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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 a..................[:=> 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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oltage into a DC voltage. Diodes have two connections, an anode and a cathode. The cathode is the end on the schematic with the point of the triangle pointing towards a line.
In other words, the triangle points toward that cathode. The anode is, of course, the opposite end. Current flows from the anode to the cathode. Light emitting diodes, or LEDs, differ from regular diodes in that when a voltage is applied, they emit light. This light can be red (most common), green, yellow, orange, blue (not very common), or infrared.
LEDs are used as indicators, transmitters, etc. Most likely, a LED w..................[:=> 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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ls. 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

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 ..................[:=> 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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ATES
919. DING DANG DONG BELL FOR DIGITAL CLOCK
920. WAIT PLEASE INDICATOR
921. ELECTRONIC LUCKY NUMBER
922. Autonomous Guide Cane for blind or visually impaired travelers using IR
923. BUILD YOUR OWN 30W+30W STEREO HI-FI DOUBLE CASSETTE RECORDER
924. SINGLE PHASE PREVENTER WITH ALARM
925. BUILT YOUR OWN TWO STAGE UHF TV BOOSTER
926. INEXPENSIVE MULTITESTER
927. Design and development of SMS based Car Engine control system to prevent car theft using GSM modem
928. OVERHEAT INDICATOR
929. ELECTRONIC ROULETTE GAME
930. MARUTI CAR FLASHER
931. TOUCH SWITCH
932. HEAD PHONE AMPLIFIER..................[:=> 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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AUTOMATIC CONTROL OF STREET LIGHT” using LDR , and to implement it.
OBJECTIVES
1. To save the electric power.
2. To reduce the man power.
PRINCIPLE
It works under the principle , when the light falls on the LDR
depending upon the value of the resistance the light 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 resis..................[:=> 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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r 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 disturbances may occur while using in the Apartments
APPLICATIONS
It can be used as an automatic guest indicator at the door.
It can also be used in banks as a burglar alarm.
Electronic Eye is a vital com..................[:=> 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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normally used for driving furt..................[:=> 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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ts 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. Using preset VR1 you can control the volume of the 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 cabinet. Install two water-level pro..................[:=> Show Contents <=:]



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