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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What purpose does a capacitor before each SK6812RGBW serve?

On a SK6812RGBW strip, such as this one sold by Adafruit, each segment has both an LED and a capacitor (of some unknown value). What purpose does this capacitor serve? In this question, it was ...
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26 Led Array Component Identification and Failure Cause

I have the following LED lights. These lights keep failing on me. I'm suspecting that the DPAK(U1) component is failing but I have no clue what it is. The markings on the DPAK reads 5ZYl8GF6D. I'm ...
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60 views

5 m, 5 V LED strip 20 A PS = Fire?

I've got a 5m LED RGB strip to go up the stairs and will be programming it with arduino. eBay link. They state 60 LEDs/m @ 18 watt/meter, thats 3.3 W per LED? It says current rating of 3 A, so that ...
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43 views

How are long runs of LED strip controlled from a single switch/tuner?

I am trying to configure an LED light strip installation, but it seems that a lot of the existing equipment solutions are not designed for high power lighting systems. For example, one supplier quoted ...
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46 views

MCU powered from the same PSU as a LED strip

I want to make a simple controller of WS2812B addressable LED strip. I will consist of a MCU (most likely Atmega328P), a couple of buttons (RESET and mode selection) and 7-segment indicator, which ...
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26 views

Fix blinking LEDs with a motion sensor (when off) [migrated]

I have bought a new motion sensor for my corridor LEDs. The lights turn on fine with it, however, when the sensor is set to OFF, the lights blink indefinitely (a few times per second) and never ...
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50 views

How to properly wire a 4.5V LED strip with 12V motors

I'm modding a Nerf gun (Rapidstrike to be exact), and I put a 3S Lipo in there with 1000 mAh. The circuit right now is a rev switch, trigger switch, switch behind the pusher, battery, pusher motors, ...
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57 views

How to immediately turn WS2812 LED strip on after power on?

I built a table lamp with a 1m WS2812 LED strip controlled by a RPI Zero W. It has a decent power supply that outputs 5V directly to the LED strip and also powers the RPI. The RPI takes approximately ...
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42 views

LED ceiling light with mismatch driver [closed]

I am new to the forum, so please forgive me if I am asking a stupid question or posting the wrong thing at the wrong place. I recently bought a Led ceiling light online that comes with a remote ...
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66 views

Raspberry Pi with 74HC14 connecting to LED strip (WS2812B)

This might be a stupid question, but I can't seem to figure out how to convert 3.3V to 5V with the 74HC14. I have a power source which can supply 5V (see the power adapter at the left), and use it to ...
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86 views

What is dynamic memory?

I have an Arduino Uno and I'm trying to use it to provide data for 1200 WS2812B leds. When I tried to provide data for them, the Arduino IDE says "Sketch uses 5086 bytes (15%) of program storage space....
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Wemos D1 Mini + WS2812B Idle Power Usage

I recently started tinkering with these DIY IOT stuff. My first project was a small switchable LED strip. My question: What is a "normal" idle power usage of such a setup? I'm measuring ~1.2W with ...
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51 views

Does a capacitor regulate voltage when power is off?

I'm playing with a strip of APA102 LEDs. When VCC is disconnected, but GND, Data, and Clock are left connected, some of the LEDs faintly blink red, which I'm guessing is due to residual power from ...
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58 views

What's the simplest (smallest) way to dim a DC LED strip with a switch?

I apologize for asking about what is probably the most simple problem to you folks but it seems I am ignorant of all the basics of electronics and Google did not help me here. This is a 12v DC ...
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Is DC 5V and 2A dangerous to me? [duplicate]

I am new to electronics so please forgive me. I am looking at powering a WS2812B RGB strip. Specifically 144 LEDs/ meter. After doing some research I found that 200mA is lethal and can kill. Now, of ...
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54 views

Use parallel or series circuit for high power LED strip lights? [closed]

I have a complex strip light installation and am working on the wiring plan. 5 watts per foot x 200 feet = 1000 watts at 24 volts DC which would be about 40 amps. I have read web sites which give ...
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93 views

Driving 34 White LEDs in Series with Linear CC Source with 110V Mains

I have 102 White LEDs in total and I want to drive them from the 110V rectified Mains in 34S 3P configuration. Here's the graph about the LEDs (Red Line). I want to pass only about 50mA ...
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47 views

