Questions tagged [led-strip]

LED Strips come in two designs, both on Flex Printed Circuits (FPC). 1. Simple LED + Resistor versions, typically with multiple parallel segments of three LEDs with matching resistors. 2. Digitally controllable with embedded controllers. Data is wired in series while power is paralleled by segments or pixels. Both have different and similar application challenges.

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How to wire in my TIP120

I'm trying to have a LED strip light up when I play my guitar. I'm told I can use a Darlington transistor to switch on and off the LEDs. It would switch using the current from the output of my amp to ...
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1answer
5k views

Read and decode .led file

I'm working on a flexible LED screen persisting of 20 meters of digital RGB LED strip with WS2811 IC for each LED. I want to control this using Arduino, which isn't a problem using FastSPI. My ...
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Powering 17 meters of RGB LED strip - Worried about voltage drop and wire size

I'm modifying an IKEA Ramvik coffee table by mounting lengths of individually addressable RGB LED strip under the glass controlled by a Raspberry Pi. The LED strip is pretty standard; running at 5v ...
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Using a N-Mosfet to switch a common cathode ledstrip

I am trying to drive a RGB-ledstrip using the following circuit: http://learn.adafruit.com/rgb-led-strips/usage As I am using a Common Cathode led-strip instead of a Common Anode one as used in the ...
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How to plug 2 5m RGB LED light strips together?

I got two 5 meters RGB LED light strips and would like to connect them together, controlling them as a single strip. Each strip power is 72 W, the input voltage is 12V, it has 300 5050 SMD LED ...
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4k views

Building power/control interface for RGB LED strips

I am attempting to build/create/design/whatever a way to control my RGB LED strips via a USB or ethernet interface. These strips consume a lot of power and the mass produced controllers suck. I would ...
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1answer
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Make an LED Ring Light Up Smoothly?

I am working on a project that would look really cool if I was able to put a ring of LEDs (kind of like the one on the TRON Identity Discs) light up smoothly in a circle, rather than have sections of ...
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2answers
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How can I power the blue LEDs separetely on this aquarium light?

I have a Beamswork LED aquarium light like this. It has a 3 way switch: All LEDs off Blue LEDs on only White AND blue LEDs on It has a single mains power plug. What I want to do is make it have two ...
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Arduino IR Transmitter & Receiver w/ LEDs Flickering Issue (What's wrong with this circuit?)

I have an Arduino Uno connected to two IR transmitters and respective receivers. Basically, when one of the receivers detects a beam break, I have a strand of LEDs display a pattern. This all works in ...
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How do I use this LED strip?

I got this LED strip that I'm trying to control with my arduino. I searched for similar strips online but couldn't find any. I only has leads for DIN (blue), GND (black, splits in 2), and +5V (red). I ...
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Nice three pronged plug for WS2811 LED strips?

I'm building a suit with under 1000 RGB LEDs on addressable WS2811 strips controlled by an Arduino---specifically I'm using at most 16m of these WS2811 strips. Oh, the project is inspired by Jungle ...
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655 views

Strip LEDS current consumption is 6A or18A for RGB strip leds?

I want to buy 5050 strip led 10m long. In the spec they always write the current consumption is 1.2A/meter (which is 0.24w per led), so for 5m I have 6A. But, all LED dimmers and controllers they sell ...
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Sync 12 Arduinos - I2C vs Serial

I've been given 12 arduinos (Mega) and 12 breakout boards (custom built. they pump up the output of the digital pins to 12v @120mA) to control around 300 LEDs. I'm using a pseudo PWM library to fade ...
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How should I select the resistors for this constant-current application for a 317?

Over at OnSemi, they have a little doc about using a 317 voltage-reg as a current source: http://www.onsemi.com/pub_link/Collateral/AND8109-D.PDF Their final example, providing constant current to an ...
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927 views

In-line Sound Level Meter Circuit (with LED bar).

I am looking to create an in-line sound level meter (indicator). This would connect between the headphone audio out (from a computer) and a pair of headphones. I do not need to get a precise ...
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631 views

Switching Regulator (LED Driver) “Flickers”

I have a constant current LED Driver (LM3410) that effectively functions as a switching voltage regulator to provide enough voltage for LEDs in series. When I power it with a relatively low voltage it ...
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617 views

How to buffer an ATMEGA for millisecond-level power interruption without strange behavior?

I have an ATMEGA328p-pu arduino with an LED + shift-register strip circuit attached over SPI. When it turns on, it increases a variable in EEPROM to advance the display mode. We have the brownout ...
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Large difference between specced values and real values for LED strips?

Recently I bought some "300LED/5meter Waterproof 5630 SMD LED Flexable Strip" i.e. High brightness LED strips from China. In the specifications, it was said that the strip consumes 75W @ 12v, which ...
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Circuit diagrams for LED Chaser Christmas Lights

I'm looking for circuit diagramS for ~50 LED strip with lights running* repeatedly from the bottom to the top of the Christmas tree. I found simple solutions with only 13-15 LEDs, but this is, ...
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3answers
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RGB LED Strip - Variable Voltage Vs. PWM

I am going to install an Analog RGB (non adressable) LED strip in my room and need to make a driver for it. The LED strip specs are: 10 cm segment 12V @ 60mA max per segment I would be using 330cm ...
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3answers
762 views

Is the theory of operation behind my FPGA design acceptable?

(This question is somewhat related to a previous question of mine.) I'm trying to use an FPGA to drive an LED strip which contains several WS2801 ICs. (WS2801 datasheet) The operating premise of the ...

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