1. I

    Can I power LEDs of different forward voltages connected in parallel with a single constant current source?

    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...
  2. A

    Diododes Incorporated IC | Issue on dimming | LED driver help

    Hello, guys! Recently, I've been facing issue on dimming LED drivers from Diodes Incorporated. As example, the LED drivers I'm in trouble with is: AL8843SP. On datasheet, the manufacturer says CTRL pin must be drive with: open drain output or push pull output stage. I build those circuits, but...
  3. PatteGris90

    Led boat lights

    Hi all, I am trying to build some underwater lights for my boat. I am using 10 pcs of 3W RGB 6 pin leds in series and i have tested the output. I am currently using a constant current constant voltage driver. I would like to make a pcb capeable of driving the 10 leds and controling them with...
  4. A

    AC DC rechargeable Led Bulb Driver

    AC DC rechargeable Led bulb driver mainly build with two different ICS. First one is drive several leds in series when power is available. Second one is drive several leds in parallel, also charge the lithium battery, when power cut happens the second IC drive the leds in parallel using the...
  5. avi9526

    LED driver with minimum duty cycle of 0

    hello I have a practical task to make a simple LED lamp. I was using LDD-1000 for that purpose. But it does have minimal duty cycle of 20% (output is filtered so it's 20% of max. current) . Was looking for an alternative that could provide smooth control of current from 0A to 1A. Kinda lost in...
  6. T

    Best method for converting PWM to analog signal?

    I want to make a circuit that will convert a PWM signal to an analog signal. I want the circuit to be able to work on higher frequencies as well though (up to 15 kHz). Would an RC filter be the best method? Any reference design examples for this?
  7. -live wire-

    How to drive power LED?

    What is a good driver for a 30W RGB LED? I got it ages ago then forgot about it but might want to use it in a project now. Here is a picture, also I would like the driver to be able to be controlled with an arduino. This is the link, but don't worry I also put a heatsink and fan on the back of...
  8. S

    LM3429: LED driver make a lot of noise on FM-radio

    Hi, everyone! I've made a LED buck-boost (BB) driver based on LM3429. It's for automotive lighting, so Vin = 9-14.5 V, LED string consist of 10 white leds. V_out is about 30V, I_out=1.3A. All components were calculated according to LM3429 datasheet for BB topology. All datasheet recommendations...
  9. V

    Need to identify proper driver for a LED light

    First time repairing a LED. A year after purchase, my barn light started flashing non stop every seconds. At first I thought it was the light sensor but changing it did not solve the issue. The next possible culprit would be the driver, but unfortunately there is nothing written on it to...
  10. L

    How to dim a dimmable trafo with a touch dimmer

    Hello forum! I am a beginner in electronics and for a lighting project I bought a dimmable trafo and a touch dimmer with the hope to be able to combine these. The trafo is a MeanWell LDB-600L, that is a 600mA constant current trafo with a "DIM" input that takes either a PWM signal (100-1kHz)...
  11. pravardhan

    LM317 as LED driver with two constant output current selection

    Hi All, I wanted to have the LM317 as LED driver for the DRL (Daytime Running Lights) in my car. I want the DRL current to be 200mA and have chosen 6.2 ohms. Now I want the DRL current to be 50mA when I switch on the Fog lights, hence I have chosen 25 ohms (if this is non-standard then I will...
  12. A

    design 4A led driver for automotive application

    hello I am designing high power led lamp for vehicles using this led. led datasheet this led has If up to 6A and Vf is around 3 V, I am going to use it at 4A for longer life. My input voltage source is car battery so voltage range is 12V - 16 V I am hoping to connect two leds in series. since...
  13. H

    A current-source LED circuit with an op amp

    Dear Team, Please see the attached image which shows the circuit of driving LED using an opamp. We are fixing current through LED using opamp. I am clear about how they obtained the current equation.Isense=Vin/Rsense because opamp is in negative feedback My question is why they are not...
  14. prensmiskin

    How can I communicate the computer with the led screen

    Bilgisayarı led ekran ile nasıl iletişim kurabilirim. Bilgisayarla led ekranı rs 485 protokolü ile nasıl iletişim kurabilirim. Led ekranda c ile yazılmış bir yazılım var. Java se kullanarak bilgisayar led ekran ile iletişim kurmak istiyorum. led ekran görüntüsü Java dilini kullanarak Android ve...
  15. B

    My first electronics project, array of 9 Cree XP-E2 with dimming

    Hi all, I'm working on a micro controller project to do race timing for rowing regattas. It's coming along pretty nicely and I want to add one component: A finish light that will be turned on and off by the microcontroller. The light needs to be seen from a distance in sunny conditions. I want...
  16. Dan Aronin

    XL6005 Dimming fuction

    HI all, I want to understand the proper way to make a dimming function for the XL6005. I found some schemes that suggest using the EN Pin: And some that use the FB Pin: So which one should do the work and what PWM signal should I use?
  17. davidfet

    Low voltage and current LED on 6 hours / off 18 hours, repeat

    Saw this thread on the same topic, but it was suggested I start my own, so here goes. Former thread: https://forum.allaboutcircuits.com/threads/cd4060b-timer-circuit-design-12-hour-on-off-repeat.156495/page-2#post-1511407 Looking to power my Japanese garden lantern with a 3.85v phone battery...
  18. Dan Aronin

    XL6005 understanding the datasheet

    Hi all, a driver circuit needed for lighting a 30W LED* (one color) - I had a look at the XL6005 datasheet and wanted to make sure I understand it properly based on the following diagram**: 1. To drive the LED with 300mA I should make RS = 0.73 ohm (ILed=0.22/0.73=0.3A) 2. To limit the max...
  19. eliasklk_04


    Good night. I bought this flashlight for my bike: https://www.ebay.es/itm/Luces-Bicicleta-Luz-10000LM-Impermeable-3XT6-LED/292872854958?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 But the light that comes out seems very little to me. I think it has more potential. Could I modify...
  20. adrumsolo4u

    Need Help with LED Driver design

    I'm trying to design an LED driver that takes a ground as ON, performs a logical NOT on it, and sends it into an N Channel MOSFET. The MOSFET will give ground to a color channel on an LED strip. LED Strip Driver-schematic.pdf I believe I have taken care of everything, but to be honest, this is...