led

My goal is to power 600 WS2812B RGB LEDs at full power. Currently, when all LEDs are set to white (255, 255, 255) at max brightness, a color gradient from white to red is displayed. I discovered that this also happens when, for all LEDs at max brightness, any one RGB channel is maxed out and...

Hello, I have a npn transitor configured as a switch 0v to 5v gpio pin with base resitor 2k and a 50k pull down resitor in a volatge divider configuration. I wanted to know if this pull down resitor will be okay with Ic current about 20-30ma or I need to decrease it more as the rule of thumb 10x...

I'm looking to get some help in designing a board that takes an input voltage and confirms if the that voltage resides between V = 27.5V and V = 29.5V without an external power source. When the input voltage is between this range I would like an LED to light up. So far I've been exploring using...

Hello ! I've been working on a project and needed some help with reading datasheet to LEDs because I don't know one thing and ask about one of my ideas. So I was working on to create a Lamp with high power LEDs independently controlled to change the dimming. And so the LEDs are 6W, 1A so I...

Not sure if this is the correct area to post this in, but I need some help. Yes, this is kind of dumb & pointless, but I think it would be cool to have this functionality. I am looking to install a 12 volt LED light bar on my truck. I would like to use a 3 way switch to control the lightbar as...

I'm installing lights in a camper van and for aesthetic reasons, insist on my recessed ceiling lights having gold/brass trim. The problem is, they don't appear to make those for 12V systems (at least within my budget). Is it possible to run something like this on 12VDC? Important to note that...

I am a complete beginner at designing circuits and my English sounds like a 5-year-old talking. So, please beer with me. I was thinking of building an aquarium light. As plants need a full spectrum of light to grow properly, this is the selection of colours I came up with by watching many...

Hello , I want to turn on LED when two IC PINs suppose PORTA1 and PORTA2 are shorted, As long as they are shorted the LED should glow and when not shorted then LED should be off. Please help me withe the C embedded code.

I am used to building novelty led chaser kits and diy circuits that chase. It’s usually a single led lighting up and moving through a line or circle as one on then off next on then of etc around or down a line of LEDs. I want a circuit to control 16 LEDs in a chaser effect that has the reverse...

Hello there, I'm currently trying to get a massive greatsword to light up using an LED array that goes up the blade controlled by a hold button. This isn't my first lighting project, but it is my most ambitious so far. I'm in the pre-prototype phase right now. I'm still trying to work things...

What happen if we mix L and N to 220v (AC) COB LED? Will it be burned out?

Does anyone here know where I could get a Longtek 6052 X-S, as mentioned on these websites? 1. https://www.electronicshub.org/digital-alarm-clock/ 2. https://makingcircuits.com/blog/how-to-make-a-simple-digital-clock-circuit-explained/ Are there any alternatives to it that works with my...

Hello everybody! In a small project I have a LED flash that should light up synchronized with a sound being played from a micro board when a button is pressed. So far I have realized that without a problem. Only thing is, that LED will lighten up instantly, while the sound boards needs half a...

I have a general question, but it refers to a specialty brand. Im looking to redo an LED "Wall" which is just a bunch of rolls of ribbon on some thin plywood painted white, that's about 18" back from some large pieces of milk plex to create a "wall of light". I plan on redoing it with this...

Hello everyone, It is my first time creating a PCB using Easy EDA, and I would like to add two RGB LEDs to my PCB. I am a little bit confused as to how to wire it. This is what I have now: I understand that to control the color of the LED, I need to send a different PWM duty cycle to each of...

Hi all, I am a compulsive DIY’er. Took electronics in HS many years ago. My wife has solar charging LED mushroom lights. One light failed, wired in parallel. I purchased a 5mm 20mA white light and soldered it in place. Colors are a lot different. Old light is a yellowish white light and...

i have a uv a led with the following specification optical watt 0.103W beam angle 15 degrees distance from surface 2.4cm also the circle created by my calculation is 0.313 cmsq is the irradiance 0.103/0.313? i have attached spectral result test if that helps

Hi, I’m working on a project that requires about 7 discrete LED’s. I’ve always just used a dropping resistor in previous projects. For this project I wanted to try to use a driver instead. I ended up getting some Diodes Incorporated BCR421UW6-7 linear drivers to test with. I bread boarded them...

I have an issue with a very simple small board I designed in EasyEDA pro (I'm a novice so if the answer is easy, my apologies). I'm not sure I correctly connected the MOSFET in the schematic. Reference to Datasheet: https://atta.szlcsc.com/upload/public/pdf/source/20140314/1457707013919.pdf Part...

VXO7805-1000 DC to DC converter supplies 5V. When the circuit is attached via USB, there is a voltage drop to 4.5V on the 5V pin of the ESP32 (DevKitC-32D and pinout). I tried adding a 10uF capacitor between ground and EN (RST) as mentioned here. I then tried 330 uF. No luck. This seems to...