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7/28/2019 Construiti singuri-Luminini pentru fotogrfii

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DIY LED photography lights

[Markus] hadbeen drooling

over some LED

panels to use asa soft light

source for

photography, butbeing a

hobbyist, he

didnt want to

spend a ton ofmoney to buy

them. He

figured that hehad enough

electronics

know-how tobuild his own panels, while saving a boatload of cash in the process.

He hoped to keep the total cost under ?100, so along with new items like LED light strips, he would

have to use some stuff he had sitting around, like the metal cooking containers that make up the body ofthe lights. While originally planned for use in a different project, it turns out that the cooking containers

were ideal for his lighting setup, since they are both durable and great heatsink material.

The remainder of the build is pretty straightforward. [Markus] used a pre-made LED dimmer to control

the panels brightness, along with some tinted plexiglas to diffuse the light while bringing the colortemperature into a more usable range.

While he missed his ?100 mark, the lights look great we just might have to build a few of them

ourselves.

Led Light panel kit for photography

by mkuha
http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.instructables.com/member/mkuha/http://www.instructables.com/member/mkuha/http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=http://www.electronicsinfoline.com/New/?go=aHR0cDovL3d3dy5pbnN0cnVjdGFibGVzLmNvbS9pZC9MZWQtTGlnaHQtcGFuZWwta2l0LWZvci1waG90b2dyYXBoeS8/QUxMU1RFUFM=


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Show All 11 Images
http://www.instructables.com/id/Led-Light-panel-kit-for-photography/?ALLSTEPS#more-anchorhttp://www.instructables.com/id/Led-Light-panel-kit-for-photography/?ALLSTEPS#more-anchor


4/11

I have been drooling after some nice led panels for a while now, but just can't justify spending a fortuneto buy them.

These LED panel give a nice soft light source for photography, saves electricity, robust and won't heat

much.

I am not a professional photographer, just enthusiast that sometimes has professional justify to build

silly stuff like this.

I decide to do two big ones and one smaller that i would add battery later for outside shooting.

Step 1: Planning and ingredients

My coal was to keep budget under 100 pounds for 3 led panels. Some how a 12v strip light felt like the

best way to start. Also 12v meant that its easy to find power for. car batteries, power supplies and so on.How much light I would want? Well let see 5 amp feels like maximum amount of power I want to draw

and 5M 300-SMD 5730 LED strip rope light white looked like a good model. (although later found it to

be too cool near 9900k) there is a warmer version also. 5730 LED where 0.5 watt each and strip lightwas split in group of 3 LED's, so these can be cut between these groups. That was a good start for some

calculations this site came handy.

http://ledcalculator.net/

So now I know that my bigger panels would take 99 leds and smaller would have 81 and you can left
http://ledcalculator.net/http://ledcalculator.net/


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only 36 on by switch, if you want to increase battery life.So where to house them. First looked into buying some aluminium briefcases for it, but then

remembered that I had previously bought some aluminium school cooking containers from 70s for

possible iPad and laptop bag, but now that project would wait and these cases would get a new purpose.

I think these where perfect for the task. bigger panels where built on one container lid as one panl andbotom

I wanted to able to dim this led although I know that it might be a possible problem and introduce

flickering specially in low power, but then I decided that I will be mostly run them full power and I justwent a head with a simple premade led dimmer.

Some switches i tried to find ones with bit of a retro style.

I think aesthetics are important I can find myself enjoy something I have built more if it also looksgood.

List of parts

3x Led dimmer 12/24 volt 8 amp, price of one 9, 3x power supply 5 amp, price of one 5

Led strip

5M 300-SMD 5730 LED strip rope light white 40, 3x power switch, price of one 2, 3x power plug

price of one 2aluminium tape, some electric wire

total 94

additional stuff, plexiglass 20, mounts 14, 3x photography light stand price of one 9

Step 2: Led placement

First I tested lights in groups this is important because I found out that 12 of my LEDs did not light up.

Remember to buy more than you need.


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So after getting rid of non working ones I cutter the strip in smaller right length strips. And placed thempre planned position. And started to cut out wires and place switches on right places to get an idea if all

would fit well.

I laid few layers of tape under led strips for isolation and then temporarely taped them in place.clear tape works here fine as it does not block reflections from the aluminium container.

Step 3: Dimmer

I opened one of the dimmers to see what it had eaten. See if i can reduce the size of it and I was really

pleasantly surprised that it was perfect layout and it even had dimming control with wire so I couldplace it freely.

note: Remember these kind of dimmers are very basic and works with Pulse Width Modulation

principle. witch means that when led is dimmed it actually cuts the current for really short periodsrapidly. You can't see this by eye, but when used for video or photography camera can pick up these cuts

and it looks like a flickering or produce artefacts when shooting video.This comes more problem when lights are dimmed a lot and high speeds for shutter time is used.Problem goes away when full power is used.

Step 4: Holes


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After that I took few measurements for rest cables. Then I took the LEDs off and drilled holes for DC

power input, dimmer control Knob and on/off switch. It's good to drill your holes for mounting also. Ifyou are going to add plexiglas or gel in front it's also time to drill mounts for that. For me it was a late

update so I did this in the end.


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note: buy round DC plug so you can mount it easy just by drilling one hole. My power supply had DC

2.5mm male plug so i bought corresponding 2.5mm female plug.

Step 5: Testing electronics

It was time to test electronics and see if everything would still works.

note: be careful that no electric connectors touch metal or short circuit when you test. duhh :)

Step 6: Taping to final position


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Then I covered all connectors with electric tape for insulation and used aluminium tape to tape strips inplace. So far with my tests these panels are very cool and the aluminium body displaces the heat very

well.

note. I used aluminium tape to maximise reflecting surface on the panel.

Step 7: All done


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2m 100 lux

with plexiglass

next to panel 2700 lux

1m 170 lux

2m 80 lux

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Construiti singuri-Luminini pentru fotogrfii