LEDs on dimmer, left alone, eventually fade to off


I replaced some halogen bulbs in my recessed cans with some LED retrofit kits

I also replaced the dimmer with a new digital LED dimmer. When I dim the lights down to a low-ish setting, I can wait about 45 mins and eventually the lights will be off. I adjusted the minimum dimming range of the dimmer to something far higher than I want and the bulbs still eventually turn off.

I have the same dimmer in 2 other rooms with different LED bulbs and they work fine. Though, the wiring might be a bit different. The new one doesn't have a ground wire, but from what I've been told, that should matter because the old dimmer didn't have a ground either.

The new lights are also quite loud when fully bright. They have an audible hum that none of my other lights have. Do you think this is a problem with the lights or the dimmer?

I imagine that the hum means the transformer is not converting light efficiently, could that be causing...

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19 December 2010

Author: Giorgos Lazaridis

Some time ago, i made an LED fade out dimmer for my Men Of War game console. The circuit was ridiculously easy, using only one transistor and a couple more passive components. Now, i tried to make a similar circuit, but with a Fade-In Fade-Out cycle (the previous had only fade-out). So, here are some very interesting observations that i made while i was designing the circuit.

A very simple Circuit with a slight flaw

Here is the first circuit schematic that i designed, and i tried to keep it as simple as possible:

Similar to the LED fade out dimmer, multiple LEDs can be connected in parallel with one resister per node. Again, you need to take into account the maximum ratings of the transistor before connecting a million LEDs.

The circuit on a breadboard for test

The operation is as follows. When the pushbutton is pressed, the capacitor starts to charge through R1. For now, we will not...

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My schematic is a simplification. It illustrates how a capacitor can soften the on-off transitions which are applied to one transistor. Then that one transistor controls several transistors, each of which turns its load on and off gradually.

Each load can really consist of several led strips, in parallel.

How many strips should you attach to one transistor? That will depend on how much current a transistor can conduct safely.

You must measure the current drawn by an led strip, at its rated supply voltage. It is up to you to experiment with different quantities of strips, and to make sure the transistor does not overheat as it dissipates power.

When you have gotten one transistor to safely power a given number of led strips, then you have the pattern for assembling the remaining...

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OK, so I had removed all the delays, and am using the millis() instead to implement things. One question I have, and again, I know this is something I really should be able to work out, but just can't, is......

.....most info I can find on using millis(), stopwatch, if(millis() - last time > wait Time) blah blah, to do something etc. etc. etc is all geared to calling a function, or whatever you're doing, every time the counter (that is the difference in millis between now and when you started) gets longer than the time you want it to be (an interval). i.e. something repeats every 10ms, or whatever you set the interval at.

How can I call a function only whilst the 'time now' minus the time I started, is less than a certain interval (so it repeats while the elapsed time is less than my 'interval', but without using a do or while loop).

So, for example, I start a stopwatch and do something until the time reaches 150ms or whatever time. Using the above type of...

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Hi All,

I've been excited to deck out my home with Vera2 since Ive been perusing these forums for the past couple of months. Now, Im hoping that I can pick a few of the expert brains on here to solve a problem:

-Recently I installed a GE 45606 2 Way Dimmer (works fine with 2x 50watt incandecent bulbs)
-Swapped in 2x GE LED 7 watt bulbs and now the bulbs wont fully turn off (about 15% on)
-LEDs turn off when the "saftey" plug is pulled
-Put the LED bulbs in different cans controlled by Lutron VRIO6 ZWave dimmer, they turn off fully but only pop on and off (no dimming)

My questions are:
Has anybody had this issue with the GE Dimmer
Do you think its the GE dimmer or the bulbs that causes the light to stay on
Do you think its the Leviton Dimmer?

Ive hunted the forums and I cant find duplicate issues for both dimmers (and have found instances when it works fine with all variables included) which makes me think its the bulbs......

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(Version for Common Cathode RGB LED



An RGB LED is simply three separate LEDs crammed into a single 5mm LED package. There is one each of red, green, and blue LED elements. These three LEDs share the same positive (anode) terminal, which means that this RGB LED has a "common anode" connection. To control each color, simply connect its cathode pin to ground (through a resistor), and it will light up. Be sure to use current-limiting resistors to protect the LEDs from burning out (suggestion: 220 ohms), and you can also use pulse-width modulation (see below) to change the brightness of an LED. the correct pin-out is here:

(By Matthew L Beckler, used by permission)

Here is the way our RGB LED was connected with a breadboard:

(Copy the text in the box below and Paste it into a blank Arduino IDE window)

/* YourDuinoStarter Example: RGB_LED_Fade - Red-Green-Blue LED fades between colors automatically - SEE the comments after "//"...
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I finally got some assembly code put together for the PIC12F683 to make my 2 LEDs linearly fade ON and OFF:Code: Select all; CLOCK: Internal RC 4MHz (instruction execution time: 1usec)
; NOTE: PWM used for LED fade in/out. Positive sides locked to
; HI via 150-ohm resistors, while GND side of LEDs is
; driven by a varying active-low PWM signal.
list P=12F683, ST=OFF ; Turnoff Symbol Table in List file.

errorlevel -302 ; Ignore error message when storing to Bank 1.



