Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

-1
votes
0answers
35 views

Turn on led-strip parts using arduino [on hold]

I am software developer and I am starting my electronics adventure, so I have a very basic knowledge. As a first project I am thinking about arduino and led-strip. I would like to split led-strip to ...
0
votes
0answers
42 views

Adequate Power Supply for 300 Daisy-Chained LEDs [on hold]

I have 300 LEDs (ws2812b) wired in a series. They were sold as 150 LED/5 meters and rated to power at 9W/m, so 45W/5m strip. I would need 90 Watts to power my entire 300 LED strip. I have a 3-rail ...
1
vote
0answers
22 views

LED strip power supply 12V 2A vs. 12V 25A [duplicate]

I am using a white light LED strip in my 3D printer enclosure. And I would like to use the power supply of my 3D printer to power this LED strip. The original power supply of the LED strip is 12V/2A ...
0
votes
3answers
138 views

Will this schematic work - basic LEDs + strips

This is my first LED project for my art bike and after a good chunk of reading, I wanted to know if the circuit would run properly. LED are green 5mm from AliExpress. Forward voltage 3V-3.2V, 20mA ...
-3
votes
0answers
38 views

ws2811 driving RGB LEDs [duplicate]

Iam going to drive 9 RGB leds with WS2811 LED Driver and NPN transistor as a switch, Can you please check my schematic for mistakes or advice?
1
vote
0answers
45 views

TV Backlight LED's voltages

I have a power supply that is outputting ~300v and 350ma. the LED's in the backlighting are on 11 strips and there are 6 per strip. Can I calculate the voltage per led by dividing 66 LED's into 300v? ...
1
vote
2answers
77 views

Why are flickering LED driver circuits cheaper than flicker-free circuits?

Many low cost LED fixtures have a 2X line frequency flicker. Since flicker free switching LED power supplies are not difficult to design, I assume that flickering drivers are cheaper than flicker ...
0
votes
1answer
43 views

Safe to drive 24V leds directly via 2SK2049 MOS-FET?

I have built a simple automatic switch that synchronizes IKEA LED strip with the main light in the room, eliminating the need to switch multiple switches in the evening. Currently it works like this: ...
3
votes
0answers
37 views

How to wire an entire room / kitchen with LED light strips? [closed]

As the question suggests, I'm looking into adding LED light strips throughout the kitchen (over cabinet, under cabinet, and kick -- I think under the countertop would be neat, but harder to hide). ...
0
votes
2answers
147 views

Can i use I2C level shifters to power digital LED strips

Can I use I²C level shifters to power digital LED strips, more specifically, WS2812B strips? I can only find I²C level shifters, are they ok?
0
votes
1answer
113 views

What connector is this on an LED strip light?

I managed to find some scrap LED strips. I noticed that these have some peculiar connectors on them. Does anyone recognise what connectors these are?
1
vote
3answers
69 views

Maximum safe amperage for LED Strips

A lot of online resources never question the use of high amperage power supplies for powering LED Strips. As an example, 5 meters of low density (30 LEDs per m) WS2812B strips already use ...
0
votes
0answers
38 views

Controlling LED strip with Wemos D1 mini

I have a 12v led strip and have tested the current draw at ~500mA per colour. I want to drive this via my Wemos GPIOs which are 3.3V @ 12mA max. For testing I have been using 2N2222 transistors with ...
2
votes
0answers
30 views

NeoPixel THT: Varying pinouts [closed]

I am in the process of designing a PCB for a solder kit that receives NeoPixel type LEDs, the ones with the short head: Now, there seem to be different pinouts: Ordered on Amazon.de as WS2811 LED ...
0
votes
0answers
31 views

Relay for high current DC power (Led strip)

i'm going to make a relay circuit for led strip which have 650 watt 12VDC, so it's about 60A. i've search some forum said to use BJT or MOSFET, so i've search the component on my country and found ...
1
vote
1answer
134 views

5V vs 12V addressable LED efficiency

Despite hours of googling, I could not come to clear understanding how efficiency of 5V addressable LEDs compare to their 12V counterparts. If 5V is supplied to WS2812, and the red LED only needs 2....
0
votes
0answers
36 views

Bypassing 110v power-supply on LED light-strip?

I am wanting to use 2 16.4ft rolls of multicolor LED strips in my enclosed trailer for lighting. They come with 110v power supply that plugs into another coverter that the LED lights plug into. Is ...
1
vote
2answers
73 views

Powering multiple WS2812B strips from different sources, are all grounds connected?

