2015年6月17日星期三

Top Tips for Deterring Burglars

One of the best ways of deterring burglars is to demonstrate that your home has active security. Highly visible alarm boxes and/or security cameras that can be seen from the street will act as deterrence before a thief commits themselves to breaking in.
Having good quality locks is a must, since a door, regardless of its sturdiness, is only as secure as its lock. It is advisable to have two different locks on external doors, one latch type lock that will secure the door automatically and a mortise or deadlock that should be used whilst the house is empty and before going to bed at night. Sliding patio doors should be fitted with anti-lift devices along with removable track locks.
Because burglars will take the path of least resistance, it is important to ensure that windows, especially on the ground floor, are kept closed when the home is unoccupied. Ladders should be stored inside a garage or shed. If you do not have a secure place to store them, then they should be protected by a lock and chain. Shrubbery should be trimmed regularly to avoid providing concealment for burglars and branches that might afford access to upper story windows should be cut off.

Deter Burglars from Your Home

Having good external lighting is an excellent deterrence. While motion detecting lighting is popular, it can be triggered by wildlife, or if incorrectly set by passing pedestrians or cars. An alternative option is low energy lighting fitted with photo-electric cells that automatically activate when the daylight level reaches a certain point. An added bonus with this system is that it will activate even if you are away. Although people commonly leave a spare key hidden outside, it is not a wise thing to do. A better option is to leave a key with a trusted neighbor.
If you have a basement it is a good idea to fit sturdy wire screens to the windows, and always leave the basement door locked, this also applies to doors that lead from a garage to the house. The use of timers to switch on and off lights while you are away is recommended. Never leave a light burning constantly since this is a dead giveaway that the premises are empty.

How to Deter Burglars?

Arrange for mail and newspapers to be picked up by a friend or neighbor or canceled for the duration of your absence. If you are getting work done to your car only gives the mechanics the key to the car and supply your business address not your home one. Make sure you do not leave valuables lying in full view. Store jewelry away out of sight since a burglar is less likely to break in if there is little available reward.
Having a dog is a great deterrence but having on simply to protect your property is not a fair thing to do. Having a system that uses recorded barking may also be deployed. Even if the burglar is uncertain about whether you have a dog or not they are less likely to break in just in case. Always keep the doors and windows locked and carefully check identification before allowing anyone into your home.

Light up to Deter Burglars

Do not announce your absence by leaving a message on your answering machine saying you are not home. Leave a message asking for their name and number and that you will get back to them. Even if you have a security burglar alarm system fitted it is important to follow good security practices since an alarm is not a guarantee that you will not be burgled. It simply makes a burglar less likely to choose your property.

How can you build your own Burglar Alarm?

Using a burglar alarm on your premises considerably decreases the risk of burglary. There are many types of home burglar alarm systems, each with different models and features as well as technical specifications. The start-up cost for these devices is generally over $100 and they come with various components and capacities.
Using homemade products is a great method of reducing the costs. We can make up our own alarm system by purchasing the necessary parts and putting them together. Purchasing all the necessary components and putting them together at home makes the same alarm system cheaper.

Basic Parts of Burglar Alarm System

To build a homemade burglar alarm, quite a few components are required. These can be broken into two groups;
1.) Main parts: Parts that are needed for the system to function such as the sensor, control unit and keypad.
2.) Miscellaneous parts such as a screwdriver, pliers, soldering machine, multimeter, screws, and cable for mounting the parts of the house alarm system.
Let’s take a look at the parts mentioned above in more detail.
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2015年5月26日星期二

