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simple touch alarm using ic 555


Posted by:
Created at: Monday 10th of March 2014 05:11:53 PM
Last Edited Or Replied at :Monday 10th of March 2014 05:11:53 PM
simple touch alarm using ic 555 ,
abstract or information regarding simple touch alarm using ic555..................[:=> Show Contents <=:]



abstract of touch alarm using ic 555


Posted by:
Created at: Monday 10th of March 2014 07:56:24 AM
Last Edited Or Replied at :Monday 10th of March 2014 07:56:24 AM
simple touch alarm using ic555 , touch alarm using ic 555, simple touch alarm using ic 555 ,
abstract for touch alarm using ic555
bhavana
i need an a..................[:=> Show Contents <=:]



simple touch alarm circuit using ic 555 ppt


Posted by:
Created at: Monday 15th of July 2013 10:20:04 AM
Last Edited Or Replied at :Monday 10th of March 2014 05:09:22 PM
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i want circuit diagram and applicat..................[:=> 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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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
C2-0.1MFD
C3-22MFD 12V
IC : NE555 TIMER
Miscellaneous : Power supply
Speaker
LDR-Light dependent resistor
LDR IC C&R WORKIN..................[:=> Show Contents <=:]



CELL PHONE CONTROLLED AUDIOVIDEO MUTE SWITCH


Posted by: seminar class
Created at: Tuesday 15th of March 2011 12:13:49 AM
Last Edited Or Replied at :Wednesday 20th of April 2011 01:46:06 AM
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]
• A light-emitting diode (LED) (pronounced /ˌɛl.iːˈdiː/, or just /lɛd/) is a semiconductor light source. LEDs are used as indicator lamps in many devices, and are increasingly used for lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness.
• The LED is based on the semiconductor diode. When a diode is forward biased (switched on), electrons are able to recombine with holes within the device, releasing e..................[:=> 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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not really random because seven of the LEDs would normally be the display segments, the eighth LED is driven by an output that is normally used for driving further counters. The table below shows the sequence for the LEDs. You can use less than eight LEDs if you wish and the table may help you decide which ones to use for your purpose. Resistors are 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 <=:]



timer circuits using latches


Posted by: naveenchinnu
Created at: Tuesday 23rd of March 2010 08:07:21 AM
Last Edited Or Replied at :Saturday 30th of October 2010 02:16:18 AM
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i need a RTL schematic, verilog code for designin..................[:=> 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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It is built Around two BC547 transistors(T1 and T2) and two timer 555 ICs (IC1and IC2). 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..................[:=> Show Contents <=:]



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