Home security surveillance systems have come a long way in the past twenty years and, as the frontline of technology has moved, so the prohibitive price tags on their more sophisticated components have fallen away. Things like nanny cameras have come out of the domain of the rich and famous, and become affordable for ordinary people with day jobs. The same is true of motion detector alarms and door and window alarms.

Magnetic alarm contacts, the twin magnetic pads used to make door alarms, cost less than $4, and are available at the majority of major hardware stores. These contacts are used to form a circuit that's broken when a door or window is opened. They're so easy to install that many people these days are undertaking the job of incorporating them into their home security surveillance system themselves. Of course, if mucking about with silicone guns and tubes of wood glue isn't your bag, security companies such as ADT are usually willing to do the job at minimal cost for their customers (though this will, of course, only apply if you're signed up for their security services).

After contacts, which form the first line of defense after locks when it comes to home security, you'll want to think about beefing up your home security surveillance system with motion detector alarms, which are generally of one of two types, and also tend to be generally cheap (think under 20 dollars). UWB detectors (the acronym stands for ultra-wideband radar) emit a radar signal across a fixed distance. If that signal echoes in a shorter than anticipated time the UWB detector will register the presence of a new object as motion, and sound the alarm.

Passive infra-red (PIR) motion detector alarms have become integral to most everyday home security surveillance systems. They measure the infrared light that radiates from objects within their fields of view. When an object of one temperature, such as person, passes before an infrared source with another temperature, such as a couch, the PIR detector registers that as motion. In this instance, the term 'passive' is used to indicate that PIR detectors do not actually emit a beam of infrared light (you'd need to pay quite a bit more for that), but just passively accepts incoming infrared light.

Nanny cameras have probably evolved the most out of all home security surveillance systems - their footage can be viewed online over your cellphone, allowing you peace of mind even when you're a continent away. In fact, this is an effect you can have with your entire home security surveillance system. Simply install decent webcams covering relevant parts of the house, and you'll be able to see not only your baby but also whatever the nanny might be doing with the house while you're gone.

There is, of course, no reason you shouldn't have your entire home security surveillance system function in this manner. All you need to do is buy up a bunch of webcams and convert them into nanny cameras by putting them in common household objects and ornaments such as clocks and book-bindings. The only requirement is that your ornaments be located within reasonable proximity of a power point. The footage these makeshift nanny cameras capture can be transmitted directly to a storage cluster online, where it will remain, safe and secure, for days or weeks - the only dependency being how much you're willing to pay for the storage space. Keep in mind that an extensive home security surveillance system might require multiple terabytes of space for just a few days worth of surveillance.

Still, this is only cost-effective up to a point. Luckily, there's a simple way to get around the need for making excessively large quantities of storage space one of the costs of your home security surveillance system. All that you need to do is have you motion detector alarms and door and window alarms wired to your nanny cameras. If you set this system up in such a way that the various sensors or detectors set your home security surveillance system recording when there's movement in the house, you'll wind up eliminating the need for redundant recordings of empty rooms. You can also get cameras programmed with motion detection software to begin with - these will actuate this function without the need for any fancy fiddling on your part.

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