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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..................[:=> 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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node 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 will never burn out like a regular lamp will and requires ma..................[:=> 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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on nowadays. The
one described here is
built around timer NE555 and
inverter buffer CMOS IC CD4049.
It uses readily-available, low-cost
components, and is easy to build
and install on the over-head
tank (OHT) to prevent wastage of
water.

The circuit works off a 12V battery
or 230V AC mains using a 12V
adaptor. The three sensors built
from non-corrosive 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..................[:=> 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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ing using ARM 7 TDMI processor based LPC2148 Controller
1073. MINIATURE LAMP FLASHER
1074. VERSATILE INTERCOM SYSTEM
1075. REGULATED SUPPLY FOR OPAMPS
1076. A VARIABLE AUDIO FREQUENCY OSCILLATOR
1077. IMPROVED DELAY SWITCH FOR DOORBELL
1078. TRANSFORMERS POWER SUPPLY
1079. DIGITAL LED VOLTMETER
1080. STEREO BALANCE INDICTOR
1081. RESETTING PRJOTECTOR FOR COMPUTERS
1082. SIMPLE ELECTRIC LOCK
1083. Channel estimation for wireless Orthogonal Frequency Division Multiplexing OFDM systems
1084. Finger Print based Driving License Management System
1085. POWER SUPPLY PROTECTION
1086. THR..................[:=> 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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IM
Our aim is to design an “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
..................[:=> 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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Prakash Chand
Ruchee Chauhan


MAGIC EYE ALARM
Introduction

Electronic eye or magic eye has much use in this electronic age. Also known as magic eye. It can be used as an automatic guest indicator at the door, 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 ..................[:=> 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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r 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, 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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Both IC1 and IC2 are wired in astable multivibrator mode. TimerIC1 produces low frequency, while timer IC2 produces high frequency. As a result, a beeping tone is generated when the liquid tank is full. Initially, when the tank is empty, transistor T1 does 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 ..................[:=> Show Contents <=:]



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