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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93 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
356 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
97 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
119 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
68 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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194 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
94 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
215 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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72 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
78 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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1answer
1k 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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185 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
816 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
160 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
41 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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94 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
127 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
133 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
99 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
77 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
385 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
990 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/...
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1answer
2k views

How do I reduce amps in a DC circuit? [duplicate]

I'm trying to replace my AC adapter with a battery. The AC adapter output is 12v @ 500mA DC. I can get a 12v battery, but I can't find one that outputs exactly 500mA. I'm trying to power a strip of ...
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1answer
29 views

Led Strip switches

Good day everyone. I am not a pro electrician, I am just a student who wants something new in our house. I hope that you can help me with this. And this will be much appreciated. I want to put led ...
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48 views

LED Strip - Wire Size & LED Controller

First Question: I bought a few rolls of high density 5M individually adjustable LED strips - 14.4 Watts/M @ 24V which equals to 0.6A per meter. I was advised I could run up to 10M in series which is ...
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3answers
2k views

Is it good to wire WS2813 LED strip DI and BI together?

I have so far only worked with WS2812 strips and understood, that the WS2813 have a backup data line. But how do I connect the first LED to my Arduino (acts as a controller)? Many tutorials said I ...
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1answer
135 views

Cutting and joining a LED strip that has no solder pads?

I ordered and received WS2812B 5050 RGB Individual Addressable LED strip and for the first time I received an LED strip without cutoff points and with no pads. The product images and description do ...
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4answers
272 views

Understanding “Current Draw” in terms of “Ohm's Law”

I'm having trouble understanding Current Draw as it relates to Ohm's Law (V = IR). I have a power supply rated at 5V and 500mA. I'm trying to power a string of LED lights. According to my ...
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2answers
110 views

24V LED Strip Circuit - Switch, Breaker & Wiring Size Requirement

I am running a long LED strip (24V, 21 meter, 0.6A per meter, so technically 13A). The 24V PSU supplying power to the strips is to be connected to a switch that is rated 240V, 10A & 2400W. ...
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1answer
97 views

30 Meter in series LED SMD 5050 60 led/m 12v RGBW

I want to run 30 meter Led length in series in a room on the ceiling. LED specifications (according to the supplier:) LED Type: 5050 RGBW LED Light Strip Quantity: 60 LEDs / Meter Working Input ...
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1answer
104 views

24V LED strips connected in parallel - How should the data line be connected?

i have read around and finally understood how led strips should be run in parallel for my staircase project. However, i have 1 last question that needed an answer. Please refer to the 1st attached ...
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44 views

Adequate Power Supply for 300 Daisy-Chained LEDs [closed]

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 ...
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0answers
26 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 ...
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3answers
201 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 ...
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3k 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? ...
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2answers
222 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 ...
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1answer
107 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: ...
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0answers
45 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). ...
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2answers
287 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?
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1answer
164 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?
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3answers
1k 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 ...
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0answers
170 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 ...
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0answers
120 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 ...
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2answers
3k 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....
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2answers
848 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 ...
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2answers
148 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 ...
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1answer
481 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 ...
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1answer
71 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 ...
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0answers
1k 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 ...
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1answer
82 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 ...

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