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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 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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et light gets OFF.
The sensitiveness of the street light can also be adjusted. In our project we have used four L.E.D for indication of bulb but for high power switching one can connect Relay (electromagnetic switch) at the output of pin 3 of I.C 555. Then it will be possible to turn ON/OFF any electrical appliances connected all the way through relay.




Principle:

This circuit uses a popular timer I.C 555. I.C 555 is connected as comparator with pin-6 connected with positive rail, the output goes high(1) when the trigger pin 2 is at lower then 1/3..................[:=> 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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N3
and N4 and as a result, i..................[:=> 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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NERATOR
412. PULSE NARROWING AND PULSE STRETCHING CIRCUITS
413. CMOS PULSE MONITOR
414. BACK UP SUPPLY FOR CALCULATORS
415. RAIN ALARM
416. Square root of the Floating Point number
417. Petrochemical Level Indicator and controller for automation of Cotton Purification industries using ARM 7 TDMI processor based LPC2148 Controller
418. ZENER TESTER
419. DIGITAL CAR LOCK WITH ALARM
420. WATER LEVEL INDICATOR
421. Petrochemical level indicator and controller for automation of cotton purification industries using PSOC Mixed Signal Array
422. UNIQUE CUT-OUT FOR MOTORCYCLE
423. LOW COS..................[:=> 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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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 light spectrum.
TRANSFORMER
For 9v ac power supply we can use step down transformer in order to convert 230 volt to 9 volt.
P.C.B
• With the help of P.C.B ..................[:=> 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, if fixed at the bottom of the door entrance. Once it is installed at the door there is no need to install a call bell. It can also be used at homes or in banks as a burglar alarm.
WORKING PRINCIPLE
principle of working mainly depends on the
LDR
LDR is a device which has a resistance which varies according to the amount of light falling on its surface
BLOCK DIAGRAM
CIRCUIT DIAGRAM
COMPONENTS

Resistors : R1 - 2.2K
R2 - 100K
R3 - LDR
Capacitor : C1 - 0.02MFD
..................[:=> 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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esy:
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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probes using metal strips such that one touches the bottom of the tank and the other touches the maximum level of the water in the tank. Interconnect the sensor and the circuit using a flexible wire...................[:=> Show Contents <=:]



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