Comments on: Miniature Loop Alarm http://www.elecfree.com/electronic/miniature-loop-alarm/ Thu, 08 Jan 2009 20:11:46 +0000 http://wordpress.org/?v=2.6.5 By: Miniature Loop Alarm | วงจร โครงงาน อิเล็กทรอนิกส์ http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-1183 Miniature Loop Alarm | วงจร โครงงาน อิเล็กทรอนิกส์ Thu, 27 Nov 2008 07:09:28 +0000 http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-1183 [...] As you can see a clear pattern of circuit is quite primitive and consists of two identical transistor switches. Each has its own alarm led and they combined with bovine 82 db buzzer. The two 1N4148 diodes are used to prevent the signal from a sensor to trigger so light-emitting diodes. In the sensors used are wire loops or normally closed switches cane or even a combination of both. You could, for example, tie wire capture your suitcase and place trust move to the door of your hotel room. [...] วงจรกันขโมยระบบลูป จุดเซ็นเซอร์ 2 จุด ขึ้นไป เมื่อจุดใดจุดหนึ่ง มีปัญหาก็จะส่งสัญญาณให้ออดส่งเสียงดังให้ได้ยินรับรู้ได้ครับ อ่านเพิ่มเติม [...] [...] As you can see a clear pattern of circuit is quite primitive and consists of two identical transistor switches. Each has its own alarm led and they combined with bovine 82 db buzzer. The two 1N4148 diodes are used to prevent the signal from a sensor to trigger so light-emitting diodes. In the sensors used are wire loops or normally closed switches cane or even a combination of both. You could, for example, tie wire capture your suitcase and place trust move to the door of your hotel room. [...] วงจรกันขโมยระบบลูป จุดเซ็นเซอร์ 2 จุด ขึ้นไป เมื่อจุดใดจุดหนึ่ง มีปัญหาก็จะส่งสัญญาณให้ออดส่งเสียงดังให้ได้ยินรับรู้ได้ครับ อ่านเพิ่มเติม [...]

]]> By: Single Zone Digital CMOS Alarm | Circuit Project Electronic http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-1159 Single Zone Digital CMOS Alarm | Circuit Project Electronic Sat, 22 Nov 2008 07:41:44 +0000 http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-1159 [...] Circuits More Security Circuits Single Zone Digital CMOS Alarm Event Failure Alarm By IC Timer 7555 Miniature Loop Alarm Gate Alarm by IC 4011 Enhanced 4 Digit Alarm Keypad by And [...] [...] Circuits More Security Circuits Single Zone Digital CMOS Alarm Event Failure Alarm By IC Timer 7555 Miniature Loop Alarm Gate Alarm by IC 4011 Enhanced 4 Digit Alarm Keypad by And [...]

]]> By: Programmable 4-State Tone Generator By IC Dual Timer 556 | Circuit Project Electronic http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-580 Programmable 4-State Tone Generator By IC Dual Timer 556 | Circuit Project Electronic Tue, 22 Jul 2008 14:58:02 +0000 http://www.elecfree.com/electronic/miniature-loop-alarm/#comment-580 [...] IC 555 More Security Circuits Single Zone Digital CMOS Alarm Event Failure Alarm By IC Timer 7555 Miniature Loop Alarm Gate Alarm by IC 4011 Enhanced 4 Digit Alarm Keypad by And Gate Auto Burglar Alarm by IC 555 More [...] [...] IC 555 More Security Circuits Single Zone Digital CMOS Alarm Event Failure Alarm By IC Timer 7555 Miniature Loop Alarm Gate Alarm by IC 4011 Enhanced 4 Digit Alarm Keypad by And Gate Auto Burglar Alarm by IC 555 More [...]

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