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« on: February 16, 2014, 04:34:43 PM »
pratap
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you can create your own backlight for any transmitter
the cost of this project is less then 50rs but little time consuming,if you got some spare time you can DIY it in less then 2hrs
lets do this Smiley

Materials:
1) acrylic sheet 4mm (size is depending on your Tx screen in my case 88mm*43mm) turnigy 9x
2)RGB led strip
3) some thin wires 2mm
4)dip switch
5)sand paper for sanding acrylic surface
6)some tools
DSC01009_800x600.jpg
DIY your own RGB backlight
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« Reply #1 on: February 16, 2014, 04:40:14 PM »
pratap
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measure the size of your TX screen and cut the acrylic sheet to suit your tx screen size
after cutting sand out any rough surfaces
remove one side of the protective film of acrylic
DSC01010_800x600.jpg
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« Reply #2 on: February 16, 2014, 04:47:17 PM »
pratap
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the HK backlight is of straight acrylic with side leds and bottom reflective surface
but the drawback of this is lot of light pass through the sides
so you need an angled surface to reflect the light towards the screen
below pics explains a lot
DSC01862_800x600.jpg
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« Reply #3 on: February 16, 2014, 04:55:42 PM »
pratap
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start sanding one side of the acrylic surface
it can be easily done by rubbing the surface againest a rough surface and later sand with sand paper
the sanding should be done as shown in the pics
DSC01012_800x600.jpg
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« Reply #4 on: February 16, 2014, 05:01:32 PM »
pratap
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after sanding prep the led strip for soldering
many of the led strips works on 12v supply and no need of external resistance to limit the current
cut a section of led strip that consists of three RGB leds and three resistors
cut the individual leds and resistors of the section
DSC01021_800x600.jpg
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« Reply #5 on: February 16, 2014, 05:05:47 PM »
pratap
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stick the leds to the thick side of the acrylic in same orientation using CA (feviquick)
DSC01018_800x600.jpg
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« Reply #6 on: February 16, 2014, 05:11:23 PM »
pratap
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start soldering resistors to the leds
you can check the position of resistors and connections using other section of led strip
DSC01863_800x600.jpg
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« Reply #7 on: February 16, 2014, 05:16:09 PM »
pratap
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you should solder using a low wattage soldering iron
mine is 25w and the leds cant withstand such heat
after messing lot of leds the final soldering is
 
DSC01029_800x600.jpg
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« Reply #8 on: February 16, 2014, 05:21:36 PM »
pratap
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after checking the working condition of the leds you can connect the wires
solder some dark wire for the positive and light one for the negative
after that end up with with 4 connectors one for positive three for negative
DSC01027_800x600.jpg
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« Reply #9 on: February 16, 2014, 05:24:23 PM »
pratap
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some colors using different combinations of the three negative wires
 
DSC01030_800x600.jpg
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« Reply #10 on: February 16, 2014, 05:26:11 PM »
pratap
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some more
DSC01034_800x600.jpg
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« Reply #11 on: February 16, 2014, 05:28:52 PM »
pratap
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now the transmitter part
carefully open the tx back cover
DSC01039_800x600.jpg
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« Reply #12 on: February 16, 2014, 05:39:52 PM »
pratap
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remove the main pcb and clean out the surface of the screen
secure the leds with some hot glue
remove the protective film of the acrylic and place the shiny side of the back light on the screen ( sanded side should face towards you)
DSC01044_800x600.jpg
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« Reply #13 on: February 16, 2014, 05:42:16 PM »
pratap
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gently remove the foam from the back of main pcb
DSC01045_800x600.jpg
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« Reply #14 on: February 16, 2014, 06:02:39 PM »
pratap
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place the reflective material on the back light
any thick white paper will do the job
place the main pcb on the back light and observe for the gap
if you see any space between main pcb and the back light place a thin foam sheet to fill out the gap
mine had no space for the foam so i fixed the main pcb directly
DSC01146_800x600.jpg
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« Reply #15 on: February 16, 2014, 06:10:51 PM »
pratap
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make sure that everything is working and check with external power
after that check for the positive and negative in the the TX
for my flysky 9x
DSC01140_800x600.jpg
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« Reply #16 on: February 16, 2014, 06:23:29 PM »
pratap
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connect the positive directly to the back light
you need 4 way dip switch to change the colors
place the dip switch on the tx wherever you need
i decided to place the switch near the antenna
DSC01843_800x600.jpg
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« Reply #17 on: February 16, 2014, 06:41:57 PM »
pratap
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drill a hole and pass the four wires through it
DSC01854_800x600.jpg
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« Reply #18 on: February 16, 2014, 06:53:51 PM »
girishsarwal
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DIYer
great work pratap
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« Reply #19 on: February 16, 2014, 07:00:00 PM »
pratap
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@girish thanks
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« Reply #20 on: February 16, 2014, 07:02:05 PM »
pratap
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bend the legs of dip switch and solder the four legs together
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« Reply #21 on: February 16, 2014, 07:05:27 PM »
vishal
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nice

if only i could patent my idea of a backlight  Roll Eyes

http://www.rcindia.org/radios-and-receivers/backlight-install-for-spektrum-dx7s/new/#new
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« Reply #22 on: February 16, 2014, 07:10:30 PM »
pratap
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@vishal started this project two months back and bit busy so couldn't post in the fourm Smiley
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« Reply #23 on: February 16, 2014, 07:13:48 PM »
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solder the four wires to the four unsoldered legs of the dip switch
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« Reply #24 on: February 16, 2014, 07:17:40 PM »
vishal
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i finished off mine more than a year ago  Grin

http://www.rcindia.org/radios-and-receivers/avionic-rcb7x-review/25/
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