http://electroschematics.com/5346/panic-alarm/ Thu, 09 Sep 2010 08:45:30 +0000 hourly 1 http://wordpress.org/?v=3.0.1 http://electroschematics.com/5346/panic-alarm/comment-page-1/#comment-14731 Arvince Sat, 14 Aug 2010 06:18:54 +0000 http://electroschematics.com/?p=5346#comment-14731 Thank for the information sir.Now, i can proceed my project. Thank for the information sir.Now, i can proceed my project.

]]> http://electroschematics.com/5346/panic-alarm/comment-page-1/#comment-14678 D.Mohankumar Thu, 12 Aug 2010 14:44:42 +0000 http://electroschematics.com/?p=5346#comment-14678 We cannot substitute UM 3561. It is the siren generator IC.A simple buzzer can be connected at the output of IC555 is UM 3561 is not available. AC 187 can be substituted with BC547/548 eventhough the sound output will be low.You can use a high gain NPN transistor for it We cannot substitute UM 3561. It is the siren generator IC.A simple buzzer can be connected at the output of IC555 is UM 3561 is not available. AC 187 can be substituted with BC547/548 eventhough the sound output will be low.You can use a high gain NPN transistor for it

]]> http://electroschematics.com/5346/panic-alarm/comment-page-1/#comment-14650 Arvince Wed, 11 Aug 2010 16:58:17 +0000 http://electroschematics.com/?p=5346#comment-14650 Dear sir, i want to use panic alarm for my project. But, here are so hard to find ic um3561 and T2 AC187. what the other component that can be replaced for both component? please reply this comment. thank Dear sir, i want to use panic alarm for my project. But, here are so hard to find ic um3561 and T2 AC187. what the other component that can be replaced for both component? please reply this comment. thank

]]> http://electroschematics.com/5346/panic-alarm/comment-page-1/#comment-12169 Ed Tue, 08 Jun 2010 21:33:29 +0000 http://electroschematics.com/?p=5346#comment-12169 I just can't tell u how much I have enjoyed this site !! Though I haven't recieved any anserws to my questions,,,,yet. I have really looked forward to opening my e-mail to find NEW and different circuits to build and experiment with. I know zealch about electronics but find it alluring and fascinating. I have learned,,,even @ 54 yrs of age and I LIKE IT!! I just can’t tell u how much I have enjoyed this site !! Though I haven’t recieved any anserws to my questions,,,,yet. I have really looked forward to opening my e-mail to find NEW and different circuits to build and experiment with. I know zealch about electronics but find it alluring and fascinating. I have learned,,,even @ 54 yrs of age and I LIKE IT!!

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