17 February 2010

Simple LED Panel Lamp

LED panel lamp:

LED panel lamp
Well, yesterday I got attack of conscience and decide to make something local to improve world power shortage. I rebuild old halogen 12W lamp in my table lamp on modern LED light.

Halogen 10W:

Halogen 10W
This was reason which push me to work. I have electric power AC220V and it's transformed to plain AC12V which drive this lamp with 1A...o light and heat with 12 W. Very hot!

Heat:

Heat
You can see what heat of 12W do... plastic is melted. Well light color is warm about 3000K. Its not day light which we like much.

Eternal plexi:

Eternal plexi
I took 5mm Plexiglas 120x80mm, drill holes for LED foots. Also I shall rectify AC to DC current.
 

Serial:

Serial
LED China. 11mm dia. 3.6V and 20mA. Each.And I have 12VDC output.What to do?
I shall connect LED serial !-so 4 leds shall easy hold 14.4V! In my case 12V divide with 4 is 3V. Less. OK.


Mirror:

Mirror
I took alcoholic silver paint pen to paint bottom of each led. Do you know why?  To increase light in front direction. My moto: keep it simple.

Assembled!

Assembled!
White wires are AC12V from transformer. AC is converted in DC with Graetz diodes, full wave, After that is 8 lines of 4 LEDs ...voila!

Be light!

Be light!
Switch on! ...nothing burned...it works! Nothing is warm...even 4 Graetz-diodes (they are 1A) are cold.
Instead 2W I have output 12VX15mAX8=cca 1,5W... or so.. 
 
 

And light is on!

And light is on!
I put on back(glued) 6mm sponge. (roll sponge for laying on pool...). YOU can put a tape. Or card paper. Or something else --- what you like. Just for better look and some protection. And
of course: WARNING. Do this on own risk. Not mine.
 


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