How Social Security Tax Works

Exceptions and Exemptions

There are certain situations when you don't have to pay Social Security taxes on your income. The most common is when you're retired or disabled, and some portion of your salary comes from Social Security itself. This is where things get a little complicated.
You never pay taxes on more than 85 percent of your Social Security income -- no matter what. So if you received $10,000 in benefits in a year, you'd have to pay 6.2 percent of $8,500. Here's how the tax rate breaks down for different people in different situations:
  • If you file an individual tax return, you could pay taxes on up to 50 percent of your Social Security benefits if your combined income is between $25,000 and $34,000.
  • If you file an individual tax return, you could pay taxes on up to 85 percent of your Social Security benefits if your combined income is more than $34,000.
  • If you and your spouse file a joint tax return, you could pay taxes on up to 50 percent of your Social Security benefits if your combined income is between $32,000 and $44,000.
  • If you and your spouse file a joint tax return, you could pay taxes on up to 85 percent of your Social Security benefits if your combined income is above $44,000.
  • If you're married, but you and your spouse file separate individual tax returns, you could pay taxes on up to 85 percent of your Social Security benefits regardless of income levels.
What's your combined income, anyway? That's your adjusted gross income (income minus tax deductions) plus nontaxable interest (from bonds and other financial instruments) plus 50 percent of your Social Security benefits. This might seem confusing, but just remember that the term "combined income" has nothing to do with whether or not you and your spouse filed individual returns. It's just the sum of all your various sources of income and half of your Social Security benefits.
There are a few other exceptions to Social Security tax laws. Members of certain religious groups don't have to pay, but they don't receive benefits either. Some government employees have their own retirement and insurance systems, so they don't pay into or draw benefits from Social Security. Income below certain earning thresholds isn't subject to the tax, either. The exact amount depends on the job -- it's different for self-employed people, election workers and live-in maids, for example. Many student jobs are exempt, including Federal Work Study jobs and graduate student stipends
To qualify for full Social Security retirement benefits, you need to have at least 10 credits in the Social Security system. How do you earn credits? You earn one for each quarterly period that you work and contribute to the system, but there's a minimum amount you must earn to receive the credit. The amount changes each year. The minimum amount needed to earn a credit in a quarter in 2010 was $1,120. To get the yearly maximum of four credits, you need to have earned $4,480 in 2009. Note that the term "quarter" is somewhat archaic, since the government doesn't count separate quarters anymore. Your income is counted for the entire year, and you get one credit for each $1,120 you earn, up to a maximum of four credits each year. It doesn't matter when in the year you earned that income. If you make $5,000 in January, you'll still get four credits for that year. If for some reason you need to collect Social Security before you have a full 10 credits, you may get some reduced benefits.
How much will you receive in retirement benefits? The amount is first based on your average wagesover the 35 years of your life in which you earned the most, adjusted for inflation. It's then adjusted based on when you retire. You can retire as early as age 62, but you'll receive reduced benefits. You have to reach full retirement age to get the full benefits -- this age is between 65 and 67, depending on when you were born. You can even delay retirement beyond full retirement age to get increased benefits [source: socialsecurity.gov].
If you're wondering how many credits you have, the Social Security Administration sends an annual statement to everyone over the age of 25 who has paid into the system. It will explain how many credits you have earned so far, what your benefits would be under your current number of credits and your earnings for each year you've paid into the system. If you're already retired and receiving Social Security benefits, your statement serves another important function: It shows you the exact benefits you received in a given year, which you can use to calculate your combined income.
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How Social Security Numbers Work

In the United States, the nine digits that make up your Social Security number (SSN) may be the most important numbers in your life. You are required to apply for your SSN when you start your first job, and it stays with you from then on! We use our SSNs daily, although many times we don't even know it.
Important as it is, we may not know much about the origin of our specific number and how SSNs generally came to be. We certainly do know we don't want other people using our SSN as their own, especially not 40,000 other people, as happened to one woman we'll discuss a little later!
In this article, we'll tell you about about how the Social Security program began and answer some common questions regarding SSNs. We'll also tell you what to do if your card is lost or stolen and how you can deal with and prevent Social Security fraud. But first, we'll tell you what your numbers are for, what they mean and how you get the specific number you'll have for the rest of your life.
In the United States, the nine digits that make up your Social Security number (SSN) may be the most important numbers in your life. You are required to apply for your SSN when you start your first job, and it stays with you from then on! We use our SSNs daily, although many times we don't even know it.
Important as it is, we may not know much about the origin of our specific number and how SSNs generally came to be. We certainly do know we don't want other people using our SSN as their own, especially not 40,000 other people, as happened to one woman we'll discuss a little later!
In this article, we'll tell you about about how the Social Security program began and answer some common questions regarding SSNs. We'll also tell you what to do if your card is lost or stolen and how you can deal with and prevent Social Security fraud. But first, we'll tell you what your numbers are for, what they mean and how you get the specific number you'll have for the rest of your life.
Generally, the term social security describes a program that uses public funds to provide a degree of economic security for the public. The specific social security discussed here is the United States government program established in 1935 that provides old age, disability, and survivors insurance, as well as supplemental security income, an income for elderly or disabled people.
n the United States, employers and employees are required to pay Social Security taxes. The money raised from these taxes primarily goes to providing benefits for those who have reached retirement age or are otherwise currently eligible. In this way, today's workers provide funds for the people drawing benefits today, and when today's workers retire, the workers of that time will (at least theoretically) provide the funds. You receive Social Security benefits based on the amount of Social Security taxes you have paid, which, up to a certain maximum amount, is based on your income. People who have had greater incomes tend to get greater Social Security benefits. But Social Security also pays a disproportionate amount to people earning low incomes. They need the money more, and a dollar they pay in Social Security taxes provides them higher benefits than a dollar paid by a high-roller. In this way, Social Security in principle provides for those in need.
Social Security reform is in the news pretty consistently. This is beyond the scope of our discussion here but you can learn more about Social Security reform at the Social Security Reform Center. See also How does the Social Security system work?.
The original and essential purpose of SSNs is to keep track of the money you put into the Social Security program so that you can get the benefits you're entitled to. The government needs lifelong, unique identity numbers to keep track of people's payments throughout an entire working life, no matter how often we move or change occupations or even change our names.
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How Social Security Works

