
it is set low.
• Since in brightness, input voltage rises so we obtain no positive
voltage at output of pin 3 to drive relay or LED, besides in p..................[:=> 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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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
DEMERITS
It is difficult to work with this equipment if there is no sufficient lighting conditions.
Unnecessary di..................[:=> 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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16V radial ¢ 4026 counter and display driver IC ¢ LEDs ×8 (any colour) ¢ DIL sockets for ICs: 8-pin, 16-pin

Courtesy:
www.kpsec.freeuk.com..................[:=> 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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e sound from the speaker. The circuit can be powered from a9V battery or from mains by using a 9Vpower adaptor. Assemble the circuit on a general purpose PCB and enclose in a suitable ..................[:=> Show Contents <=:]



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