Batteries can be used when testing out the modes equipment or project but this can become rather expensive in long-term. Larger items of projects or equipments are often unstable for battery operation even just for testing purposes because it also requires a mains power supply of some sort because it is one of the essentials.  

The unit described here provides an output voltages which is adjustable over range of a little more than 5 to 30volts. The maximum output of current can be either 500mA or 1 amp depending upon the mains transformer used.

Output current limiting is incorporated in the design which is therefore capable of withstanding output short-circuits without sustaining any damage. With the maximum output voltage there is a drop in the output potential of only about 600mV.

When  the output current is taken from zero to full load. This is not as good as the most sophisticated of laboratory power supplies but is much more than adequate for normal amateur requirement.

Current Limit Circuit

There is quite a high risk of output short-circuit occurring with a general purpose work shop power supply such as this one and it is virtually essential to incorporate some form of electronic output over load protection circuit. Ordinary fuses are not really suitable as they would probably not act fast enough to protect the output circuit and it would be costly and time-consuming to keep replacing them anyway.

In this circuit the type of overload protection that is employed is output current limiting. This is where the output current is limited to a value which is approximately equal to the design maximum output current of the supply, even if a short-circuit is applied to the output. The supply is unaffected by the current limit circuit until the limit current is reached.

Construction

One advantages of this simple type of regulator over most of the more sophisticated types. Configurations that it cannot become unstable and that the component layout is not critical. However, remember that fairly heavy or large amount of current can flow in certain parts of the circuit and connecting wires must be adequate to handle these currents. If the unit is housed in a metal case this must be connected to the ground. In fact, any expose metal parts must be properly grounded and insulated.

Some Tips Before Handling Electrical Devices

Be very careful when handling high voltage components such as transformer and capacitors.  Capacitors and Transformer has capability to store electrical charges.

DO NOT work if you are exhausted or in a rush. Twice ascertain every thing before connecting your circuit to the mains and be prepared to disconnect it if certain thing examines wrong.

DO NOT touch any fraction of the circuit as shortly as it is beneath power.

DO NOT work with moist hands. If you are wearing a flexible chain of bonds, necklace or any kind that may be securing and contact an uncovered part of the circuit  be careful. use always correct mains lead with the correct seal and Ground your circuit correctly.

Most of the time, these two words can be seen in different article pages and websites relating to power inverters and other electronic power supplies. These particular words are also frequently being discussed and talked-about in many forums, blogs and classified ads sites.

The question in this matter is, do you know what’s the difference of both words? Using the word may or may not break your reputation in or outside the online community. People often used words they didn’t even know what it means or possibly meant when applied in a certain phrase or sentence. These are just simple things you might have done for some time now, but knowing the word itself and how to use them have its positive feedbacks.

The use of the word “Converter”, which is often used as, describing several unrelated pieces of equipments or  performing different functions has added to this already confusing matter. A Converter has a lot of meaning but often times you can really understand what it really meant. For example in electronics, a voltage converter is a device which converts AC Power to DC Power. It changes the voltage of an electrical power source and is usually combined with other components to create a power supply. Some claims also proves that it is also possible to do a AC-DC-AC conversion. The use of the term voltage converter is also known in other electrical term which is power supply. A voltage converter and power supply can also be called as transformer. However, it does not actually pertain to the device called transformer which also has a different meaning.

The word “Inverter” in electrical terminology, according to the online encyclopedia: Wikipedia, is defined as an electrical device that converts direct current (DC) to alternating current (AC); the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Another meaning that revolves around this word according to the IEEE definition is, a machine, device, or system that changes direct-current power to alternating-current power. The inverter is the output stage of the power supply, to which the machine is directly connected in any type of drive system including an AC motor. The DC input to the inverter comes from some kind of rectification apparatus taking its input from in the AC line.

Today, knowing how the function of the device will tell you what term can properly describes it best rather than making use of the word while not knowing what it is and how to use them properly. In this way, you can claim respect within the community and other particular party you are involved with.

