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Title: simple touch alarm circuit
Page Link: simple touch alarm circuit -
Posted By:
Created at: Wednesday 25th of March 2015 10:58:54 PM
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Title: working principle of simple touch alarm pdf
Page Link: working principle of simple touch alarm pdf -
Posted By:
Created at: Tuesday 27th of September 2016 03:19:52 PM
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Title: simple touch alarm using ic555 ppt
Page Link: simple touch alarm using ic555 ppt -
Posted By:
Created at: Monday 04th of August 2014 02:34:17 AM
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Title: working principle of simple touch alarm pdf
Page Link: working principle of simple touch alarm pdf -
Posted By:
Created at: Tuesday 09th of August 2016 10:41:27 PM
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Title: simple touch alarm using ic 555
Page Link: simple touch alarm using ic 555 -
Posted By:
Created at: Tuesday 11th of March 2014 06:11:53 AM
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Title: complete info about fire alarm sys using ic555
Page Link: complete info about fire alarm sys using ic555 -
Posted By:
Created at: Friday 09th of November 2012 02:37:27 AM
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Title: sequential timer using ic555 circuit diagram ppt
Page Link: sequential timer using ic555 circuit diagram ppt -
Posted By:
Created at: Tuesday 30th of October 2012 09:15:03 PM
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Title: simple touch alarm circuit using ic 555 ppt
Page Link: simple touch alarm circuit using ic 555 ppt -
Posted By:
Created at: Monday 15th of July 2013 11:20:04 PM
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Title: working principle of simple touch alarm pdf
Page Link: working principle of simple touch alarm pdf -
Posted By:
Created at: Wednesday 21st of October 2015 11:05:17 AM
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Title: Simple Fire Alarm Circuit
Page Link: Simple Fire Alarm Circuit -
Posted By: smart paper boy
Created at: Saturday 18th of June 2011 07:23:09 PM
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Simple Fire Alarm Circuit
Here is a simple fire alarm circuit based on a LDR and lamp pair for sensing the fire.The alarm works by sensing the smoke produced during fire.The circuit produces an audible alarm when the fire breaks out with smoke.
When there is no smoke the light from the bulb will be directly falling on the LDR.The LDR resistance will be low and so the voltage across it (below .6V).The transistor will be OFF and nothing happens.When there is sufficient smoke to mask the light from falling on LDR, the ....etc
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