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Turnigy 9x Hacks

The Turnigy 9x is a really useful little transmitter from Hobbyking. It appears to be a copy of a copy of a good one, but it's cheap and damn nice for a starter.

You can pick them up here, and spare recievers here. At the time of writing it's about $60 for a Tx and $9 for an Rx, not including shipping. Apparently the later firmware will also bind to cheap hobbyking receivers too. I've tested it on my models, but don't quote me on that. 

This page is mostly as a bookmark for myself so I can remember useful settings.

Adding on the LED backlight. 

$5 in parts, half an hour time. Totally worth it. 

Muffling the Buzzer inside. 

There are software fixes to add functionality and give you a mute option, but they're quite time consuming. I decided to hot glue the piezo. 
If you open the cover and remove the centre board, underneath is the piezo buzzer. A dab of hot melt glue on top quietens it enough to avoid being irritating, but still let you know when the battery's flat. 

Understanding the modes:

Before setting up the custom mixes on the radio, you have to decide what 'mode' your radio is in. For historial reasons, and because people like using different setups for helicopters to cars to aircraft, there are a few options.

The purpose of each control, if you get them easily confused like I do:
  • Throttle - More makes you go faster, as you might expect. 
  • Elevator - Controls how much an aircraft veers up and down. If you do a loop-de-loop, this is what you yank back on.
  • Ailerons - Controls how much an aircraft rolls from side to side. 
  • Rudder - Steers an aircraft in the horizontal plane. Located at the back. Typically not used by itself when in the air, but as a method of trimming the ailerons, and in coordinated turns. 
Mode 1: Left stick has the elevator on the vertical and rudder on the horizontal. Right stick has throttle on the vertical and ailerons on the horizontal. 
Mode 2: Left stick has the throttle on the vertical and rudder on the horizontal. Right stick has elevator on the vertical and ailerons on the horizontal. 
Mode 3: Left stick has the elevator on the vertical and ailerons on the horizontal. Right stick has throttle on the vertical and rudder on the horizontal. 
Mode 4: Left stick has the throttle on the vertical and ailerons on the horizontal. Right stick has elevator on the vertical and rudder on the horizontal. 

Your throttle should be the stick without a spring return on it. If your throttle is on the right, then you should fly either mode 1 or 3, and if your throttle is on the left, then you should fly either mode 2 or 4. 

Mixes for Tank (differential) steering:


The turnigy is capable of automatically mixing for a tank-like robot (differentitial steering), but it's a bit tricky to figure out how 
  • Use AUX1 & AUX2 for the outputs to the left and right motor. 
  • Use the 'PROG MIX' and set up the following mixes. 
    • MIX1: ACT, THR, AUX(1), 0, -100, -100, ON
    • MIX2: ACT, THR, AUX(2), 0, -100, -100, ON
    • MIX3: ACT, AIL, AUX(1), 0, -100, -100, ON
    • MIX4: ACT, AIL, AUX(2), 100,100, ON. 

Mixes for V-tail aeroplane:

Use 

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