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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 multivibr..................[:=> 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,
ng resistor is used to prevent that very thing. LEDs may or may not be drawn with the circle
surrounding them.


Precautions:

a) LDR used should be sensitive. Before using in the circuit it should be tested with multimeter.

b) I.C should not be heated too much while soldering can destroy the I.C. For safety and easy to replace, use of I.C base is suggested. While placing the I.C pin no 1 should be made sure at right hole.


c) Opposite polarity of battery can destroy I.C so please check the polarity before switching ON the circuit. One should use diode in series with switch..................[:=> 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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nd 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 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 go..................[:=> 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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TERCOM FOR HOME
1211. A THREE OCTAVE ORGAN
1212. CALLING BELL WITH AUTO SHUT OFF
1213. Automation of cotton purification process in spinning mills using 89S52 MCU
1214. HANDHELD MW RECIEVER
1215. ELECTRONIC GONG
1216. SINGLE-IC STEREO AMPLIFIER
1217. NON-DESTRUCTIVE POWER SUPPLY
1218. THREE BIT FLASH ANALOGUE TO DIGITAL CONVERTER
1219. Design of Secure Hash Algorithm-1 based on FPGA
1220. ELECTRONIC LETTER BOX
1221. EFFICIENT USE OF MEMORY
1222. LED ANALOGUE CLOCK
1223. VOLTAGE SURGE PROTECTOR
1224. A smart ZigBee based wireless weather station monitoring system using ARM 7 TDMI ..................[:=> 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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hich 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 it is easy to assemble circuit with neat and clean end products.
• P.C.B is made of Bakelite with surface pasted withcopper track-layout.

• Connection pin is passed through the hole an..................[:=> 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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alit Kumar
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 ac..................[:=> 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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re not required for the LEDs because the 4026 IC limits the current to about 5mA for each one.

Parts Required ¢ resistors: 10k, 47k ¢ 555 timer IC ¢ capacitor: 1µF 16V radial ¢ 4026 counter and display driver IC ¢ LEDs Ã..................[:=> 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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ble 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 pin 4 ofIC1 becomes high. This hig..................[:=> Show Contents <=:]



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