How to fit an LED transformer / driver

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Some LED's just won't dim, or dim well. If it didn't say dimmable on the package, it probably isn't. G9's are typically 120v, so they shouldn't need a driver unless you bought something that is low voltage (12 or 24v). You may need a better or worse dimmer.

First check with the lamp manufacturer. If they are reputable they will have a list of commonly available Dimmers and the model you should use.

Second check the dimmer doesn't have a minimum load requirement. Many "Smart" dimmers (fade on / fade off / preset types) have a minimum wattage you have to come up to before they will work properly.

If all that pans out, you still could only get a small dimming range. Smaller LED lamps like G9 may only dim about 50% and you may get flickering at it's highest and/or lowest setting.

If there is no suggested dimmer, than try are really cheap slide or dial dimmer. Most cheap LED's were designed to work with the most basic dimmer. If that doesn't work, you may...

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Welcome to this InStyle LED video. In it, we’re going to show you how to set up and use the LED power supplies in InStyle’s TRIAC dimmable transformer range.

TRIAC dimming – sometimes called mains dimming – is a simple way to manage your dimmable LED lights. Once your LED lights are wired to the output of a TRIAC transformer, you’ll be able to simply connect its input to many standard household mains dimmer switches. (We recommend Aurora’s AU-DSP400X dimmer module and Varilight’s V-Pro series.)

You’ll need the following equipment:
- A TRIAC dimmable transformer
- A compatible LED dimmer
- White or single-colour LED tape
- Screwdriver

Now you’re ready to set up your TRIAC transformer:

Step 01 – wire the mains supply to the transformer’s inputs. Neutral / Earth leads should be connected directly; Live lead passes through the LED dimmer unit.

Step 02 – wire the LED tape to the transformer’s output. Positive (red) cable goes to...

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If you’re installing a wireless (radio-frequency) dimmer or controller to control your LED strip lights, then you will also need a suitable LED receiver.

LED receivers pick up the signals sent by your wireless dimmer or controller, and pass them forward to your LED tape. Most receivers will let you control your LEDs from a range of up to 20 metres, enabling you to adjust colours, dim, switch on/off or run preprogrammed lighting effects (depending on the type of wireless controller you’ve installed).

Each LED light-colour you wish to control needs its own channel. So a white or single-colour LED tape can be controlled by a receiver with just one channel, while a colour-changing RGBW LED tape will require a receiver with four channels (one each for red, green, blue & white).

1. How to wire a receiver for single-colour LEDs

Use a single-channel LED receiver for your white or single-colour LED tape installation. (These are sometimes called ‘dimmer...

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Some sort of outdoor, landscape lighting is needed in many residential and commercial areas. Whether it just be small security lights, pathway markers, or just added accent lighting around the grounds, they run on a certain system and if you plan on switching to LEDs you will need to be aware of this. Most outdoor lighting systems run off of a low voltage AC transformer, usually 12VAC. These 12VAC transformers are already in place in the majority of houses and businesses as incandescent bulbs could take AC power and it had advantages over going straight from the main line (120VAC). When switching to LEDs this can be a problem as LEDs need direct current, and most LED drivers are made for low DC voltage or high AC line voltage. Here at LEDSupply, however, we have the perfect driver option for landscape and outdoor lighting systems that utilize a low voltage AC transformer.

Some of you may be asking, why switch to LEDs if my old system is working fine? Some of you may...

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By Mark Warburton, Ivory Egg.

It is an odd phenomenon that we spend a lot of time creating as much light as possible in a building, be it from architectural features, lighting effects such as fires, or general lighting, only to spend countless time and energy dimming it down to a suitable and aesthetically-pleasing level.

Evolution of artificial light sources.

With the transition from incandescent light to light-emitting diode (LED), it is not safe to assume that this process will be problem-free, and with such a wide range of light fittings in the market, how can you guarantee a satisfactory result for your customer?

To better understand the issues, let’s briefly look at how LEDs work and then look at some examples of the best method of control.

LED Lamps

Like any diode, an LED allows current to pass through it in one direction only. Diodes can be used to convert AC current to DC, but an LED is typically used with a DC current.

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Before undertaking any of the alterations below turn off the electricity supply. If unsure, consult a qualified electrician


Step 1 - Establish your lamp type and bulb fitment.

240v input GU10 looks like this (twist fitting)

12v input MR16 looks like this (push fitting)

Step 2 - Remove existing bulbs

Step 3A - Installing new GU10 fitment lamps

For GU10 fitment lamps, simply fit the LED replacement, which twist fits into the existing lamp holder.

You should check the dimensions for your choice of LED lamps before you buy as some LED lamps are slightly longer than standard halogen bulbs. Longer LED lamps will often fit fine so long as your lamp holders have flexible GU10 connectors and there is space for the new LED lamp to push up into the fitting.


Flexible GU10 connectors look like this.....


Note that some lamp holders have a fixed GU10 socket (like below), in...

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Look inside any kitchen, bedroom, hallway or living room, and it’s highly likely that you’ll be presented with at least one - if not a cluster - of tiny spotlights nestled neatly in the ceiling.

