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How to make a Dmx controled led par can light? Answered

I'm trying to make a led par can light that is controlled by a dmx mixer and powered my 110 AC. The application is pro audio and dj'ing. There are plenty of models like this for sale at many retailers but they are far to over priced. Any instruction or reference would be very appreciated, as I am a newbe.



8 years ago

Few websites to check, and few things to research and familiarize with..
sure-electronics for good prices on 5mm leds, resistors, a PICKit 2, or PICKIT 3, crystal/oscillator chips and so on... but you need to calculate how many of what type of led's you plan to use and work from there.. will it be 30R/30G/30B with a step down and PWM driver, with a dmx setup you built, or will it be 1Amp/3Amp White or RGB's?.. which will require more parts, and a well planned heatsink, and optics for either a beam or wash effect..
DMX512=Rs485 protocol, there are lpt to dmx,rs232-dmx and usb-dmx..

depending on your budget and time at hand, its a 50/50...
I am still digging around for the answers for my ideas, but am closer.... truley best investment is a pickit and some coding to start playing.. starting with led matrix and my experiences working in staging and productions and going from there...
heck, buy some manlfunctioned can's from online and trouble shoot them... they cost from 10-50$.. or dig a little .. you'd be surprised what you can find... check links on sites i gave, and i hope i started to help... a usb to dmx setup from entec or such maybe more effective for your budget for control and such?


www.microchip.com ...
and last but not least the more important link to dmx setups..


9 years ago

I am looking to possibly do the same thing on a small scale. Just one or two cans that I can mount to monitors and they will operate with the music but that project is a little further down the line. I don't know about making them work like the professionally made one but if you really want them make some like people did here and drop it in a par can. A lot of people used either the base of a lightbulb or made it to be wired straight into a 110v socket. You may already know that is possible use just need (and I may be leaving something out) a big enough resistor and cap. Good luck and I hope you post an instructable when you get it going ... I will hopefully make on soon myself.


Answer 9 years ago

Well as for just the 110v thing the problem with that is that the led will only react during one half of the sign wave, which will cut the intensity of the led in half. It is also my understanding that you can't just simply double the max power of the led because this will fry the diode like KFC. My biggest problem is the dimmer for the DMX. In the intractable Controllable RGB LED system for your home or office by Brilldea they show how to create beautiful rgb led works of art with high amounts of dmx channels, but it requires a Prop Blade which decodes the dmx and controls the led painter. The painter can not be more then 15 feet away from the Prop Blade this means to me that I have to run ribbon wire to each par can, and I have to have Both boards for every 2 sections of trus. Not only this but that puts huge restraints on the flexibility of the set up. An amazing system for controlling complex systems but my purpose is more to cut down on wash lights, more then it is to create such a immaculate display. I'm looking for a dmx dimmer that is inexpensive and can be stored inside of the par can it self. I simply would like to run power to it , and then run dmx I/O.


Answer 8 years ago

Its true that with straight ac you would lose half of the runtime but if you put a full bridge rectifier on it then you will utilize the full cycle. But ive never heard of anyone using straight ac without first bringing it down to around 12 volts. Maybe youve got some other kind of led that im not familiar with but you can figure that bit out. But if your source voltage is higher than you led forward voltage then you can put a bunch of them in series, which draws the same amps but more volts. I use an 18 volt supply in my room which is a bit higher than most people use but i like it because i can have about 5 leds in series depending on what type im using and then from there of course you add more in parallel. This is really obvious but you can always just use a resistor to limit amount of power the leds draw (which you always do btw) to keep from making fryodes. Im not really sure about the dmx part of this though cause i havent had experience with that