Everything You Need To Know About LED Lighting

A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows – characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semiconductive materials such as silicon or selenium – substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).

  1. What is LED Lighting?

A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photovoltaic cell (a device that converts visible light into electrical current).

Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.

  1. How Do LED Lights Work?

It’s really simple actually, and very cheap to produce…which is why there was so much excitement when LED lights were first invented!

The Technical Details: LED lights are composed of two types of semiconducting material (a p-type and an n-type). Both the p-type and n-type materials, also called extringent materials, have been doped (dipped into a substance called a “doping agent”) so as to slightly alter their electrical properties from their pure, unaltered, or “intrinsic” form (i-type).

The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).

Application of the Technical Details to LED Lighting:

When an light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay – known as the peak inverse voltage – a point that if reached, will irreversibly damage the device).

While all of this might sound incredibly technical, the important takeaway for consumers is that LEDs have changed the lighting landscape for the better, and the practical applications of this technology are almost limitless.

 

http://www.stouchlighting.com/blog/all-about-led-lighting-what-does-led-stand-for

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Why Is Generator Maintenance Important?

Generator Maintenance

You may have heard that you should be performing maintenance tasks on your generator at least once a year. Maybe you have fallen behind and forgotten about your generator for a few years. You may be wondering why generator maintenance is so important. Keep reading to find out the benefits to performing generator maintenance tasks.

1. Keeps your generator running when you need it most

You most likely have a generator on your property to use in the event of an unexpected power outage. Of course, you want your generator to be working when you need it most. When the power goes out unexpectedly, that is the last time you would want to find out there is an issue with your generator. If you perform generator maintenance tasks you will ensure that your generator will run when you need it.

2. Prevents fuel problems

Without proper maintenance generators are more susceptible to fuel problems like algae build up on the fuel system, clogged fuel injectors, and dead batteries. These types of problems can even ruin your generator itself if they are let go for too long.

3. Saves you money in the long run

Although ignoring generator maintenance may save you a few bucks in the short-term, if you ignore maintenance for too long you will end up with costly repairs in the long run. You might even have to replace your whole generator unit.

4. Keeps your generator running for longer

A generator can be a large expense, and one you don’t want to make too often. By keeping your generator properly maintained you will be able to keep your generator running smoothly for longer than if you ignored maintenance tasks.

5. Increases efficiency

If you do have to run your generator, of course you would want it to run efficiently as possible. Generator maintenance tasks help your generator to reach its highest efficient potential.

Overall, generator maintenance will help to keep your generator in mint condition for years to come. This in turn, will save you time and money.

 

http://electricaltestingsolutions.com/index.php/articles/41-why-is-generator-maintenance-important

Top 7 Generator Maintenance Tips

By Dorit Sasson

A generator can last for decades but it needs proper maintenance. Just like it’s important to eat healthy and exercise, a generator also needs maintenance to prevent it from breaking down. The better the maintenance, the longer your generator will function without the need for extensive repairs, which can translate into serious cash from purchasing expensive parts or even replacing the whole unit. Read on for seven top maintenance tips to ensure that your electrical generator is safe and ready to go when the power runs out.

Purchase a warranty or backup generator

This may seem pretty self-explanatory, but investing in a warranty might be the best thing to protect yourself when power runs out as generators aren’t cheap. Get to know the coverage; it might be full or partial. Investing in a back-up generator can also help control your home insurance costs as well.

Invest in a cover or an enclosure

Electricity is susceptible to water and the slightest rainfall might damage a part that might cost a pretty penny. Depending on whether your generator is a standby model or portable, you’ll want to invest in either a cover or an enclosure. Another suggestion is to build a generator garage similar to that of a doghouse for a portable generator.

Prevent motor burn-out

Use heavy-duty cords for less voltage use which can also prevent premature burn-out. Lighter cords increase the voltage. And since generators are noisy, you might be better off investing in a longer cord for uninterrupted sleep.

Power up your generator every three months

Manufacturers recommend running generators every three months for about 30 minutes to charge the battery for the electric starter. The last thing you’ll want is to discover that your electric starter isn’t working in time of need.

