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How could I build this in a cost effective method? Answered

Hello, I recently went to a Camera supply store and fell in love with this amazing light..

Its a Fotodiox LED 1000 ASV, you can google it or look on fotodiox.com to get a better idea of what I'm trying to accomplish

I would like to make one.. so far I have this is mind.. I can buy a lot of about 1000 LED's for really cheap.. Mirror plexiglass maybe about a 12inx12in to mount all the LEDs and a potentiometer to dim. I would like to run on 12 volt simply because it gives it more power options for my needs, the one thing I'm kind of confused on is, Am I really gonna have to wire 1000 Resistors to make each LED 12v? Or is there a simpler method.. Also, power supply is an issue, I am not sure if I can just wire all the LEDs down to two wire for a regular 110-220V Input, 12v Output adapter.. Do I need an LED driver of some sort? Especially If I want to be able to dim. Building the Housing and stand shouldnt be an issue, Its more the electrical part where I am concerning myself with. I'm pretty mechanically inclined, I do automotive 12v as a profession and hobby, I'm just recently getting into "higher voltage" =D "I'M READY TO STICK A FORK IN A SOCKET!!" lol, can anybody give me any tips? details? or even how they would go about doing this? Any advice is better then no advice.. and any direction is better then starting lost, Thanks in advance! I Will start making an instructable soon once I get my supplies in (LED's, Mirror Plexi) Considering that where I have to start.

Discussions

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iknowvations

7 years ago

Before trying for 1000 leds straight way how about doing it for 100 leds first & then scale up ? Safe & sure shot learning method ! You will learn a lot this way about driving & dimming LEDs.

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Higgs Boson

7 years ago

if you connect the LEDs in parallel you could probably connect them in decent sized groups each group only needing one resistor. Worked fine for me if you look at my instructable for the alternating LED display, I was able to put about 30 in parallel, and they still had a decent output. Nothing like 1000 though. You might look into using pulse width modulation for brightness control. You could probably use a 555 in an astable state for this. there are a lot of tutorials on this website on wiring the 555 like this. You could also simply turn some LEDs off to make the light dimmer, and have them in groups that turn on and off together. Just a few ideas though.

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steveastroukHiggs Boson

Answer 7 years ago

Paralleling LEDs, of uncertain origin, is a BAD idea.

Better put them in series strings

Steve

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iceng

7 years ago

  • Depending on the LED you choose to use, you can have 3 to 5 in series with one resistor.
  • There are several sites that can calc component values 4 U
  • Dimming can be done lots of ways.
  • If luminosity is all you need just turn some off.
  • There are circuits or ICs that can change light levels..
  • How many LEDs are you planing to use ?
  • LEDs release heat. a thousand will melt your plex.
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