The U.S. Social Security system has been in the news a lot lately. While politicians throw around dramatic words like "crisis" and "bankrupt," regular Americans have more mundane concerns. How will they pay their bills when they retire? What happens if they are disabled and unable to provide for their families?
Social Security is a system that attempts to address all these issues and more. From its roots in the Great Depression, Social Security has changed with the times to try and help poor, out-of-work, disabled and elderly Americans. Whether the system is truly in crisis or not, it will surely have to change in the coming decades as the number of retirees increases relative to the number of workers.
Social Security is a far-reaching system, offering many types of benefits. In this article, we'll focus on the retirement- and disability-benefit aspects of the Social Security system. We'll find out how Social Security got started, how it works today and what might happen in the future if we don't make some changes.
Most Americans are covered by some form of Social Security. Exceptions include some government employees and railroad workers, who are covered by other programs, and certain agricultural and domestic workers. But chances are, if you are a U.S. citizen and you work in the United States, you receive a statement in the mail every year that looks something like this:
If you receive this statement, it means that you are paying a certain percentage of your salary into the Social Security system -- and the idea is that you will get this money back once you retire so you have some extra money to live on once you stop receiving your paycheck.
In the next section, we'll look at the different types of Social Security benefits.
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How to Install a Home Security System for youeself home

Some home security systems are complex and should be installed by a professional. However, there are many good home security systems sold in kit forms that can be installed by any do-it-yourselfer. Most simple systems use a bell, loud buzzer, or other sound source to note intrusion.
Installation involves mounting the sound source or sounder in a location where it can be easily heard. Then attach a circuit of switches to the sounder and connect a battery to the system. Since the sounder operates from the battery, it remains an effective alarm system even in the event of a power failure. Alternately, battery-operated remote wireless sensors and controls can be installed. However, make sure that batteries are replaced regularly.
In electrical terminology, this alarm system is called a closed-circuit system. When the doors and windows are shut, the attached switches are closed. Because all the switches are in a wiring loop, opening any one of them breaks the loop and triggers the sounder circuit. Simply closing the door or window, moreover, does not restore the switch loop circuit continuity and does not stop the sound until either the battery becomes exhausted or someone switches off the circuit from battery to sounder.
There is an electronic switch built into the sounder. This switch is turned on by breaking the magnetic-switch loop. A key-operated switch in the sounder circuit allows you to turn the alarm system completely off when it is not needed. Also, once the alarm goes on, operating the key switch is the only way to silence the sounder. Only someone who has a key to the switch can reset the system.
The switch device consists of two parts that look much alike: one small plastic box that contains a strong magnet, and another that contains the actual switch. When magnet and switch are not near each other, the switch contacts are separated and the switch is open. On the other hand, when the magnet and switch are near each other, the switch contacts move together and the switch closes. The magnet part of the device is screwed to a door or window, and the switch part is screwed to the door or window frame. Thus, opening a door or window separates magnet from switch, causing the switch to open and trigger the alarm.
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2014年11月27日星期四

How to Install Patrol Car Emergency Lights

How to Install Patrol Car Emergency Lights

Patrol cars benefit from compact, lightweight lights. LED (light emitting diode) technology provides cost savings over halogen, since the bulbs don't need to be replaced. The lights are small, quiet and supply more light-power than older halogen rotating beacons and strobe solutions. Clear lightheads mean the lights can be less conspicuous, too. One of the simplest and most economical locations for patrol car emergency lights is on the rear deck straddling the third brake light. The location is weatherproof and highly visible when the emergency lights are illuminated.

