Questions tagged [dimming]

'dimming' is the action of reducing the amount of light emitted from a device.

Filter by
Sorted by
Tagged with
10
votes
2answers
3k views

LED accent light that slowly dims when removed from power source

We've all played with different transformers and power supplies that have an LED indicator that dims before going out entirely when the power supply is unplugged. I'm working on designing an accent ...
2
votes
1answer
4k views

pwm frequency for led dimming

i am using a meanwell LDD-H driver to drive some led for a reef light. (datasheet http://www.kosmodrom.com.ua/pdf/LDD-H.pdf) standing to datasheet i can use a pwm of 100 ~ 1KHz what's the difference?...
1
vote
3answers
5k views

Dimmable AC LED controlled by Arduino

I am a beginner, and I have a school project that requires me to use Arduino or any other microcontroller to control an LED light. After some research, I found out that not all LEDs support dimming, ...
1
vote
1answer
1k views

Altium: How can I dim the layers I'm not currently using?

The routes on all layers are fully bright. I want to dim the ones on the layers not currently used. I don't mean dimming ALL routes (even on the layer I'm currently on) except the one segment I'm ...
11
votes
4answers
36k views

Digital Dimmer With Microcontroller

I want to build a digital dimmer for resistive Loads. I have found this circuit for that: The input voltage is 220VAC 50Hz. The red box in the picture is for ...
9
votes
6answers
16k views

Arduino Home Light Dimming

The drywall is just starting to go up in my family’s basement project. I’ve been looking into residential light control systems. Some of the ones I’ve seen have been an upwards of $2,000. I’m thinking ...
6
votes
2answers
3k views

Design considerations for LED strip PWM dimming

A note on my background: I'm a programmer in an electronic design company, starting out with hobby projects. I'm planning to design a PWM LED strip dimmer and colour controller for an RGB/RGBW led ...
3
votes
3answers
13k views

Trouble with triac driven dimmer circuit

I have a dimmer circuit that produces the following wave forms. Red: Triac Gate Signal Yellow: 120v 60Hz AC Wave (not triac output) I would assume that given this signal, the triac should flip on ...
3
votes
5answers
6k views

LED matrix dimming: How to control the current in a 12V LED lamp for video lighting?

I'm trying to dim a 12V LED lamp (LEDs specification here however schematics have the real values...) I've build for a video lighting application. My initial thought was to use a potentiometer but it ...
1
vote
2answers
824 views

LED glowing when the driver's ground is cut off

I made a simple circuit with a premade LED driver (Recom RCD-24-0.35), analog-dimmed by a MCP4921 DAC, which is controlled by a 3.3V microcontroller board. You can see the schematic below, Q1 is ...
1
vote
3answers
2k views

Switching / dimming a high power mains heater

I need to make an adjustable power controller for a 3kW heater that will run off single-phase 240V AC power. How should it be done? Maybe a triac circuit similar to that used for dimming lights. ...
1
vote
3answers
8k views

Permanently dimming an incandescent light bulb

I have purchased a nice light bulb with long visible wires/resistors and plugged it in, on the ceiling. It burns too bright without a dimmer and does not look as intended (also the lifespan decreases)....
0
votes
1answer
332 views

dimming leds and switches

Is there a way to dim LEDs? The idea is to run them in my car and have a dimming switch somewhere but I cannot find a suitable dimming switch and was hoping some one could recommend other methods of ...