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I am using my mini to pull a wheelchair

 

i will post pucs later but i made a plate with sclarge salid bowl that fits on the base and a fiberglass molded bearinf that fits pnto an extension of th chair

 

i currently control extension i clampvto knee control

 

i want to mod it so i can use a joy stick

 

anyone know details of the cintrol signals needed

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In another thread I asked a question on voltages of the stearing sensor, I got a reply that asked why I wanted to do it.  I tried to point them to this thread.

 

I looked up Hall Effect sensor Joy Sticks. it looks like they come in the same 2.5 volt center position range as standard.

I am thinking that this may be a simple conversion.

If I unplug the steering sensor, and forward and reverse sensor from the mother board, and plug in my joy stick, I think that I can make my mini work from a joy stick.

I can trace the steering sensor wires without  to much trouble.

Can anyone point me to the forward and reverse sensor?

 

From reading other discussions, I think that this would best be described as using it as a mule.

I am going to order a hall effect (affect?) joy stick and some connectors. Initially I will hard wire it.  I will also look at wireless joy sticks.  will see if there is a option to add on a wireless module.  If there is, I will pick it up.  If not, I will start with a wireless one.

I would consider disconnecting the sensor pads, so it does not think that anyone is on it, and using the blue tooth app, but I want more control than twhat I have on the iPhone.  It would be nice to use a joy stick with the app,. but I think that wiring it in may be a quicker mod.

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16 hours ago, Wilsonintexas said:

Can anyone point me to the forward and reverse sensor?

You do not have a single forward backward sensor
This works with a gyroscope and accelerometer (gravitometer)
Here, this is glued to the housing

GravitySensor.jpg.9027009ffe4b4c79bf1393e20ae1f084.jpg

 

For information from the Russian Forum an "LSM6DS3" is to be installed
http://www.st.com/content/ccc/resource/technical/document/datasheet/a3/f5/4f/ae/8e/44/41/d7/DM00133076.pdf/files/DM00133076.pdf/jcr:content/translations/en.DM00133076.pdf

 

Donald

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18 hours ago, Wilsonintexas said:

I looked up Hall Effect sensor Joy Sticks.

You can also use normal joysticks with potentiometers

Joystick.thumb.png.5f00c22ece8b487f29e45db3bfd74375.png

 

Donald

 

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Thank you, Donald. I am modifying a Ninebot miniPRO for a disabled friend and I am wondering where to connect a pot Joystick. Is it done unplugging the micro plug from the board of the of the steering Hall effect sensor and connecting the joystick wires to the micro plug instead? Please let me know.

 

Cheers from Bruno

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Yes, exactly

In my example, the two 6.8K ohm resistors are for a 4.7K ohm poti.
Now you need to open your joystick and find out the resistance of the internal potentiomer.
If you tell me this value I can calculate you the appropriate series resistance.

Greetings Donald

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On ‎19‎/‎11‎/‎2017 at 1:28 AM, donaldduck8 said:

Yes, exactly

In my example, the two 6.8K ohm resistors are for a 4.7K ohm poti.
Now you need to open your joystick and find out the resistance of the internal potentiomer.
If you tell me this value I can calculate you the appropriate series resistance.

Greetings Donald

I treid it and it works! Right and left turns are now by joystick. Would you know if it is possible to use the joystick for making the miniPro move forward and backward motion as well, so that with a neutral joystick position the mini pro would stand still, allowing a person to seat on the chair without moving forward or backward? I am thinking in terms of a servo control-like idea: the servo arms locks in position where ever the stick tells the servo to stay. Or if not, some kind of delay to allow the person to seat.   ????    Thank you in advance.

Cheers from Bruno

Edited by Bruno De Michelis

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On 28.11.2017 at 5:01 AM, Bruno De Michelis said:

Would you know if it is possible to use the joystick for making the miniPro move forward and backward motion as well, so that with a neutral joystick position the mini pro would stand still, allowing a person to seat on the chair without moving forward or backward?

No, unfortunately that is not possible.
Forward and reverse is done by regulating the position using the gyroscope and accelerometer (LSM6DS3).
This IC is located on the motherboard labeled U9 (and not in the frame as I had described above)

The only way I think is the manipulation of I2C communication between U9 and main processor.
MainBoard1.jpg.104c568c54987876321a4573061fddfa.jpg

Do you want to build such a wheelchair?
Seat1.jpg.703bcb5eb1c02b5e681c1722010bb6bb.jpgSeat2.jpg.a49026e86406caf5746f23f430f8a2e0.jpg
 

http://www.funshop.at/produkt/nino-rollstuhl-weiss-blau/

There is no need for a joystick for forward and reverse, all by shifting your weight.



Greetings Donald

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Thank you again. The reason for trying to use a joystick is that the person who is going to use the wheelchair is physically disabled and I doubt he will be able to control the wheelchair by weight shift.

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I understand that a joy stock for forward and reverse will not work.

 

but

 

you can use the blue tooth and iPhone to control it if no one is on it.

 

and

 

there are blue tooth joy sticks that connect to the iPhone. 

 

has anyone had luck using the blue tooth mode to connect a joy stick?  (I will be using it as a mule, so am willing to disconnect the sensors that jus=dge weight, and limit iPhone control) 

 

Does anyone know what it would take to develop an app that would look like an iPhone to the ninebot but be able to use a blue tooth joy stick? 

 

 

 

 

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