Fill up your tank

Avoid damaging your generator by keeping your tank filled with gas. When a generator runs out of gas, they stop power while the electrical load in your home will suck the magnetic field from the generator itself.

Keep oil and filters plentiful

The last thing you want to be doing is shopping for a new oil or filter during a long power outage, so keep a supply of oil and filters.


Do your homework

You don’t want to purchase a generator that will exceed the maximum capacity that your generator is able to put out. Be sure to read the ratings before buying a generator — there’s the higher “maximum” or “starting” rating or the “rated” or “continuous” watts. If you buy a generator for the higher power level, it will only work for a short time and at that level. But at the end of the day, that generator won’t extend its running capacity, and off you’ll be — running to find a new generator.

As you can see, a generator can be a lifesaver in times of prolonged periods of power outages. And when you take care of your generator, it gives you and your family the right peace of mind.

https://www.huffingtonpost.com/dorit-sasson/top-7-generator-maintenance-tips_b_9292748.html

Energy Savings at Home

Maintenance Checklist

Maintain your equipment to prevent future problems and unwanted costs. Keep your cooling and heating system at peak performance by having a contractor do annual pre-season check-ups. Contractors get busy once summer and winter come, so it’s best to check the cooling system in the spring and the heating system in the fall. To remember, you might plan the check-ups around the time changes in the spring and fall.

A typical maintenance check-up should include the following.

  • Check thermostat settings to ensure the cooling and heating system keeps you comfortable when you are home and saves energy while you are away.
  • Tighten all electrical connections and measure voltage and current on motors. Faulty electrical connections can cause unsafe operation of your system and reduce the life of major components.
  • Lubricate all moving parts. Parts that lack lubrication cause friction in motors and increases the amount of electricity you use.
  • Check and inspect the condensate drain in your central air conditioner, furnace and/or heat pump (when in cooling mode). A plugged drain can cause water damage in the house and affect indoor humidity levels.
  • Check controls of the system to ensure proper and safe operation. Check the starting cycle of the equipment to assure the system starts, operates, and shuts off properly.

Cooling Specific

  • Clean evaporator and condenser air conditioning coils. Dirty coils reduce the system’s ability to cool your home and cause the system to run longer, increasing energy costs and reducing the life of the equipment.
  • Check your central air conditioner’s refrigerant level and adjust if necessary. Too much or too little refrigerant will make your system less efficient increasing energy costs and reducing the life of the equipment.
  • Clean and adjust blower components to provide proper system airflow for greater comfort levels. Airflow problems can reduce your system’s efficiency by up to 15 percent.

Heating Specific

  • Check all gas (or oil) connections, gas pressure, burner combustion and heat exchanger. Improperly operating gas (or oil) connections are a fire hazard and can contribute to health problems. A dirty burner or cracked heat exchanger causes improper burner operation. Either can cause the equipment to operate less safely and efficiently.

Actions To Do Yourself

  • Inspect, clean, or change air filters once a month in your central air conditioner, furnace, and/or heat pump. Your contractor can show you how to do this. A dirty filter can increase energy costs and damage your equipment, leading to early failure.

https://www.energystar.gov/index.cfm?c=heat_cool.pr_maintenance

How Does a Generator Create Electricity? How Generators Work

Generators are useful appliances that supply electrical power during a power outage and prevent discontinuity of daily activities or disruption of business operations. Generators are available in different electrical and physical configurations for use in different applications. In the following sections, we will look at how a generator functions, the main components of a generator, and how a generator operates as a secondary source of electrical power in residential and industrial applications.

How does a generator work?
An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output.

It is important to understand that a generator does not actually ‘create’ electrical energy. Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit. This flow of electric charges constitutes the output electric current supplied by the generator. This mechanism can be understood by considering the generator to be analogous to a water pump, which causes the flow of water but does not actually ‘create’ the water flowing through it.

The modern-day generator works on the principle of electromagnetic induction discovered by Michael Faraday in 1831-32. Faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field. This movement creates a voltage difference between the two ends of the wire or electrical conductor, which in turn causes the electric charges to flow, thus generating electric current.

http://www.dieselserviceandsupply.com/How_Generators_Work.aspx