what do you want the 3rd channel button to do exactly?

Hi, I'm trying to flash my GT3C, but I'm stuck at when I connect the 4 pins to the radio. My computer plays the sound that a USB device has disconnected, which of course is the STM programmer, and then my radio lights up and beeps each second.

I've tried to reverse the pins but I get the same result.

If I try to flash while I'm holding the pins in the socket I get this message:

Error : Cannot communicate with the board.
Wrong board selection or check board power supply or check that a previous session is closed.
Error : < PROGRAM MEMORY programming failed.


So my big question is, is it supposed to "disconnect" from the computer when you plug it in the radio?

Is it supposed to beep continuously?

EDIT!

So, this didn't show up in the pdf guide, but on a youtube video. I have to de-solder the two SB1 and SB2 SMD resistors :)

Works fine now.

Ch 3
 

Hello all,
I need a bit of help. I had my GT3b hacked, using 6.1 firmware. i've never used more than 2 channels.

I need to use Ch.3 as an AUX channel now. I installed a Telebee r/c gyro onto my 2 wd Slash-it has an extra yellow wire that goes into Ch3.

My belief is that this allows the gyro to be adjusted remotely/turned off when not needed using dual rate from the radio system (instead of adjusting only on gyro itself)

Nothing happens when i click in CH3 button, or ch3 trim on my radio. Tried swapping connector on receiver(only has a yellow wire-dont know which side this is supposed to go on)

How do I set up my hacked GT3b to have a useable ch3 AUX button? It has something to do with setups, but I'm clueless to how this is done.

Thanks!

Ps: here's the telebee manual:
http://www.telebee.com.hk/Download/R...ANUAL%20R1.pdf

The manual says that it can operate in single rate mode (only 1 setting, always on) or dual-rate mode (One setting when CH3 inactive, alternate setting when CH3 active) if you connect the plug. It does not mention how to connect it or how to set what the 2 rates are. To test your CH3 working properly, just plug your steering servo into CH3 and activate the CH3 button on the remote to see if it makes the steering servo do something. If it does, then you need to contact the gyro manufacturer on how to set it up properly with the Dual-Rate setting.

Thanks for the reply. Already sent Telebee a msg. to get an official response, but I did figure out how i could adjust the sensitivity using the ch3 trim button.

I'd like to be able to deactivate the gyro using CH3 button, to use it when I need it.

Can ch3 button just be on/off switch for ch3? if so, what should my settings be?

I would assume that you could set dual-rate to be 0%\100% if it allows that option, or when the manufacturer gets back to you on how to configure it properly.

First, thanks for all the cool tech info here, thought I'd add back, hope not a duplicate.

I got the Turnigy GTX3 (Flysky GT2B clone) and the expo works fine, and while I will replace the VR as per in this thread, I first tried to used a $5 DC-DC step up converter regulator to run a 2S1P LiFe RX pack in the transmitter, and it works great!

I took out the 8 cell AA holder, and there is plenty of room for the DC-DC converter and a 1450 Mah LiFe battery. I set the regulator output to 9.2V, which it holds steady as the battery goes down (but LiFe have a pretty flat curve anyway), and I think the low voltage prevents the stock VR from overheating or being too inefficient. Regulator handles input from 3V to 34V and up to 2.5 amps. The GTX3 amp draw is below 0.2 amps.

I.e., light long lasting battery, charge same as the LiFe 6.6V used in your car. I've had everything turned on for 4 hours, and LiFe voltage has dropped from 6.7V to 6.54 volts, while the TX voltage stays solid at 9.2V whole time. Battery, converter and TX screen in VR are all cool, no sign of heat anywhere.

I used the "LM2577 DC-DC Adjustable Step-up Power Converter Module" from Amazon, $5, lol.

Note, if you try this, first use a voltmeter to set the DC output close to 9.5 volts BEFORE hooking it up to TX, mine arrived set at 18 Volts.

Adding a Potentiometer to GT3B
 

Has there been any progress for adding a potentiometer to the GT3B? I've been searching and searching.

Any potentiometer specs, pictures and or instructions would be cool.

Thanks!

Scaled Down Steering with more Throttle
 

I would like to try to have a setup for fast cars that would reduce the steering output based on throttle level. Basically the faster the car goes the less steering and finer control from the steering wheel on the transmitter. I like all the new features I have with the firmware but I'm not sure how to achieve this. I don't do DIG or 4WS so I haven't done those complex setups. If anyone has something similar or can give me the basic setup idea that would be helpful.

Thanks,

I have an LED kit installed on Ch3 of my Rx. With the new firmware, will I be able to map the Ch3 button to turn them on & off?

If you put a led controller on it will. The receiver always has power so without some kind of switch, your lights will always be on.

Yes I ordered one of these:
https://www.hobbyking.com/hobbyking/...dProduct=65949

Do I need to do any special mapping in order to get the Ch3 button to do what I want, or will it work as is?

You will have to program it as an on/off. I can't follow the programming of mine so I just use templates from other people. Maybe try Googling programming gt3b to turn lights on and off, or something similar. You could also try here: http://www.rccrawler.com/forum/elect...er-thread.html Someone over there with a better understanding of the programming might be willing to help.

Thanks. I found this guide but it really isn't very intuitive.

http://rc.305.cz/storage/FS-GT3BC%20PSX%20Manual.pdf

New question: I hacked my GT3B with 0.6.1 firmware, but now I can only adjust the steering endpoints in one direction, to the right. When I turn the steering wheel, it doesn't change which way the arrow is pointing. Anybody else experience this?