I'm looking to confirm if I need to connect the ground of 2 LED strips which have different power sources. Adafruit says The key is to have all of the ground pins among the strips connected in ...
0
votes
2answers
62 views

Brightness when using 3.7v battery for powering 6 LEDs rated at 5v in a series

I am using 6 LEDs in a series (APA102C spec) these specifically powered by some atmega chip, and am having trouble finding a sufficiently small battery that will allow me to run the LEDs at maximum ...
1
vote
1answer
85 views

Mosfet: gate voltage 0 but still led strip on

LED strip: DC, 4W Mosfet: IRF740 (datasheet) To Do: Use wall socket (AC) to run DC led strip and also turn it on/off with MOSFET and arduino. AC to DC is done with rectifier and transformer. So ...
0
votes
1answer
23 views

Implementing led lighting with SR-ZG9101FA-RGBW

So I have this device: SR-ZG9101FA-RGBW I'm trying to properly connect it, but so far I'm having issues such as being unable to detect device in philips hue app and only two color channels are being ...
1
vote
0answers
81 views

WS2811 LED Strip Driver

I'm in the process of designing a LED strip driver using a WS2811 chip and 3 MOSFETs. I've attached the schematic below. I based it on the reference circuit in the WS2811 datasheet (link), and this ...
1
vote
1answer
46 views

LED-strip PWM works with Raspberry Pi, doesn't work with Attiny45

I'm trying to control an RGBW analog LED-strip by PWM modulation. When using an Attiny45 the LED-strip just blinks at a low frequency (approx. 2-3 hz). However, using a Raspberry Pi 3 to control PWM ...
2
votes
1answer
54 views

WS2812B LED Strip Not Drawing Full Amperage

I recently purchased one of these LED strips. Now I have read all about how these are notoriously known for drawing a lot of current from its power supply so I bought one of these power converters ...
1
vote
2answers
70 views

How to find a particular LED strip? [closed]

This feels like a silly question, but I don't know the answer. How do I find an appropriate LED strip? I am looking for a flexible strip of LEDs that can be driven with apprx 65 VDC at 350mA and is ...
2
votes
2answers
43 views

Modify LED strip from 4 AAA battery power to 12V DC

I wanted to put some light to my 3D printer. The power supply outputs 12V DC and I have this old car workshop LED torch that had it's batteries leaked. I disassembled it and cleaned the salt from the ...
1
vote
1answer
95 views

RaspberryPi driven LED strip is flickering

Supplies: LED Strip Please note I'm trying to power 28 of them. ~1400 mA Power Supply for LEDs 5v/2A Raspberry Pi Breadboard Microcontroller I am following the adafruit for driving LEDs from the pi. ...
0
votes
1answer
64 views

Using 1 IR receiver for 4 LED controllers

I've purchased 4 cheap LED controllers from China for controlling 20m LED stripes. After setting the system up, I encountered the problem that at least 1 of the 4 LED controllers doesn't respond to ...
-1
votes
1answer
47 views

ATtiny45 program/reset issue

I'm pulling my hair out trying to get this ATtiny45 to work, hopefully someone out there can help. The ultimate goal is to drive an RGB LED strip using PWM, but I'm getting some unreliable behavior ...
0
votes
2answers
85 views

Can a 3W pot be connected to a 5W LED baton? [closed]

Situation: I got a LED baton and the brightness was higher than required. I added a regular 22k pot in series to it, and achieved lower brightness, but within a few seconds, the pot was burnt. I ...
1
vote
0answers
157 views

WS2812b LEDs intermittently do not respond to data signal

I have wired up permanent holiday LEDs on the front of my home, using a 5V 60A power supply and several strips of WS2812b's (generic Neopixels), controlled by a Wemos D1 mini. The Wemos is powered ...
0
votes
1answer
42 views

LED strip lights not working properly on DC power

I have a set of LED strip lights that I am attempting to control with an Arduino. When I power the first few LEDs from my Arduino 5V out pin (or 3.3V out pin for that matter) it works exactly as I ...
1
vote
0answers
29 views

Can I connect 2 power supplies for 16 meters LED RGB strip?

I've bought 2 sets of 10 meter LED RGB strip (7.2w/m) for a room. Then I've cut them to around 8 meters each to get 16 meters. Everything seemed fine but one thing, because it's 2 separate controllers,...
1
vote
1answer
115 views

What does “Run Power and Ground wires back to the Arduino” mean?

