The led-strip tag has no wiki summary.
7
votes
3answers
169 views
Power MOSFET overheating at 1A
I am building an arduino controlled RGB LED driver by using WS2803 constant current LED driver, TLP250 MOSFET drivers and IRF540N MOSFETs. This is how it looks like:
The picture got scaled down so ...
5
votes
2answers
222 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 ...
0
votes
1answer
52 views
Need help re power use for an arduino
I'm trying to build a rechargeable LED prop using neopixel sticks.
(http://www.adafruit.com/products/1426)
There will be a lot of them, potentially up to 15 sticks (128 leds) if such a thing is ...
0
votes
0answers
87 views
Prevent interference caused by fan
I have several strips of addressable (LPD8806) LEDs hooked up to an Arduino.
simulate this circuit – Schematic created using CircuitLab
I have noticed that whenever I turn off a fan ...
2
votes
1answer
162 views
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 ...
3
votes
1answer
124 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 ...
5
votes
2answers
184 views
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 ...
0
votes
1answer
178 views
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 ...
1
vote
2answers
477 views
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 ...
1
vote
2answers
394 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 ...
3
votes
1answer
303 views
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 ...
1
vote
2answers
260 views
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 ...
1
vote
0answers
1k views
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 ...
0
votes
1answer
223 views
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 ...
0
votes
0answers
630 views
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 ...
-1
votes
1answer
73 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 ...
2
votes
2answers
227 views
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 ...
6
votes
2answers
320 views
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 ...
-1
votes
1answer
290 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 ...
0
votes
1answer
119 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 ...
7
votes
2answers
316 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 ...
2
votes
1answer
349 views
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 ...
3
votes
2answers
2k views
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, ...
2
votes
2answers
705 views
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 ...
2
votes
3answers
249 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 ...