Building a 50' string of LED lights for patio

I cannot understand the Ohm's law thing. I'll make this simple and pray for an answer. I have an adjustable "buck converter". It can take 4-38 VDC into it and step it down to 1.25-36 VDC out. So, ...
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48 views

How to connect USB led strip via battery

I got a USB led strip from Ebay. Unfortunately there is no indication what type of led it is. Looking at power converter it says "5V Output 3x2A" One strip has 15 leds. I want to connect it via ...
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1answer
30 views

Turn on LED strip via PIR using NPN transistor

I have following circuit. Really simple. But I keep missing why I cant power LED strip (5V 1A). Falstad simulator says overflowing current. I am not very good at simple hardware thing. I often solving ...
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1answer
73 views

How to drop 28VDC for Voltage regulation between 14VDC and 16VDC

I want to convert 28VDC to run a LED map light that turns on at 14VDC and reaches its safe brightness at 16V (30mA). I used a 1k ohm potentiometer and a 1kohm resistor and dropped the voltage to where ...
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Feeding two LED strips from two power supplies and one controller

I have two 7 meter RGB (4 wire) LED strips setup in coving in one room. Currently they are totally two separate setups. I would like to combine them so that they both use one wifi controller. Here ...
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5answers
167 views

Why is 12V the standard for LED strips?

I am wondering why 12V is the standard voltage for LED strips (RGB/W) when each SMD LED whether it be 3535 or 5050 is usually rated for ~3V. A lot of energy is wasted as heat through the SMD ...
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66 views

Use one 12V 30A timer for two separate 12V inputs? [closed]

I'd like to use the following timer, rated 12V 30A, but for switching two different 12V inputs at the same time and not having to buy and program two timers. But the timer only have one channel. One ...
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2answers
42 views

Can I keep half of an addressable led strip on?

If I bought some WS2811B led strips (300). if I ran them across a room is it possible to make the first 150 LEDs or so stay on, and the last 150 off?
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115 views

Why these tutorials don't care about wires when using 10A with 5V to light up strip LEDS?

One popular project I want to do with my Arduino is to light up 150 LED Strip of 5 meters (WS2812B). Here is my project: So, I have a power supply of 5V 10A (ALITOVE 5V 10A AC to DC Power Supply). ...
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35 views

Connecting PWM-Dimmers to drive LED-Strip

I've got a question about how to connect multiple PWM-Dimmer to drive a RGB-LED Strip. I bought three of these Ebay-Article No. 272304972812 and connected them as shown below. Without any schematic ...
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2answers
90 views

Does a correctly sized resistor protect low voltage components from a high voltage source?

Let's say that I have a 37v DC source that I would like to reduce to 12v so it can run a 12v light bar (a string of 6 leds and I assume a resistor to limit the current). I measure the resistance of ...
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2answers
138 views

Why don't people power LED strips in parallel instead of using amplifiers?

The common pattern to run long LED strips seems to use separate transformers and amplifiers in between the individual strips. Why not use a single transformer, controller and appropriately thick ...
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1answer
76 views

What rating of constant current LED driver do I need? [closed]

I've recently finished building some understairs cupboards. I fitted a 9W LED light into the cupboard which comes on when the cupboard opens. It is driven from this LED driver. I've measured the DC ...
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3answers
86 views

WS2812 high inrush current in big installation

I have a "big" installation with WS2813 (WS2812b successor) LEDs. The installation encompasses over 350 LEDs which should consume about 21A if all powered on, which should never happen (it's a simply ...
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1answer
65 views

LED REACT TO MUSIC [closed]

I want to ask if anyone can tell me what transistor and resistor I need to use for 5v led RGB lights ( i need them in green or blue only). Here is a link to the video I'm taking info from: https://m....
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2answers
108 views

Powering Raspberry Pi Zero W and LED-Strip with 24v DC

I have a RGB LED-Strip from IKEA that is powered with a 24v DC adapter. My Plan is to Power a Raspberry Pi Zero W and the LED-Strip at the same time from the same power source. My circuit looks like ...
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1answer
83 views

LED strip keeps blowing transistor

I made two LED controllers using an ESP. On the PCB I'm using three 2N2222 transistors + resistor (1k Ohm) at the base to control the 12V circuit powering the LED strips by applying 3.3V from the ESP. ...
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1answer
98 views

Will WS2812B overheat because of epoxy?