An Adafruit article showing people how to wire up an RGB LED to an Arduino UNO has the warning shown below on its page. For longer strips requiring more than 1 Amp, wire the power directly to the ...
4
votes
2answers
105 views

Open-loop Buck LED dimming

About this buck LED driver... TL/DR the questions: 1) I intend to drive the FET from a microcontroller PWM via a suitable FET driver. This open loop control scheme seems too simple. Is it a trap? I ...
1
vote
1answer
77 views

5v 10amp powering arduino and LED strip

I need my 5v 10 amp power supply to power both my LED strip and arduino. I will have the LED strip directly wired to the power supply, then for the arduino I have two ideas - either cut a USB cable ...
2
votes
2answers
240 views

What gauge wire for 24V, 72W, 8m extension RGBW?

I have a simple question (I think) but I haven't been able to find the answer. I have 4 * 5m lengths of RGBW LED lighting, which is rated at 24V, 14.4W/m. This is the maximum power draw, assuming the ...
4
votes
2answers
2k views

DIY LED lamp is less powerful than expected

I am making an LED lamp using an LED strip. The LED strip I am using is a 240 LED/m SMD2835 strip, which operates at DC12V, and is supposed to use 18W of power per meter. My lamp is constructed as ...
0
votes
2answers
140 views

DotStar Micro LED Strip individual capacitor need and PCB questions

I was designing a PCB to make a DotStar Micro LED (APA102–2020 datasheet) strip and I saw that none of the products sold in the Adafruit store that uses these same LED's have capacitors in each led as ...
0
votes
1answer
34 views

Led strips power supply , consumation and contorller

Hello everyone i am really bad at this stuff, i tried reading a few articles but i can't seems to understand anything. So basically i bought the LED strips from aliexpress that came without power ...
3
votes
2answers
189 views

Noise and flickering first LED (APA 102)

I'm designing a circuit board to distribute power and data to 8 APA102 strips using a Teensy 3.2. While the first version of my board mostly works, I'm having some issues I'd like to solve for a ...
1
vote
1answer
51 views

Is Adafruit's recommendation for led strip driver MOSFET incorrect?

Adafruit's article ( https://learn.adafruit.com/rgb-led-strips/usage ) states that transistor IRLB8721 can be used with 3.3V or 5V gate voltage to drive LED strip. However, in IRLB8721 datasheet ( ...
1
vote
1answer
81 views

LED Controller + LED Panel with common cathode

I have a 3-CH DMX controller (5-24V, 5A/ch, common anode) from amazon (don't know if links are desired here) and a 12V 100W MCPCB LED panel, which unfortunately has a common cathode. The panel is ...
0
votes
2answers
27 views

LED dimmer/controller: preserve state after loss of power? [closed]

Summary: Are there LED Dimmers that are "always on" and whose settings survive loss of power? Details: I am considering a more or less standard led-strip set (consisting of power transformer/driver,...
1
vote
1answer
63 views

How to wire DotStar LED strip with 6 wires at the start of the strip

I bought some of these LEDs: They have six wires at the start of the LED strip. I thought that perhaps the separate red and black wires were to power the LEDs, and that, for the 4 wire JST, the black ...
0
votes
2answers
125 views

antiparallel led circuit

Is it possible to glow the both LEDs simultaneously in an anti-parllel circuit? I tried with H-Bridge but I am not able to do it simultaneously. Please help me to solve this problem
1
vote
1answer
73 views

Power supply question in regards to powering 400 LEDs

I have WS2812B LED strips, that has 144 LEDs per meter. The ratings are: 43W/M .3W/LED .06A per LED Input Voltage of 5V DC The recommended power supply stated by the website is 5V DC and 10A for 1 ...
1
vote
0answers
45 views

Isolated vs non-isolated boost converter for LED (12v to 24v)

I have a 12v system in my motorhome and planning on installing 24v LED strips, however, I'm unsure whether I would need an isolated or a non-isolated boost converter. I'll be using roughly 5 meters ...
0
votes
1answer
45 views

Choosing correct relay for LED power supply rating

I have a 500W 24V power supply for running 24V LED strips. The power supply says it's rated for ~21 amps (500W / 24V). Assume input is US 120V household power. I want to control the 120V supply ...
3
votes
1answer
135 views

Powering 9216 leds @5V, @24V with converters

I am struggling with a power supply question. I would like to power up and control 9216 LEDs -- strips of 144 LEDs/meter (WWA SK6812 - just like the RGB kind). These are powered at 5V and draw 43.2 ...