0
he circuit works off a 9V regulated power supply. However, battery back-up is recommended. A common-cathode, 7-segment display (LTS543) is used for displaying whether the loops are intact or not.
If loop 1 is broken, the display will show '1'. If two or all the three loops are broken, the display will show the sum of the respective broken loop nently. The loops are also connected to a dual 3-input NOR gate and inverter CD4000 (IC2) to activate the alarm.
Fig. 1 shows the circuit of the digital security system, while Fig. 2 shows the proposed wiring diagram for the loops around the premises. Before using this security system, make sure that loops shown in Fig. 2 are connected as shown in Fig. 1. If you don't want to use a buzzer, switch it off by opening switch S2.
The circuit works off a 9V regulated power supply. However, battery back-up is recommended. A common-cathode, 7-segment display (LTS543) is used for displaying whether the loops are intact or not.
If loop 1 is broken, the display will show '1'. If two or all the three loops are broken, the display will show the sum of the respective broken loop numbers. For example, if loops 1 and 4 are broken, the display will show 5(1+4).
When all the three loops are intact, the display will show '0.' All the three inputs of gate N1 remain low to give a high output. This high output is further given to gate N2 and, as a result, its output remains low. This keeps transistor T1 in cut-off position and the piezobuzzer does not sound.
When any loop is broken, the output of NOR gate N1 goes low, while the output of gate N2 goes high. Transistor T1 conducts and the buzzer sounds to alert you. You can mute the buzzer by switching off power to the circuit through switch S1.
What else can I help you with?
A device to place digital signals on an analog system and vice-versa?
DAC - Digital to Analog ConverterADC - Analog to Digital Converter
What is a analog-to-digital converter chip?
Its an IC which converts the analog signal at its input into digital output suitable for digital applications. It is an essential part of any digital system
What type of information system would be recognised by digital circuits?
binary system
Define prototype in ooad?
prototyping is an approach to e development to a system where software simulates the aspects of an actual processing system, in simple words prototyping can be called as a shorter version of working system, thanks Bharat Kumar Mishra bharat9234@yahoo.com
What is Current trends in digital switching system?
Two modern trends in digital electronics: smaller and faster.
Does a security digital recorder make up a security system?
Yes a security digital recorder can be a part of a security system you can go to the folllowing website to find out more information www.123securityproducts.com/
What is the working principle of digital control system?
nothing
What is the purposes of digital video surveillance systems?
The purpose of a digital video surveillance system helps to provide security to a home or business. Since the surveillance system is digital it is more reliable and doesn't need to be recorded on tapes.
Where can I get a good digital video security system?
Digital video security systems can be purchased at any electronics store, such as Best Buy or The Microcenter. If you prefer to buy online, honeywell is a very reputable company.
Where can I find a digital secuirty system?
You can find a digital security system at a local electronic retail store. Best Buy, Fry's, and Circuit City are the most reliable stores to buy items.
What are the advantages of analog system and digital system?
An analog system is usually simple requiring few components and gives results almost instantlyA digital system gives repeatable results with no drift or temperature sensitivity that can be as precise as desired
How can I catch my neighbor sneaking into my house without permission while you are working?
Get a security camera, a silent security system, or a watchful friend.
Security System Repair?
form_title=Security System Repair form_header=6443 What issues are you experiencing with your security system?*= [] False alarm [] Faulty window or door security [] Entry key pad isn't working [] Want to change programming or codes [] Want to expand my system [] Other What contractor installed the system for you?*= () Professional () Consumer () Don't Know
Are illegals eligible for Social Security Benefits.?
No. Only those who have paid into the system from working in the US.
I have an Oldsmobile alero 99 and the security light is constantly on however the car starts leading me to believe the security feature is not working. How can I fix the problem?
I wouldn't fix it if i was you.....I have a 2000 alero, and the security system (passlock) keeps it from starting often, and it seems to be a big problem with them. So if your security system isn't working but the car is running fine I wouldn't mess with it..
Why do you learn number system in digital logic?
One of the biggest applications of digital logic is using circuits to perform arithmetical operations. While theoretically, any number system could be used, binary is the most simple to express in terms of digital logic circuits.
How to wire a motion sensor for a security system?
To wire a motion sensor for a security system, first turn off the power to the area where you will be working. Connect the sensor's wires to the corresponding wires in the security system control panel. Make sure to follow the manufacturer's instructions for proper installation. Test the sensor to ensure it is working correctly before restoring power.