Instructions
1
Remove the rear seat and pry the brake light off the rear deck with a flat-head screwdriver. Disconnect the brake light wire by pulling it off with a set of pliers. Remove the fasteners that secure the deck and remove it.

2
Position the patrol car emergency light bracket behind the brake light 1/8-inch from the indentation left by the third brake light.



3.Run a red positive wire from the fuse block to the rear deck and fuse it with an appropriate fuse -- many lights use 5 Amps. Run a black, negative wire to the rear deck. Add a switch halfway along adjacent to the driving position.

4
Drill mounting holes into the deck with a 9/32-inch bit. Drill a hole for the wires with a 1/2-inch bit and secure the bracket to the deck with the included hardware. Then re-install the deck and the third brake light, reconnecting it. Feed the emergency lights wires through to the switched power source. Clip the emergency light to the bracket and re-install the patrol car rear seat.

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How to Design an LED/IR Lamp Flasher Circuit

How to Design an LED/IR Lamp Flasher Circuit

(Reference 1) You can easily put an LED flasher together with a 555 integrated circuit (IC) timer and a few outboard parts. You can choose any color LED, including the infrared (IR) varieties. The 555 is a versatile timing pulse generator, producing variable-width pulses. On its own, it provides up to 600 milliwatts of drive power---perfect for small-to-medium LED flasher projects. The 555's low cost and simple connections means you can build this project inexpensively in under an hour.

Instructions
1
Examine the 555 timer's data sheet, especially the application notes for astable operation. A timing network of 2 resistors and a capacitor determine the 555's frequency and duty cycle. The duty cycle is the percentage of time the timer spends in the "on" state at each cycle. This isn't usually a critical value for a flasher project, though you'll probably avoid very small or large percentages.

2
Determine a flash speed for your project. Most LED flashers work at about 1 cycle per second, but the 555 can run anywhere from minutes per cycle to several thousands of cycles per second. Select a capacitor 10 microfarads, for example. Calculate resistances for the two resistors, Ra and Rb using the following formula:
F = 1.44 / (C x (Ra + 2Rb))
Where F is frequency in hertz, C is the capacitor's value in farads, and Ra and Rb are the ohm values for two resistors. If you want a frequency of 1 Hz, and using 10 microfarads for C, gives you a total of 144,000 for Ra + 2Rb. You can satisfy this by setting Ra = 100K ohms and Rb = 22K ohms.


3.Insert the 555 timer into the prototype breadboard. Work the chip in slowly and make sure the pins go straight into the holes. With the battery disconnected from the battery clip, wire the 9-volt battery clip into the breadboard so that the positive (red) lead goes to pin 8 of the 555 IC and the negative (black) lead goes to pin 1.

4
Insert the capacitor into the breadboard. If it's an electrolytic capacitor, insert the negative lead so it connects to pin 1 of the IC. The positive lead goes to pin 6. Insert a jumper wire to connect pins 4 and 8 together. Insert another jumper wire to connect pins 2 and 6. Insert the 100K ohm resistor Ra so that one lead connects to pin 8 and the other lead goes to pin 7. Insert the 22K ohm resistor Rb so that one lead connects to pin 7 of the 555 and the other lead connects to pin 6. Insert the LED into the breadboard so that its anode connects to pin 3 of the 555 and the cathode connects to one lead of a 150 ohm resistor. Connect the other resistor lead to pin 1 of the 555.

5
Double-check your connections, then connect the 9-volt battery to the clip. The LED should start flashing immediately.


Tips & Warnings

Experiment with different values of Ra, Rb, and the capacitor to alter the flasher's speed and duty cycle.
If you want to drive a string of LEDs, or use high-brightness LEDs, you may need to add a transistor to the 555's output at pin 3. The transistor's higher current rating will handle the increased load.




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