G940 Pedal - Pot Wiring Sequence / Question

[SeaW0lf]

Hello folks, does anyone know the order of the G940 pedal pot wires? I bought these hall sensors, referred here, and now I just have to test it. I could buy a multimeter, but I will probably never use it again and it will take time to learn how to use it.

 

The left image is the G940 pot in place. The two images on the right is of the new hall sensors. The datasheed is at the DigiKey website.
 

 

From what I have been researching, the black wire (left image) would be the ground, the brown wire the Vout and the yellow wire the + 5V. The red wire is not connected to the pot. It goes somewhere else.  

 

Would anyone who modded the G940 confirm it?

 

After testing it, I already have a way to adapt the sensor bay. It doesn't seem too difficult and I'm not going to cut much of anything, just the fit for the pot at the base of the pedal. If everything goes right, I’ll post photos.

 

I would appreciate any help. The pot is getting close to its demise and I tried all the tricks people learned over the years to recover them.

Edited March 8, 2021 by SeaW0lf

[Sokol1]

https://forums.eagle.ru/topic/140898-g940-pedals-to-usb/?tab=comments#comment-4562153

 

Although potentiometer is not damaged by invert Pwr and Gnd - just result in axis inversion

with hall Sensor this burn the sensor, so by sure before connect wires.

 

Other detail to investigate, this Hall Sensor work with 5v, I think that Logitech use 3.5v in their controllers - an way for mask noise of the cheap pot used.

 

If is the case -and you need a multimeter for check, an solution is use an cheap (<$5) Arduino PRO Micro flshed with MMjoy2 frmware and make the pedal a standalone controller.

Edited March 8, 2021 by Sokol1

[SeaW0lf]

12 hours ago, Sokol1 said:

If is the case -and you need a multimeter for check, an solution is use an cheap (<$5) Arduino PRO Micro flshed with MMjoy2 frmware and make the pedal a standalone controller.

 

Thanks for the reply. I don't mind losing the sensor, so I might try to test it. I find it to be very unlikely that the +5V is the black wire. In case it does not work, do you know of any tutorial to make it a standalone controller? These arduino mods are alien to me.

[Sokol1]

With a LED and an resistor make a tester, the LED will lit if current flow in correct direction, so you are able do determine the wires polarity.

 

The voltage issue is that Bi-Tech 6120 series requires 

4.5 to 5.5 Vdc

 

If Logitech G940 circuit use 3.5v for axes the sensor will no work.

 

An workaround is take +5v from G940 USB cable, before the circuit board,

but in this case is need a resistor in sensor output for drop the voltage for 3.3v before going to circuit board.

 

This is explained there (Google translate OK) - for Saitek X-45, that too use 3.5 volts circuit.

https://sfw.so/1149033286-ustanovka-datchikov-holla-v-dzhoystik.html

[SeaW0lf]

1 hour ago, Sokol1 said:

With a LED and an resistor make a tester, the LED will lit if current flow in correct direction, so you are able do determine the wires polarity.

 

The voltage issue is that Bi-Tech 6120 series requires 

4.5 to 5.5 Vdc

 

If Logitech G940 circuit use 3.5v for axes the sensor will no work.

 

An workaround is take +5v from G940 USB cable, before the circuit board,

but in this case is need a resistor in sensor output for drop the voltage for 3.3v before going to circuit board.

 

This is explained there (Google translate OK) - for Saitek X-45, that too use 3.5 volts circuit.

https://sfw.so/1149033286-ustanovka-datchikov-holla-v-dzhoystik.html

 

Thanks a lot, I'll see what I can do!

 

Cheers,

[jib2]

Black is the common ground

Here is a diagram:

https://images.app.goo.gl/WRxi7FewiobTRSxz6

 

I have only rewired the peddles using a BU0836A board:

 

https://forums.eagle.ru/topic/101213-g940-pedalspedal-cable/?do=findComment&comment=2372025

 

Why are you changing the pots? Are the old ones broken or are you trying to get more accuracy?

 

You can get a multi meter for £5. They are super useful to have around!

 

[SeaW0lf]

On 3/12/2021 at 10:48 AM, jib2 said:

Black is the common ground

Here is a diagram:

https://images.app.goo.gl/WRxi7FewiobTRSxz6

 

I have only rewired the peddles using a BU0836A board:

 

https://forums.eagle.ru/topic/101213-g940-pedalspedal-cable/?do=findComment&comment=2372025

 

Why are you changing the pots? Are the old ones broken or are you trying to get more accuracy?

 

You can get a multi meter for £5. They are super useful to have around!

 

 

Cool, thanks, that's what I imagined.

I'm changing the pot because the original one is at the end of its life. I have tried all the procedures suggested by G940 owners and it helped in the past, but by now I'm having spikes especially on the left turn. It turns into a gamble to go for a bounce or work as a Boom and Zoomer. I can't align the guns in downward turns. My aim is all over the place. In some planes (WWI) is not that bad, but in others like the Dr.1, which has a nasty left turn, it is hard to deal with it.

 

And nothing beats a hall sensor.

 

I'll check it out, but so far, over the years, I have never found out a post showing the wiring on those arduinos. Like “how to wire your mod for dummies”. I have checked several posts and videos about arduinos, but people talk to an audience that is already modding for years. For who wants to start, at least to me, is like learning to speak Chinese.

 

If the G940 voltage is 3.5V and I have to make an arduino mod for the hall sensor, and if I’m able to finish it, I’ll make sure to make a detailed tutorial for everyone who has a G940 to be able to mod it with a hall sensor. FFB is essential, it has good hall sensors on the joystick and a decent throttle (got used to it). G940 owners are all over the place. I saw a bunch at the MSFS forum.    
 

Edited March 13, 2021 by SeaW0lf

[Sokol1]

In the linked post I write how flash MMjoy2 firmware in Teensy 2.0 - for an (<$5) Arduino PRO Micro is the same, the difference is that PRO Micro don't have an reset button of Teensy, is need short two pins for the same effect.

 

Once flashed set in MMjoySetup that will use 3 axes, and what pins will use for this axes.

 

 

This video show the procedure at 1:20.

 

Spoiler

 

Now, wiring the sensor in Arduino is simple, solder the PWR (+5v) and GND cables, plus one for each pot (3).

PWR and GND can be shared with all the used sensor, pot.

 

MMJoy2 - gravação do firmware.zip

Edited March 13, 2021 by Sokol1

[SeaW0lf]

18 hours ago, Sokol1 said:

In the linked post I write how flash MMjoy2 firmware in Teensy 2.0 - for an (<$5) Arduino PRO Micro is the same, the difference is that PRO Micro don't have an reset button of Teensy, is need short two pins for the same effect.

 

Once flashed set in MMjoySetup that will use 3 axes, and what pins will use for this axes.

 

 

This video show the procedure at 1:20.

 

  Reveal hidden contents

 

Now, wiring the sensor in Arduino is simple, solder the PWR (+5v) and GND cables, plus one for each pot (3).

PWR and GND can be shared with all the used sensor, pot.

 

Thanks, I'll take a look!