Spotlights have enjoyed a monumental surge in popularity in recent years, and with good reason. They’re modern, easy to replace and above all, versatile.

The key to a spotlight’s versatility lies in its colour and beam angle. Wider beam angles and warmer colours are great for ambient lighting, where the light is dispersed over a wider area. Cooler colours and narrower angles are ideal for highlighting specific fixtures or areas of a room, which is particularly useful in commercial or public settings.

What are LED spotlights?

Since its rise to prominence, LED technology has rapidly permeated almost every rung of the lighting industry, and LED alternatives to nearly every light bulb design are now widely available. Spotlights are no exception.

Put simply,...

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This article was published in the February 2012 issue of LEDs Magazine.

View the Table of Contents and download the PDF file of the complete February 2012 issue.

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There is an enormous potential market for LED-based retrofit alternatives for legacy MR16 bulbs. But the varied electronic and magnetic transformers used to drive the halogen incandescent filaments in the legacy lamps aren’t a good match for LEDs. For lamp makers to deliver drop-in, solid-state lighting (SSL) replacement lamps and the energy savings and long life afforded by LEDs, the lamp designers will have to develop a universal driver circuit. An inverting buck-boost topology appears capable of the low-voltage MR16 challenge.

In terms of installed units, few sockets can rival the MR16 halogen light bulb. MR16s can be found in homes, offices, hotels and retail shops. There are actually two classes of such lamps (shown in Fig. 1). The lamp on the left has GU-5.3 pins...

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When you need to convert voltages, you almost always need a transformer or inductor of some sort, at least if you want to do it efficiently. Linear power supplies will use a large 60Hz iron core mains transformer, switchmode power supplies and commercial LED drivers will more often than not use a small ferrite or iron powder transformer.

However, if you do not need a lot of current, using a small high voltage capacitor in series with the full bridge rectifier should work, the capacitor will impede the current, and the rectifier will give the LED the DC that it needs. (it should be noted if you choose to do this, that it is very dangerous, and you need to use the right type of capacitors, and there will be some math involved.)

A better solution would be to use high voltage LEDs specifically designed to be driven with mains voltages. CREE has some good really efficient high voltage LEDs, and there are these things called "LED filaments" which are really...

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Different purpose, different light
How do you know when to use an integrated LED light, and when to go for a retrofit LED bulb?

Often more decorative light fixtures, such as wall and pendant lights, are best suited to retrofit LED lamps. The designers of such light fixtures are often more concerned with aesthetics than thermal management, so design them with regular fittings. The easiest route here is to go for a (high-quality) retrofit bulb.

For architectural light fittings, such as downlights, uplights or accent lights, a top-quality integrated LED fitting is the best way to go. While changing the entire fitting does sound like a lot more work, and would involve an electrician, integrated LED lighting can offer a far superior quality of...

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Hi Brian,
Thank you for your enquiry. Are you considering LED Lamps for your bathroom? We have a good range at http://www.yourwelcome.co.uk these will save you up to 90% of your energy compared to equivalent halogen lamps. You can install mains GU10 LED lamps, no need for transformers, just ensure the metal fitting is earthed. You can install shower rated fittings, which have a safety glass in the bezel, these are necessary in Zone 1 and 2 areas, above the shower or bath and if you can touch them whilst in either, depends how high the ceiling is. Cool white colour temperature lamps work better in bathrooms as they appear brighter and are usually higher in Lumen output than warm white. 1 fitting per square metre is a good guide to coverage, unless you already have cut outs in the ceiling or it is vaulted etc..
If you have any other questions you can email me directly on mitch@yourwelcome.co.uk, anytime.

regards...

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One of the major problems that is to be solved in an electronic circuit design is the production of low voltage DC power supply from AC to power the circuit. The conventional method is the use of a step-down transformer to reduce the 230 V AC to a desired level of low voltage AC. The most suitable and low cost method is the use of aVoltage Dropping Capacitor in series with the phase line.

Selection of the Dropping capacitor and the circuit design requires some technical knowledge and practical experience to get the desired voltage and current. An ordinary capacitor will not do the job since the device will be destroyed by the rushing current from the mains. Mains spikes will create holes in the dielectric and the capacitor will fail to work. X-rated Capacitor specified for the use in AC mains is required for reducing AC voltage.

X Rated capacitor 400 Volt

Before selecting the dropping capacitor, it is necessary to understand the working principle...

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12v LAMP DIMMER
Here is a 12 volt @ 2 amp lamp dimmer that can be used to dim a standard 25 watt bulb by controlling the duty cycle of a astable 555 timer oscillator. When the potentiometer is at the up position, the capacitor will charge quickly through both 1k resistors and the diode, producing a short positive interval and long negative interval which dims the lamp to near darkness. When the potentiometer is at the lower position, the capacitor will charge through both 1k resistors and the 50k potentiometer and discharge through the lower 1k resistor, producing a long positive interval and short negative interval which brightens the lamp to near full intensity. The duty cycle of the 200Hz square wave can be varied from approximately 5% to 95%. The two circuits below show how to connect the lamp to either the positive or negative side of the supply.
This circuit may or may-not work
The 555 will sink 300mA and it can be connected ...

