LED SunGun

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About: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.

Intro:

A follower of mine on Instructables wanted to build a LED light to be used in Photography and wanted my help,

so I took up the challenge and built this LED SUN GUN  which runs on AC. 

It is cheap in comparison to the ones sold in the market and as it runs on AC there is no battery problems.

Step 1: Parts You Will Need…..

Sixty- Extra bright, white 8mm LED’s

One- AC transformer 220volts to 12volts of 2Amps.

Four- 1N4007 Diodes for bridge rectifier.

One- Condenser 470uF anything from 25 to 65 volts will do.

One- ON OFF switch.

Wires, solder, wall plug, tools etc;

Step 2: Old Sungun….

I had an old Sun gun (halogen tube type) in my junk with a fused tube.

I opened up the casing and threw away all the parts inside it.

Next I took a PVC sheet and cut it to the required size to be used as a base for my LED’s.

Step 3: The Circuit…

60 number of Extra Bright 8mm White LED’s are used in this Sun Gun.

The LED series/parallel 6 x 10 array uses 60 LED's exactly.

This circuit uses 10 parallel rows of 6 LED’s in series as shown in the Diagram.

Follow the Circuit and make the LED arrays.

The calculation:-

Transformer output without load is 14.4 x 1.4 = 20.16

20.16 / 3.5 = 5.76 or 6 LED’s in a single row.

8mm LED’s 3.5 volts consumes 30mA current.

The transformer puts out 2A = 2000mA.

Each row consumes 30mA, so you can put 2000/30 or 66.6 rows,

but round DOWN to get a maximum of 66 rows.

OR 66 x 6 = Total 396 LED’s.

 

For 3 panels of 10 rows each, the total comes to 30 rows: with each row consuming 0.30 amps (30mA), 30 *

0.3 = 0.9amp, which the SINGLE 1N400x bridge can handle fine. It’s ONLY when you have more than 30

rows that you need worry about the Double Rectifier.

 

Step 4: The Power Supply…

A 220VAC to 12 VAC Transformer of 2Amps is screwed on to the handle of the Sun Gun with its own PVC housing.

A Bridge Rectifier of Four 1N4007 Diodes and a Condenser of 470uF / 35 volts is used to convert AC to DC.

So you get 2 Amps of Direct Current to run the LED’s which is more then enough.

A 2 Amps Transformer is used because if the light is inadequate then you can add

two more Panels of 60 LED’s on both sides of the Sun Gun,

so the total numbers 60x3=180 LED’s of light will be more than enough.

Step 5: Transformation.....


Here you can see how an old, power consuming Sun Gun has been converted to a Powerful LED Light, suitable for Photography..

SWITCH ON AND ENJOY...............

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    30 Discussions

    0
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    Dipankarmojontali

    Reply 4 years ago on Introduction

    You can try and put a electronic fan regulator in place of the switch, which has a capability to work up to 5 Amps.

    0
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    mojontaliDipankar

    Reply 4 years ago on Introduction

    But r they PWM devices ? otherwise normal dimmers cause flicker..have u tried it ?

    0
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    Dipankarmojontali

    Reply 4 years ago on Introduction

    I said you can try, I have not tried it.....

    The other way is to divide the 10 rows to 5+5 and put a single pole double throw switch (SPDT) .

    0
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    Dipankarhmunir

    Reply 4 years ago on Introduction

    For 3 panels of 10 rows each, the total comes to 30
    rows: with each row consuming 0.30 amps (30mA), 30 * 0.3 = 0.9amp, which the
    SINGLE 1N400x bridge can handle fine. It’s ONLY when you have more than 30 rows
    that you need worry about the Double Rectifier.

    0
    None
    DipankarNick_Tesla

    Reply 4 years ago on Introduction

    It is working well...........

    For 3 panels of 10 rows each, the total comes to 30
    rows: with each row consuming 0.30 amps (30mA), 30 * 0.3 = 0.9amp, which the
    SINGLE 1N400x bridge can handle fine. It’s ONLY when you have more than 30 rows
    that you need worry about the Double Rectifier.

    0
    None
    tbarot

    4 years ago

    Are the positive and negative wires interchanged?

    1 reply
    0
    None
    Dipankarrajath

    Reply 4 years ago on Introduction

    Series and parallel are both required to distribute the load of the Transformer.

    0
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    rajathDipankar

    Reply 4 years ago on Introduction

    Great thank you. I think I will be making it the same way you have mentioned Will tell you how it goes. Thank you

    0
    None
    Dipankarrajath

    Reply 4 years ago on Introduction

    Sorry folks, there was some confusion in the Power supply which now has
    been rectified.........Thank you all for pointing it out....

    0
    None
    tbarotqs

    Reply 4 years ago

    At last someone agrees with me! Thnx qs