5-pin SPDT (single pole, double throw) automotive relay.

Relays are essentially two parts in one package. The first part is an inductive coil (pins 85 and 86). This coil is the “trigger” function of the relay. By applying both a positive (+) and ground (-) to the contacts, current passes through the coil. When current passes through the coil, a magnetic field is generated and moves the switch (the arrow in the diagram). This is where the second part of the relay comes into play.

The second part of the relay is the “switch.” The switch has three interface contacts—common, normally closed, and normally open. “Normally” refers to the state of the relay not being energized.

While relays can be used for virtually any task, there are some very useful, simple applications for adding LED lighting to a vehicle. Please note that this wiring only pertains to the relay—not the wires in the vehicle. Before interfacing with a wire in a vehicle, always ensure you test the wire with a digital multimeter first to confirm circuit function.

Positive Switching

Positive switching is used for applications where the “trigger” for your switch or circuit is positive. This could be an ignition, brake, or reverse light wire for example.  This could be used for applications such as off-road light bars, work lights, additional brake lights, and other exterior lighting.

Negative Switching

Negative switching is used for applications where the “trigger” for your switch or circuit is negative. Negative triggers are often found in door, hatch, and trunk triggers as well as many interior switches. This could be used for applications such as footwell lighting, truck bed lighting, under-hood lighting, and other interior lighting.

Switch Activated With Ignition Override

This is useful for applications where you want to turn your light on or off with a switch but only want the light to remain on when the car is running or key is in the “ignition” position. The main advantage to this is—even if the switch is left on—the light (or output circuit) will shut off when the key is turned off so that the battery will not be run down.

For technical questions, don’t hesitate to call us toll free at 866-590-3533. Our customer service and technical support teams are available from 8:30 a.m. to 8 p.m. CDT Monday-Thursday and 8:30 a.m. to 4 p.m. CDT on Friday.

Most people have air conditioning in their homes and though the temperatures don’t really drop too much even during winter here, there are definitely days on which there is a nip in the air, and if you have tiled flooring, it’s bound to get uncomfortably cold. While heating systems do help solve this problem, many homeowners are now transitioning to radiant heat. This provides very pleasant warmth to your body and feet as it warms the surface of the floor.

These under floor heating systems are suitable for hard floor surfaces such as living rooms, kitchens, entertaining areas, bathrooms etc. Since the air circulation is very gentle, there is a marked reduction in the amount of dust particles that get circulated, it’s a great relief for people that suffer from asthma and allergies.

When you are planning on getting this system installed, it’s important that you hire the services of a well-established and credible company; they will understand what your specific requirements are and then provide you the kind of solutions you need.

This type of heating uses heating cables that are well-embedded in the flooring concrete slab and it provides the right amount of heating. It essentially stores the heat during the night and then slowly releases it during the day and provides continuous warmth.

As you can see, there are a number of other advantages to getting underfloor heating systems installed. For more information, simply speak with the experts at Allround Electrical and take their advice on various aspects of power factor installation solutions. The number to call is – 1300 169 263. You can also write to us at this email address.

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As part of our series on pop culture from 15 years ago – a continuing celebration of our 15th anniversary as Pegasus Lighting – here are 15 moments from March 1999 you may remember. Monica Lewinsky’s book on her affair with Bill Clinton goes on sale; the Dow Jones average beats 1000 for the first time; and The Matrix is released. Ah, the sweet 90s. Where were you?

1. Jar Jar Annoys Basically Everyone

At the Golden Raspberry Awards, better known as the Razzies, the award for Worst Supporting Actor went to Ahmed Best, who voiced the character Jar Jar Binks in STAR WARS: EPISODE 1, THE PHANTOM MENACE. Poor Jar Jar, you-sa not much appreciated by STAR WARS fans.

2. The Worst Picture of the Year

The Roth 401(k) combined elements of the Roth IRA and the traditional 401(k). In a traditional 401(k), you contribute income without paying taxes on it. You then pay taxes on the funds when you withdraw them during retirement. With the Roth 401(k), however, you pay the taxes upfront so that you can withdrawal funds tax-free during retirement.

 5. The Melissa Worm Attacks the Internet

At the end of March 1999, the Dow Jones Industrial Average closed above the 10,000 mark at 10,006.78. This was unprecedented! People made “DOW 10,000” hats and celebrated. In hindsight, people wonder whether that day represented the peak of our economy’s health up to that point or the peak of market excess that was responsible for the economic instability of the 2000s.

7. You Are the One, Neo

Legendary film director Steven Spielberg was once again named Best Director at the Academy Awards for SAVING PRIVATE RYAN. In fact, the director of early 80s movies like E.T. was on a real tear, just coming off of the JURASSIC PARK series and SCHINDLER’S LIST. He continues to direct great movies today.

9. Roberto Begnigni Is Exuberant 

Roberto Benigni won Best Actor for his role in LIFE IS BEAUTIFUL at the 1999 Academy Awards. His reaction immediately became more popular that the movie itself. I’ll have a glass of whatever he’s drinking!

10. Gwyneth Wins Best Actress

SHAKESPEARE IN LOVE was the most awarded film of the night of the Academy Awards. Perhaps the most touching award acceptance, though, was Gwyneth Paltrow’s. Try to watch her acceptance speech without getting teary. I dare you.

11. Lewinsky Tells All

In March, 1999, The Supreme Court of the United States upheld the murder convictions of Timothy McVeigh for the Oklahoma City bombing, which left too many dead and wounded to even go into detail here. It was a tragic and totally unnecessary crime, and the Supreme Court decision echoed the feelings of many Americans.

14. Stanley Leaves Us

On the day after we lost Stanley Kubrick, we lost another beloved American hero, the legendary baseball player Joe DiMaggio. His death was caused by lung cancer. He was 84 and sure saw America from an interesting point of view. The loss of this former star was felt all over the nation.

It’s fun to think back to these moments in the popular culture of 1999, even though not everything that happened was happy. Most of us lived through all these events and remember them well. Come back next month to see what we resurrect next.