DIY LED Projector




Everybody likes to watch their favorite movies or sports on a big screen so they plan to buy a video projector. I am also crazy about projectors, but they are too costly. HD projectors available in the market have a starting price of approx. 30,000/- INR. This is way out of my budget so I planned to make myself an HD projector that projects about a 100" screen.

After lot of research on Google I decided to make the pj with a 100w high power led and a 7" 1280*800 LCD panel. The LED consumes very little power and has a very long life.

Update: Look my 2nd version of this projector:

Step 1: Here Is the Video " How I Made This Projector "

Step 2: Things That I Used in My Pj.

  1. Play wood (mdf) sheet to make box
  2. Fresnel lens. I used 120mm fl and 185 mm fl

  3. Triplet lens. I used 200mm fl

  4. Condenser lens

  5. 100w high power led with driver

  6. LCD panel and its controller. I used 1280*800 7”
    HD lcd and controller.

  7. 12v adapter for exhaust fan and lcd

  8. Cpu exhaust fan to make projector cool

  9. CPU heat sink for led .

Step 3: The Basic Concept of Making Pj

Step 4: Lens Arrangement in Projector -

Step 5: Final Projector Ready for Action

Front and Back View of Projector

Step 6: Component Detail and Total Cost

After lot of comments i update here component detail and total cost to make this projector

1. 100w led and driver : One can easily find 100w led and driver on I bought mine on @ 1500/- INR.

High power 100W white

Chip size: 24*40mil

Color temperature: 6000-6500k

Luminous intenity: 8000-9000lm

Forward current: 3000mA

Driver voltage: 30-36V

Light angle: 160deg

Integrated scheme: 10 in series, 10 in parallel

2. Fresnel Lenses : It is very hard to find perfect combination of fresnel lenses in India. Luckily i find perfect set of lenses on The total cost of 2 fresnel lens occur around 1500 /- INR.

Fresnel Lenses:

Focal Length: F120mm Back Fresnel,

Focal Length: F185mm Front Fresnel,

Material: PMMI Material

Groove Pitch: 0.3

Size: 180mm X 130mm with mounting holes.

3. Triplet Lens (projection lens) : The total cost of triplet lens is 3600/- INR. It is also bought from

200mm Projection Lens


Fixed Focal Length: F200mm

Outer diameter: 90mm

Lens Diameter (Aperture): 75 mm

Focus range: 45mm

Material: Strong Aluminium and Strong Plastic

Coating Material: Coating 420-680nm multi layer broadband anti-reflection coatings

Control Standards: Diameter: +0 /-1%. Focal Length: +/- 1.5%

4. LCD panel : I use N070ICG-LD1 HD LCD Panel and Controller Kit in this projector. It is the best available LCD in 7" size and controller support all input like HDMI, Pandrive, AV,TV in and VGA. It is also come with remote so easily can control pj remotely. The total cost of this LCD with controller around 6000/- INR.

LCD Features:
N070ICG LD-1 is a 7 inch HD LCD with native resolution 1280 X 800 It delivers a sharper image with good colours. This is very unique LCD.

Size: 7"

Backlight: LED

Resolution: 1280 X 800

Ratio: 16:10

Colours: 16 6 Bit dithering)

Glass Thickness: 0.25mm

Make: Innolux

Contrast Ratio: 800

Pin: 40

Surface: Glare

Operating Temperature: - 20 to + 60 degrees

Controller Features :

HD Controller, will work with N070ICG LCD. This controller comes with remote and you can operate almost all with remote itself. The USB port can Play Most of the Videos Format flawlessly.

5. Condenser Lens: I also use condenser lens to increase brightness of screen. This Rectangular Aspheric Condenser when used, the brightness throughout the corners are brighter. This lens come around 650/- INR

DIY Projector Rectangular Aspheric Condenser Lens


Overall size : 62X52

Focal Length: 70mm

Suitable LCDs: 7" and below

Suitable Fresnel Lens: F120 Back Fresnel.

Mounting: Condenser back surface Area should be 1mm Away from LED surface area for better results.

Total Cost Of Projector :

100w led and driver 1500/-

Fresnel lens 3000/-

Triplet lens 3600/-

LCD and Controller Kit 6000/-

Condenser Lens 650/-

12v adapter, 2pcs. cpu fan, box material etc cost 500 /-

Now final cost of Projector is 14800 /- INR

4 People Made This Project!


  • Backyard Contest

    Backyard Contest
  • Sensors Contest

    Sensors Contest
  • Pets Challenge

    Pets Challenge

205 Discussions


Question 9 months ago

Hey, Do we need to prey open the LCD and use only the display panel out of it? Or use it as is?


Question 1 year ago

Dear sir, instead of triplet lens, can I use sigma aspherical zoom lens??? Fl length is 28-200mm


1 year ago

I have v59 universal lcd controller board along with N070ICG LD1.

I need power supply. which one is suitabl?

12v 2A is okay?


4 years ago on Introduction

So I see that the LCD you selected has a native resolution of 1280x800, but does it support higher resolutions? That is, if I plug in my laptop will this allow me to select a resolution of 1920x1080 and down convert the resolution to fit the monitor?

5 replies

Reply 2 years ago

No it converts 1920×1080 into 1280×800


Reply 3 years ago on Introduction

One way that im pretty sure is legal is use a dvd drive on a computer and insert a store bought dvd using windows and use vlc player to make the video fit your screen size if your idea doesnt work. I think i read that playing dvd's is legal on windows but not linux. As always though check yourself to make sure what im suggesting is legal.


Reply 3 years ago on Introduction

Thanks for the info. Its sets me in the right direction to build one of these.


3 years ago

how about use screen 14 inch with 550mm focal fresnel or 220 focal length

1 reply

Reply 2 years ago

Any focal fresnel lens you can use but it should match focal length with projection lens and projection lens focal length need more than front fresnel


3 years ago

ok nice projector i'm look to build one but i think i find an error please tell me if i'm wrong: you use a 70 mm focal condenser lens but you put the back fresnel at 120 mm like there is not condenser lens... but i think you have to move the fresnel 70 mm to focus right to the focal lenght(focal point) of the condenser lens! it,s that right???

1 reply

3 years ago

is this lcd is good enough to provide the similar output as compare to lcd having higher resolution

7 inch 800*480 TFT LCD Display Driver Board HDMI VGA 2AV for Raspberry Pi

please reply

1 reply

Reply 2 years ago

800×480 is not enough for great performance you need 1200×800 or higher resolution


3 years ago

I have a problem. I use a 1200 led flood light instead of a 100 w led. The flood light look really bright , but when shine through the LCD panel it barely even bright and even dimer than my screen before i remove it. SO SHOULD I GET THE 100 W LED BECAUSE MY FLOOD LIGHT IS NOT BRIGHT ENOUGH OR THERE IS SOMETHING WRONG WITH LCD PANEL?