By Bill Pretty
Construct your individual high-tech alarm approach at a fragment of the cost
Build your personal state of the art protection system
Monitor your approach from wherever you could obtain e-mail
Add regulate of alternative structures comparable to sprinklers and gates
Save hundreds of thousands on tracking and condominium fees
One of the easiest stored secrets and techniques of the protection is simply how easy the tracking truly is - BeagleBone has all of the computing energy you must construct your self an exceptionally subtle entry keep an eye on, alarm panel, and residential automation and community intrusion-detection method. defense businesses make a fortune every year via charging exorbitant charges to their shoppers. you'll find out how effortless it's to make an alarm approach with Beaglebone.
A company-maintained-and-monitored alarm method has its position - your pricey previous mum may not be going to be growing her personal process any time quickly. but when you're studying this ebook, you're most likely a builder or a hobbyist with the entire abilities required to do it your self. With development a house safeguard procedure with BeagleBone, you'll study every thing you must recognize to enhance your personal state of the art safety approach, interested by under a year's worthy of tracking fees out of your neighborhood alarm company!
You will begin via development and checking out your and open resource software program on an experimenter's prototype board ahead of progressing to extra advanced platforms. you'll then how you can try your new creations in a modular model and start to make use of BeagleBone. as soon as your approach is equipped and demonstrated, you'll set up the various professional-grade sensors utilized in sleek alarm platforms and tips on how to use them. additionally, you will detect how one can expand your alarm procedure in quite a few other ways. the single restrict can be your imagination.
What you are going to research from this book
Understand the elements of an alarm system
Build a simple quarter 1 alarm system
Modify your alarm method to accomplish complicated tasks
Build the particular onto BeagleBone
Integrate domestic automation into your safety system
Protect your community from intruders
Keep an eye fixed in your process from anyplace within the world
Install and use a variety of sensor equipment
Building a house safeguard procedure with BeagleBone is a pragmatic, hands-on advisor for useful, hands-on humans. The publication contains step by step directions for assembling your individual on professionally synthetic PCB's and establishing the software program in your system.
Who this publication is written for
This publication is for a person who's attracted to alarm platforms and the way they paintings; for hobbyists and basement tinkerers who like to construct issues. in order to construct the defined during this e-book, you'll want a few easy soldering talents, yet the entire elements are of the thru-hole kind and are really easy to place jointly. in terms of software program, you could simply run it as-is, but when you must alter the code, you will want wisdom of Java and IDEs.
Read or Download Building a Home Security System with BeagleBone PDF
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Additional info for Building a Home Security System with BeagleBone
This +12V can come from a key switch, a push button switch, a toggle switch, or anything you like as long as it applies +12V to the opto-isolator. Zone monitor schematic [ 43 ] Building the Hardware The following photograph shows the completed PCB. Assembled two zone input PCB You will notice that I have used sockets for the ICs. This is not strictly necessary, but when I build prototypes, I use sockets until I am sure that the design will work. Also notice that the rectifier diodes D3 and D4 are raised off the board.
0V), then the output will be high. 0V. This also happens if the wire is cut by a burglar. The following diagram shows what happens when the circuit is opened, either by an alarm contact or by a cut wire. Open circuit condition [ 15 ] Our Very First Alarm System The following diagram shows what happens when someone or something shorts out the alarm contacts. Contacts shorted What if the burglar tries to jumper the alarm contacts and shorts out the EOL resistor? In this case, the minus input of the LM339 comparator goes higher than the positive input, and once again the output is pulled low.
This makes them a bit more complex to install. If you are following my layered-defense technique, then there will never be a need to have active sensors (PIRs) and passive sensors (window contacts) in the same zone. Active sensor wiring [ 29 ] Bigger and Better The only difference between the two wiring examples is that the power is connected in parallel and the contacts are connected in series. Sensor wiring (schematic) These two examples use the least amount of wire. If you have plenty of wire, then pull all of the sensor and contact wiring back to your panel and make the connections there.