; ------------------------------------
; Configuration Bit Settings Explained
; ------------------------------------

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when dimmer set to 50, VCC immediately drop

00:04:37 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:04:37", "Uptime":36, "Vcc":3.032, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":90}} 00:05:37 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:05:37", "Uptime":36, "Vcc":3.032, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":90}} 00:06:37 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:06:37", "Uptime":36, "Vcc":3.032, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":90}} 00:07:37 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:07:37", "Uptime":36, "Vcc":3.032, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":88}} 00:08:42 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:08:42", "Uptime":36, "Vcc":3.049, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":88}} 00:09:43 MQTT: tele/sonoff-LED/STATE = {"Time":"2017-04-07T00:09:43", "Uptime":36, "Vcc":3.032, "POWER":"ON", "Wifi":{"AP":2, "SSID":"Ham", "RSSI":88}} 00:10:43 MQTT: tele/sonoff-LED/STATE...
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This example shows how to fade an LED on pin 9

using the analogWrite() function.

This example code is in the public domain.


int led = 9; // the pin that the LED is attached to
int brightness = 0; // how bright the LED is
int fadeAmount = 5; // how many points to fade the LED by

// the setup routine runs once when you press reset:
void setup() {
// declare pin 9 to be an output:
pinMode(led, OUTPUT);

// the loop routine runs over and over again forever:
void loop() {
// set the brightness of pin 9:
analogWrite(led, brightness);

// change the brightness for next time through the loop:
brightness = brightness + fadeAmount;

// reverse the direction of the fading at the ends of the fade:
if (brightness == 0 || brightness == 255) {
fadeAmount = -fadeAmount ;
// wait for 30 milliseconds to see the dimming...

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Being able to adjust your light source means you’re able to create the perfect atmosphere in your home, anytime. Warm and bright and dim and cozy – Philips LED can help.

Lighting is a practical and beautiful way to enhance your home. The convenient and flexible lighting of Philips dimmable LED allows you to set the scene simply and beautifully.

Our wide selection of dimmable lighting makes it easy to adjust the light intensity in your home. Even at low light levels, Philips’ light is stable and pure. Our dimmable bulbs are the ideal replacement for incandescent and halogen bulbs in terms of quality of light, compatibility and light output.

Whether you’re looking for the perfect dimmable lamp or you want to replace your current bulbs, we have whatever you need to make your home both comfortable and bright. From ambient to task lighting, Philips has got you covered when it comes to...

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I had this happen with my 4S after it fell in the bathtub and got wet. I retrieved it within less than 3 seconds, wrapped it in a towel and dried it off. In a panic I attempted to blow out any errant moisture with a hairdryer (no, no…). I also repeatedly powered the phone off and on (another no, no). The phone had remained on throughout the soaking and initial drying process. The only thing I noticed was some moisture under the glass in front of the rear camera lens. I kept a warm dryer on it until the moisture evaporated.

At some point I turned on the camera to test it and the LED remained lit. Even after powering the unit down, it remained lit. At first it was fully lit, and then over time it began to fade and remained lit dimly. Testing the flash feature, I could still get it to flash and using a Flashlight App I could also get it to strobe, but never turn off completely. All other features of the phone functioned fine. For what it's worth, upon inspection, only the...

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Philips Hue lights are far more than just mere lightbulbs that you can control from your smartphone. They can gain so much functionality from third-party apps. Once such feature is the ability to automatically turn on when you wake up (or turn off when you go to sleep.)

This feature only half works with the official Philips Hue app because you can set a time to trigger certain lights to turn on, off or dim. But it works even better when paired with your actual alarm clock app or Fitbit so the lights go on precisely when you wake up. They can even gradually fade on if you wish.

Using Sleep Cycle

If you use your iPhone or Android phone as your alarm clock on the morning, the Sleep Cycle app can link to your Philips Hue lights. Aside from being an all-around good alarm clock that tracks your sleep patterns and wakes you up at an optimal time, a premium feature can automatically turn on your Philips Hue lights as you’re waking up. Even better, it can slowly turn...

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LED Christmas Lights and How to Fix Them

and How to Fix Them

Terry Ritter

2007 May 24


Christmas lights are the strings of little electric light bulbs often used on Christmas trees or to decorate homes or yards. A wide range of strings are available, but this article is about the new "LED" bulb strings. "LED" stands for Light-Emitting Diode, and the colors they produce are both stronger and purer than dye coated incandescent lamps. The Philips LED strings I discuss here cost about 10 times as much per bulb as the cheap incandescent strings, but:

they have no filament to break and should last longer; their colors do not fade; they use about 1/10 the power for the same amount of light; they run cold: they cannot burn fingers.

Many people find the intensity and purity of the colors in LED strings simply more enjoyable than incandescent lights. LED strings are not just a more costly modern version of the same...

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If you have any experience of stage lighting you have probably used the DMX512 protocol to control your lighting rig. Apart from being able to control your dimmers, DMX lighting control is at the heart of intelligent lighting, moving lights and accessories. This article explains the basics of a full DMX stage lighting system while busting some of the myths surrounding DMX lighting control.

DMX Stage Lighting Course

On Stage Lighting runs a short course on the basics of DMX Stage Lighting Systems online. If you would like to access this, just fill in your email in the box below to join the Learn Stage Lighting Guest List (MailChimp) and I’ll let you know as soon as it is next open.

An Overview of DMX.

Image by VeldaZ

Digital Multiplex (DMX) was developed as a standard digital theatre lighting control which replaced the older analogue systems that were used to control the dimmers in a stage lighting rig. Despite the advance in use of...

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Tuners are listed alphabetically by manufacturer and in alphabetical and numerical sequence by model number. In parentheses after the model number are the year of introduction and most recent list price, and/or the original list price if indicated by "orig" (special thanks to David Rich of The Audio Critic for copies of historical material from his reference library). Please see the On-Deck Circle for tuners that we know very little about or that we're not sure merit a writeup. We have posted updated eBay sale price data in this section through August, 2011; data for "as is" or damaged tuners, or otherwise unrepresentative auctions, may be excluded.

Onix BWD-1 (front, with power supply, back) search eBay
A longtime...

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