More than likely you've got some shorted wires touching the heatsink. I would check that first. A bad LED or a bad driver can also cause this sort of thing. check in that order for the problem.Hi guys! I need some help regarding my 20w Epileds Multichip hybrid which I got from AC RC.
I got AC85-265V 4*20W Waterproof PWM Dimmable Driver then PWM Dimmer and 4 pcs of EPISTAR 20W 19500K/455nm Hybrid Multichip.
My problem is when I open my light at 10% everything seems fine. But when at 20% one of my multichip starts to flickr and then cool white starts to turn on and off. THen at 40% all for are now starting to turn on and off.
I've been running it for a month now the only thing I did before this problem happen is I added 10 3w bulb though it is in completely different series as well as different driver I only used the same frame. Also I forgot to unplug the driver for 24hrs though dimmer is at 0.
Help please. Thanks!
Minimalistic multichip DIY LED build
- Thread starter maglofster
- Start date
Krazie4Acans
New member
Here are pics of the build. Many enormous thanks to O2Surplus for his help laying out my board for this project! Take a look and tell me what you think. Krazie :jester:
http://s1323.photobucket.com/user/Krazie4Acans/library/Krazies%20Kitchen
I still need to get some pictures of them over the tank. That should happen soon.
http://s1323.photobucket.com/user/Krazie4Acans/library/Krazies%20Kitchen
I still need to get some pictures of them over the tank. That should happen soon.
Last edited:
Krazie4Acans
New member
I forgot to add that my board is capable of 4 channel input and 6 channel output. The Lumia 5.2 only has 5 channels so the 6th LDD location is left empty and there is a jumper that allows that channel to be used to control the fans instead. If you are using all 6 channels out then you can software select which two outputs are paired together or run two channel completely software controlled instead of based off of the Apex input.
You can also load software on it to make it work like a Typhoon and be a complete LED controller.
Quite versatile little board. Krazie :jester:
You can also load software on it to make it work like a Typhoon and be a complete LED controller.
Quite versatile little board. Krazie :jester:
Krazie4Acans
New member
I laid out the circuit and connectors. He just did the stuff that was outside of the 80mm X 100mm (free eagle footprint) and did the traces. That picture labeled parts parts and more parts is all of the chips, resistors, capacitors, resonators, LEDs, regulators, etc. The pictures showing the top of the three fixtures together you can see the RJ45's have been populated. I sent the files off and did all of the soldering. Krazie :jester:
Last edited:
Neat...O2 put some files together for me. 5 channels...I used A6211's that ran 1400ma, RJ45's and a 10 pin molex connector.
Here's a couple pics. http://i.imgur.com/BKA6h96.jpg
http://i.imgur.com/kIVNHKA.jpg
Here's a couple pics. http://i.imgur.com/BKA6h96.jpg
http://i.imgur.com/kIVNHKA.jpg
Krazie4Acans
New member
Not bad. Although having both power and PWM inputs as RJ45's would not work for me. Someone would plug the wrong one into the wrong spot and fry that board. I like the molex but my setup needed something that was more simple and would not require a lot of cable making time (thus the screw terminals).
Did you build those boards up and use them? I'm guessing you had heatsync's on teh back of the board?
Crap I forgot we were on the LED thread and am totally derailing the topic.
Sorry BOT!
Krazie :jester:
Did you build those boards up and use them? I'm guessing you had heatsync's on teh back of the board?
Crap I forgot we were on the LED thread and am totally derailing the topic.
Sorry BOT!Krazie :jester:
Nice! The lumia parts allow for a very clean build.
Krazie4Acans
New member
Nice! The lumia parts allow for a very clean build.
Clean and they work really well. Like I said I'm really impressed with what these mutichips can do. The color when the channels are all at the same output looks like 20K MH to me. If you don't like that much blue just dim the blue channel back a little and the light goes crisp and white. Krazie :jester:
Krazie4Acans
New member
So what is the 6th channel LDD for on your driver board? Krazie :jester:
Krazie4Acans
New member
The LDD's dim to 0 so I just use the blue only channel dimmed at 1% for my moon lights and it works great. Since I have a controller running them I can even choose to turn some off completely and leave others on at 1%. It saves an extra driver.
Krazie :jester:
Idefixes
New member
An another multichip project...with à little single led touch
Harware is up to time under construction the whole size is 95x41x10cm
Some sketches :
Led side :
Fan side :
Led configuration is based on 8 same modules that each one integrate 25W 5ch (lumia 5.2 like), 50W 30000k used@25w, one Rebel ES royal blue, one 3W 420nm, one OCW (470/500/660nm) fixed on one 250x150x25mm heatsink and blowed from one 140mm 166CFM/20db fan
One module
uper side from fixture up to time
Between the heatsink wil take place all driver, fan control, and PWM ouput connection through CAtT6 FTP wire. Arduino will control all power level and ramp up and down.
I just finished the driver area, fan control, PWM oupt connexion
Marc
Harware is up to time under construction the whole size is 95x41x10cm
Some sketches :
Led side :
Fan side :
Led configuration is based on 8 same modules that each one integrate 25W 5ch (lumia 5.2 like), 50W 30000k used@25w, one Rebel ES royal blue, one 3W 420nm, one OCW (470/500/660nm) fixed on one 250x150x25mm heatsink and blowed from one 140mm 166CFM/20db fan
One module
uper side from fixture up to time
Between the heatsink wil take place all driver, fan control, and PWM ouput connection through CAtT6 FTP wire. Arduino will control all power level and ramp up and down.
I just finished the driver area, fan control, PWM oupt connexion
Marc
Idefixes
New member
And one is lefting.....moon lite on black board just behind FTP socket. I need that amout LDD as i will use four 5ch led duo (2 in serie)=> needs 20 driver
Marc
sfsuphysics
Active member
Out of curiosity, what are some of the pluses and minuses?
I've built more "3W/5W" 48-emitter setups that I care to do (and that number is 4), but the Lumia seems like an interesting idea, especially since I'd have to drill at most 2 holes (4 for safety) to attach it to a heatsink. It isn't going to save any money really, but it does look interesting.
Just curious what your views are (other than colors look nicer, which I agree with completely LEDs vs other lighting technology doesn't seem to hold much)
Krazie4Acans
New member
Color banding, disco effects, off spectrum colors lack of individual color control due to 1-2 LEDs of one color, Drilling and tapping heatsyncs, Expensive drivers, won't dim to 0%, etc...
Lumia was simple, clean, awesome coloration, good + growth, and easy to wire and mount. The makers heatsync made it even better. Krazie :jester:
