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astable multivibrator using ic 555 timer pdf


Posted by:
Created at: Monday 22nd of October 2012 07:01:28 AM
Last Edited Or Replied at :Wednesday 17th of April 2013 09:42:08 PM
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i need a report on astable multivibrator using ic 555 in ieee ..................[:=> 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
automatic street light controller using 555 , automatic street light controller using ic 555, project report of automatic street light by using ic 555 , street light controller using 555, ic 555 as sreet light control project report , street light controller with ic555,
]
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 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..................[:=> 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 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 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 mo..................[:=> 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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EON MONITOR
898. Supervisory control and data acquisition system (SCADA) using GSM modem
899. RFID based Library Automation System
900. UNDER/OVER VOLTAGE PROTECTION CIRCUIT WITH DELAY
901. DIGITAL VOLUME CONTROL
902. TELEPHONE BUG
903. 8W + 8 W STEREO AMPLIFIER MODULE
904. SERVO VOLTAGE STABILISER
905. ULTRASONIC PEST REPELLER
906. ELECTRONIC ANALOGUE MULTIMETER
907. ELECTRONIC IGNITION SYSTEM FOR AUTOMOBILES
908. PC based power distribution monitoring system
909. RAIN DETECTOR
910. 0-24 V REGULATED DC POWER SUPPLY
911. SMOKE ALARM
912. AN AUTOMATIC EMERGENCY LIGHT WITH DUAL L..................[:=> 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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lement 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 resistance whose value depends on the
..................[:=> 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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can even be used in a simple remote control circuit using the backlight of a mobile phone to turn on a device
Once it is installed at the door there is no need to install a call bell.
Only 5V DC power supply is required for operating the circuit.
..................[:=> 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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sequence for the LEDs. You can use less than eight LEDs if you wish and the table may help you decid..................[:=> 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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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. 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 ..................[:=> Show Contents <=:]



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