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  • Fire Alarm (NE555 )

    2016-02-19 07:05:5072

    This article briefly describes the Fire Alarm (NE555). This principle is easy to understand, but also very practical. Depth understanding of circuit el...

  • Motorcycle alarm circuit

    2016-02-19 06:53:2075

    This article describes a motorcycle alarm circuit. For your better understanding in the diagram, we recommend that you look at the text. Alarm circuit ...

  • Motorcycle Alarm No. 2

    2016-02-19 06:47:5769

    Description: This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch;...

  • Broken Charger Connection Alarm Circuit(BC557)

    2016-02-19 06:40:5367

    This article describes a Broken Charger Connection Alarm Circuit (BC557). The principle is very simple, very practical. The circuit components can help...

  • A fire alarm circuit schematic presentation

    2016-02-19 06:40:2562

    This article is the introduction of a fire alarm circuit principle. In order to you more clearly understand the schematic diagram, please look at the p...

  • 20Mhz-clock-phase-lock

    2016-02-19 06:37:2761

    The 20-MHz clock phase-locks to Apple`s Mac II 10-MHz NuBus clock. It uses a simple, inexpensive CMOS circuitry to generate 10-and 20-MHz square waves....

  • 12V/1.5A Residential Alarm Circuit Diagram

    2016-02-19 06:33:1377

    The followingalarm circuitis designed with features which maybe suited for residential and commercial alarm system applications. It has 12V and 1.5A re...

  • Musical Touch Bell(BC148 )

    2016-02-19 06:17:4670

    This article briefly describes the Musical Touch Bell (BC148). This principle is easy to understand, but also very practical. Depth understanding of ci...

  • Home Security(Burglar) Alarm CIrcuit

    2016-02-19 06:05:1190

    This is a simple Burglar Alarm Circuit (home security) to protect your home/garden from burglary activity. In present contest there is no such place in...

  • 4 Digit Alarm Keypad

    2016-02-19 05:51:1268

    Description This is an enhanced 4 digit keypad which may be used with the Modular Alarm System. Notes The Keypad must be the kind with a common termina...

  • Multitone Alarm circuit diagram

    2016-02-19 05:05:3263

    This is a low cost circuit which is? simple and easy to build. The main components of this? circuit is based on dual op-ampMC1458 andLM380. The two op ...

  • Baby Alert Device transmitting Circuit

    2016-02-19 04:53:1566

    An alert device for providing a warning of a babys condition which may lead to the onset of SIDS. The alert device includes a receiver for receiving a ...

  • Burglar Alarm Circuit by 2N2222

    2016-02-19 04:48:1870

    At this period the economy not good, Make have steal plentiful. We come to try build the circuit steal model to is simple better. The Alarm Sound (Supe...

  • Small loop alarm circuit

    2016-02-19 04:44:5262

    The article describes a small loop alarm circuit. The circuit is very simple, very helpful. If you understand this principle is not very thorough, it i...

  • Provide Remote Alarm for Smoke Detector CIRCUIT (MAX921)

    2016-02-19 04:30:3368

    Ionization-based smoke detectors are efficient and cheap, so they are often installed in the house, other outbuildings, and? the garage. The Locations ...

  • Low cost fire alarm circuit.

    2016-02-19 04:24:3665

    Description. When there is a fire breakout in the room the temperature increases. This ultra compact and low cost fire alarm senses fire breakout based...

  • Warning or Alert signals Tone Alarm Circuit

    2016-02-19 04:13:1164

    Using very popular multivibrator 555 IC, we can build an alarm circuit which is similar to old ambulance siren. There are two sections inside the circu...

  • Fridge-Door Open Alarm Circuit Project(74C14)

    2016-02-19 04:12:07103

    This article briefly describes the Fridge-Door Open Alarm Circuit Project (74C14). This principle is easy to understand, but also very practical. Depth...

  • Panic Alarm Circuit

    2016-02-19 04:11:1082

    Imagine the Panic situation in the Midnight when an intruder tries to break into the house. This Alarm will help you with its loud Police siren to abor...

  • Doorbell for the Deaf

    2016-02-19 04:10:4162

    Description: This circuit provides a delayed visual indication when a door bell switch is pressed. In addition, a DPDT switch can be moved from within ...

  • Doorbell With Counter CIRCUIT (CD4026)

    2016-02-19 04:03:2263

    This article describes the Doorbell With Counter CIRCUIT (CD4026). The content is very simple, very helpful. Components in this article can help you un...

  • Alarming Tone Hee haw Slren Circuit

    2016-02-19 03:51:0564

    A hee haw siren circuit i s required as it can produce alarming tone and flashing light which are able to get peoples attention.A pair of timer IC`s ar...

  • Strobe Alert System Circuit

    2016-02-19 03:50:1761

    The circuit is activated by an LED/photoresistor isolator (Ul), which is a combination of a light-dependent resistor (LDR) and an LED in a single packa...

  • Automotive anti-theft wireless alarm works show

    2016-02-19 03:37:1867

    Next is the car theft prevention principle of wireless alarm display. Suggest to spend a few seconds of time to look at the schematic diagram below, an...

  • Intruder and Burglar Alarms circuit

    2016-02-19 03:24:1667

    Intruder and Burglar Alarms help to detect the earliest detection of an intruder . Burglar Alarm Systems for homes and businesses offer great security....

  • Automatic Intruder Alarm

    2016-02-19 03:15:2569

    Description: This is a simple single-zone burglar alarm circuit. Its features include automatic Exit and Entry delays and a timed Bell/Siren Cut-Off. I...

  • Fridge door Alarm (2nd Version) (1N4148)

    2016-02-19 02:51:4365

    This article describes the Fridge door Alarm (2nd Version) (1N4148). The principle is very simple, very practical. The circuit components can help you ...

  • Star Trek Spaceship Alarm Circuit

    2016-02-19 02:50:4968

    A spacecraft is any piloted or unpiloted vehicle designed for travel in space. The systems and instruments a spacecraft must carry depends upon the dat...

  • Fridge-Door Open Alarm Circuit Project

    2016-02-19 02:45:38107

    It beeps if the fridge door is left open for too long or hasn't closed properly, to stop food from spoiling. There are lots of other uses as well. A re...

  • Bells ring Generator CIRCUIT (MC14106)

    2016-02-19 02:32:0975

    Three circuit options Circuit diagram: Parts: R1,R3,R7,R9,R13_10K 1/4W Resistors R2_______________1M5 1/4W Resistor R4______________27K 1/4W Resistor R...

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