Determining Why Do We Need Power Inverters?

Why do we need Power Inverters? A lot of people nowadays are traveling overseas and buying stuffs. One of the stuffs they buy are electrical appliances and other electronic devices. Some electrical appliances require AC (Alternating Current) High Power source (110VAC for European and Western Country, 220VAC Asia and Middle East County) that’s why we need power inverters.

Some Of The Uses Of Power Inverters:

Camping.

Camping With Your Rover “RV”s at parks that do not provide electricity, A TV, toaster, Blender, Refrigeration unit For your Food and Beer, Needs a AC power Source.

Emergency Units.

For medical equipment, blood pressure cuff or oxygen monitor, Examination rooms may also have medical equipment such as digital thermometers and nebulizer machines, mostly found on an ambulance.

Power Failures.

In a Black Out or Power Failures, just plug the power inverter in your vehicle. Start the motor and it can run a radio to tune into important alerts, watch TV, play video games and can even run your PC or laptops.

Car Gadget’s Power Source.

You can also use this kind of inverters in a custom vehicle, some of the examples of a custom vehicles are featured on MTV Pimp My RIDE (it’s a reality TV show with rapper, Xzibit and the good people at West Coast Customs where they make people’s cars go from dirt to pimped in this 30 minute show that airs weekly on MTV last year.)

Making your car a one of a kind luxury vehicle should have all sorts of gadgets needed. Some of these gadgets are Flat-screen portable TV, DVD players, Desktop PC, Game Consoles like Xbox, Sony Playstation and Sega Dreamcast, a refrigeration unit and you can even include a sing along system.

All of the things mentioned above need an AC power line so that you can use it. Since the vehicle only provide a 12 VDC to 24 VDC maximum voltage source, you need to provide an AC power source, and the only reliable and most compact ways to implement this kind of sophistication is a Power Inverter.

You could also plug your inverter to a cigarette lighter on the dashboard and there’s your standard power source.

Choosing A Good Power Inverter

• Has About Efficiency of 90%

• Power output ÷ Power input x 100%

• Has A Temperature and overload protection.

Battery over-voltage and under-voltage protection.

With Cooling Fan.

• Portable.

• Totally Silent Operation.

• Low Maintenance.

• Regulated Output To Protect Sensitive Equipment.

Unlike the other two (AC/DC), Pure Sine Wave inverters, Pure Sine Wave Output and Modified Sine Wave – Phase Corrected Output produce a better and cleaner current.

• Economical.

Power inverters doesn’t have to be expensive as long as it is safe and efficient to use. Choosing the best quality but inexpensive power inverter products would be a wise move for buyers.

Choosing The Power Inverter That Matches Your Needs

As the title suggest is pretty much self-explanatory. Choosing the right power inverter that matches what you need is possibly one of the most important thing that you have to do first before buying anything in you typical electronic store or your favorite online electronic shop.

Example:

• TV that Have 75 watts require a 100 watts Power inverter
• 400 watts Toaster Require at least 500 watts Power inverter
• DVD Player Require 100 watts Power inverter.

Do’s and Dont’s When You Have Power Inverters At Home

• Don’t put your power inverter to wet surfaces.

It’s pretty self-explanatory actually, a power inverter is an electrical device and in physics 101, water conducts electricity. Putting any electrical devices near wet or watery surfaces may cause electrocution to anyone near the device.

• Do not plug a 1500 watts appliances to a 1000 watts power inverters.

• Put your power inverters to stable position.

Vibration will shake the component of your power inverter and eventually malfunction due component break down.

• Use standard and insulated wires in wiring your power inverter.

Poor wiring may lead to short-circuit and may cause fire outbreaks.

• Over Loading The power inverter (Maximum Power Limits)

Overloading the power inverter over it’s maximum power limit isn’t a good idea for it may cause it to explode.