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I am often asked how upgrading an amplifier’s transformers will improve tone. It’s a simple enough question, but the answer is a little complex. First off, let’s examine what an output transformer is and why someone would inquire about replacing it. Then we’ll get to some things to consider when replacing your amp’s transformer.

The output transformer in a push-pull guitar amplifier is the last stage of the audio path before getting to a speaker—it’s one of the large blocks of metal mounted to the amp chassis (or speaker, as is sometimes seen in older amps). The transformer’s function is to convert the high-voltage/low-current signal from the amplifier’s power tubes into a low-voltage/high-current signal to power the speakers at a low impedance. It is responsible for how efficiently the audio power of an amp will transfer to the load of the speakers, and it prevents hundreds of volts (DC) from passing to the speakers.

There are different reasons why a person would...

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LED Drivers, also commonly known as LED transformers or power supply transformers, are used to regulate the levels of electricity flowing through an LED device to achieve the optimum life span for it. Most LED?s are a low-voltage light source. LEDs can be used individually or in an array. When used in an array, the voltage becomes higher.

LEDs are prone to fluctuation which can cause a disproportionate change in current flow and brightness. This can make the output degrade faster than intended and therefore provide a shorter life span for the LED or bulb. An LED driver can regulate the flow of current in LED devices, therefore keeping them at a steady rate and allowing them to maintain their most sufficient life span.

LED drivers are suitable for use with fluorescent lights, MR16 and MR11 bulbs and LED lights. The drivers can be used with bulbs of 6W, 12W, 18W, 30W, 50W and have an input voltage of between 220v and 240v, 50-60Hz. The output voltage can range between...

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LEDs are low-voltage light sources, requiring a constant DC voltage or current to operate optimally. Operating on a low-voltage DC power supply enables LEDs to be easily adapted to different power supplies, permits longer stand-by power, and increases safety. Individual LEDs used for illumination require 2-4V of direct current (DC) power and several hundred mA of current. As LEDs are connected in series in an array, higher voltage is required.

In addition, during operation, the light source must be protected from line-voltage fluctuations. Changes in voltage can produce a disproportional change in current, which in turn can cause light output to vary, as LED light output is proportional to current and is rated for a current range. If current exceeds the manufacturer recommendations, the LEDs can become brighter, but their light output can degrade at a faster rate due to higher temperatures within the device which leads to a shorter useful life. One definition of useful...

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Index

Benefits of LED Lighting Explained What is LED Lighting? LED Comparison Guide - LED vs Halogen vs Incandescent LED Lighting Colours LED Beam Angles Explained Why all the Hype of LED? Will LED globes fit in my current fittings? LED Transformers Explained Car LED Lights, Boat LED Lights and Caravan LED Lights I hear Some people say LED is too Expensive!

Benefits of LED Lighting

LEDCentral.com.au is one of Australia's premium online suppliers of LED lighting. We specialise in high quality LED lighting alone, because not only do we believe in the massive benefits of using this new energy efficient light source, we are here to pass the savings on to you.

LED lighting is a new technology and as with any type of new technology, there are limited suppliers of really high quality Australian certified LED Lights, for a reasonable price. We are committed to bringing not only the best quality globes to our online store for consumers, but at a price of up to 40% less...

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The DCJolly 350mA is a revolutionary multi voltage power supply which allows LEDs to be dimmed from any 0 - 10V / 1 - 10V dimming system.

A series of dipswitches gives the user the option to flick the output to any of the following voltages (and maximum loads):

Standard 0/1-10V Dimmer

This is the most popular type of dimmer used with this interface as it is most commonly used in the home and will easily fit into existing back boxes. A 1-10V Wired Dimming Switch and 1-10V High Frequency Dimmer Module for creating your own switch plate are available.

Lutron 0/1-10V Dimmer

This wired dimming switch has the same functionality and wiring as the standard 0/1-10V dimmer. Ideal for use where other Lutron switches are used and complimentary switches are required.

Wise Wireless Dimming 0/1-10V

Any Wise switch can be used in conjunction with this interface to control your Seamless DimLine/DimSlim. A WisePack 0-10V Dimming is required and...

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As with most things, this is a subject that gets more involved the more you get, err, involved. I won't begin to pretend that I'm an expert on this subject, but I've worked on projects with friends who are, and they've been installing very expensive LED lighting systems into large hoses, and in a nutshell, it's a bit of a science.

As I say, I don't know much, but I'll tell you what I know...........

Halogen.
12v MR16 gives a nicer light than 240V GU10. There's not a huge amount in it, but it's a difference all the same. GU10 used to have a habit of tripping breakers when they "blew". They would also kill cheap dimmers sometimes when they blew. They now tend to stretch the filament over a "pinch" in the lamp glass which stops them shorting when they blow. Lamp life can be variable with both. In the case of 12v lamps it's dependant on the quality of the transformer and whether it "soft-starts" the lamp. GU10's are hard started all the time, which is when they are...

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