*** A better mod with EL panels instead of LED’s is available on this site, check related articles at the bottom of the page. ***
Another one of my favourite transmitters that doesn’t have a backlight. This should be standard these days. However, I just couldn’t live with it so I bought some LED’s and resistors and did my own mod. Please not that my FlySky 9x is using 7.4v. I modified it to run off a 7.4v li-ion pack. The stock transmitter uses 12v I believe so you’ll probably need a different resistor. I’m thinking about 390 ohms. You need to know the input voltage and use this LED/resistor calculator to figure out what you’ll need.
You’ll need about $5 worth of parts:
4x 3mm blue LED (3.3v, 20mA)
4x 220 ohm resistors (for other transmitters that use higher voltage, you’ll need a different resistor!)
Here’s the wiring diagram for the LED’s. If this is foreign to you then stop right here and don’t go any further
4 LED’s and 4 resistors
I used a piece of plexi-glass and sanded one side of it. I made notches where the LED’s were going to be hot glued.
I covered the back of it with white paper. Solder the LED array and hot glue it to the plexi-glass.
Cram it back into the transmitter.
Soldered the LED array to the contact points on the transmitter
It turned out well, it’s a lot brighter than my Spektrum DX6i.