So I'm currently working on a standing LED lamp with WS2812B LEDs. The length will be about 1.2m with 60 LED/m. I'm planning to cover the LEDs with white epoxy to diffuse the light and have a nice ...
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42 views

Wiring Minger LED strip to 12V interstate battery

I have been having problems connect this LED strip to my boat https://www.amazon.com/dp/B07HRHDV1T/ref=cm_sw_r_cp_apa_i_MBBrDb9K59ECA I am going to wire the LED to a breaker which control a switch ...
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47 views

Creating mobile LED projects with LED strips, USB, and an 8xAA battery pack

I'm trying to make some LED clothing. I'm planning on buying some LED strips, which require a 12V power supply. I plan on buying some battery packs for the power source. To link the power source to ...
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1answer
71 views

P30N06 Mosfet Not Working Correctly

I have an N Channel Mosfets I'm trying to use as a switch for a motion sensor and an LED strip light (12V <0.8A). It seems like no matter how I hook up the mosfet it is always set to 12V or stuck ...
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370 views

Multiple Power Supplies Powering Long LED Strip - Proper Way to Ground

Please refer to the above diagram. The 2 power supplies are each placed in the opposite end of the led strip. I will be connecting the signal ground and the power ground just before it connects to ...
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0answers
182 views

Please check my board design before I waste money

TL;DR: Please make sure my schematic and board design won't blow up on me. GitHub Repo if you're feeling extra thorough. Project overview I am trying to create an Arduino based Bluetooth RGB led ...
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2answers
705 views

Edge-lit LED panel best materials? [closed]

I'm trying to replicate the effect of this LED panel I found at Home Depot with a different set of LEDs and use a differently sized panel. It's basically just a diffused light that mimics a window or ...
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2answers
73 views

24V supply run 12V 3014 LED strip in series; help with resistors for series

i need help with wiring up some pieces of a 12V LED strip in series to run on a 24V 150mA supply. i want to add resistors , to help keep the strings evenly balanced. i don’t know if it is necessary, ...
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1answer
36 views

CC driver led project

I have a lot of (new) LED light strips from a job I was on. These light strips were in 2x4 fixtures. As a project I would like to use these as undercabinet lights. But the CC driver that comes with ...
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91 views

MOSFET not giving out full 12V

I'm using three IRLB8721 MOSFETs to power my LED strip. Through an ESP-12F I'm delivering 3.3V to each gate, which should bring me a 12V output, I think. But this doesn't work, I only get 5.8V - 7.6V (...
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1answer
62 views

Proper Way to PWM (Voltage Control) Dim LED Strip

I have been asked to create a dimming system (Along with other features) that interfaces to the cheap LED strip lights. A lot of people seem to use standard N-FETs with PWM on the low side. My concern ...
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1answer
70 views

LED Strips - Data Noise Over Long Distance Between Controller and First Strip

Please refer to the above picture. The black line is the ground wire and the green line is the wire carrying data. First Question In regards to data noise/interference, can the output ground wire ...
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1answer
88 views

Problem with LED strips

I am using a 30V 50A power supply (KXN-3050D) as an external power source. I have an led strip with 120 LEDs. The problem is that when I drive 50 LEDs (in full brightness and white,) the power ...
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0answers
51 views

How to work around odd LED strip current limiting?

I’m a theatre lighting technician (and electronics hobbyist), working on a project involving SK6812 RGBW addressable LED strips & strings. They use an 800kHz single-wire control signal, ...
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1answer
134 views

LED Strip - Voltage Drop when Wired in Parallel

please have a look at this chart: I have a question on the calculation of voltage drop on each of the connection point between the wire and led strip. We are using 1.5mm2 wire and 24V led strip which ...
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3answers
398 views

Level shifter for WS2811 led strip

I'm trying to control a WS2811 Led strip with an ESP32. I'm using a logic level shifter to convert the 3.3V output of the ESP32 to 5V. I bought this level shifter (txs0108e) https://fr.aliexpress.com/...