Pages: [1]   Go Down
Author Topic: Driving RC Car with Sip & Puff  (Read 1007 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I'm a Quadriplegic can't move from neck down I use Sip N Puff controls to drive my wheelchair I blow air into a straw hard blow it goes forward, hard sip it goes back, soft sip goes left, & soft puff goes right, I've always wondered if it was possible to fix something up to drive an RC car, do you know of anything or have you ever herd of anybody doing this?

I have everything I need I have the RC truck and I bought the Invare ECU that hooks up to my wheelchair sip & puff I just need somebody to wire a 9-pin cable to the remote control that hooks into the ECU box the cable is Industry standard on the pins:
1 = forward; 2 = reverse; 3 = left and 4 = right. Pin 8 is common. . I had a guy working on that I meet on an RC forum but I don't know if something happened or what I haven't  herd from him in over a month. Here's what he was trying to do this was some of his post if it helps.

I do have the tools and skill set to build this cable but doubt it could be wired into the controller without an interface board.

I have the information I need to write the controller interface code and I have the parts to build it. The build is easy, 3 IC's and some caps on a proto board. The last bit of information changed how I was coding the interface. I'm still not to sure on the signals provided from the ECU but I can do the coding without that

Yes it has been difficult but we have made good progress. I have prototyped the interface circuit and have test code running. Since this is controlled by software it can be used by other interfaces. Do you have a need for something like this?

That's where I'm at does anybody think an Arduino board could work?
I also had someone recommend a hardware type setup to control the remote control.

Scott
Logged

UK
Offline Offline
Shannon Member
****
Karma: 184
Posts: 11197
-
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Having an RC hobbyist on the project really sounds essential. It sounds as if you're going to need somebody to physically build and connect this system so obviously it would need to be somebody local to you. Are you in contact with any local model clubs? I would bet there are people nearby with the skills you need and willing to help you. Over the internet it's hard to do more than offer advice and encouragement, and that won't take you far.

I understand that you have a 'sip/puff' interface that generates some DC output for the four possible inputs conditions. You don't mentioned the voltage/current characteristics of those outputs and you would need to know that to interface it to anything.

Have you figured out what sort of radio link you'd be using between you and the model? What sort of range/speed are you envisaging?

Have you figured out the details of how the sip/puff inputs would relate to speed and steering? I imagine the vehicle will need to keep moving while it steers so perhaps you want to be able to set the speed and have the model continue until you tell it to stop - but perhaps you have a different scheme in mind.
Logged

I only provide help via the forum - please do not contact me for private consultancy.

SW Scotland
Offline Offline
Edison Member
*
Karma: 13
Posts: 1326
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

If you also want actual hands-n help with this project we nee da rough idea of where you live.  If within the UK then you might want to contact REMAP.  They/we offer a totally free service in all manners of technical aids and assistance for "special" projects.
www.remap.org.uk
jack
Logged

Topsham, Vermont USA
Offline Offline
Edison Member
*
Karma: 24
Posts: 1766
... in The Woods In Vermont
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi Scott,

I worked with sip-puff for Morse code decode years ago. You must have something similar to use the web.

I think many modern sip-puff units use small pressure sensors with a analog output. Maybe you could run one of these to an Arduino analog inputs and then have a variety of responses. Maybe puff pressure controls speed?

Do you have any other eyebrow/blink sensors?  Maybe you could end up with direction and speed and really run a car all over..

Let me know if you want an Arduino starter kit to play with; I'll send you one if you'll document online what worked for you. I'd like other people with similar limitations to see this stuff...

PM or email terry@yourduino.com
Logged

Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Tucson, AZ
Offline Offline
Sr. Member
****
Karma: 4
Posts: 272
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi Scott,

I worked with sip-puff for Morse code decode years ago. You must have something similar to use the web.

I think many modern sip-puff units use small pressure sensors with a analog output. Maybe you could run one of these to an Arduino analog inputs and then have a variety of responses. Maybe puff pressure controls speed?

Do you have any other eyebrow/blink sensors?  Maybe you could end up with direction and speed and really run a car all over..

Let me know if you want an Arduino starter kit to play with; I'll send you one if you'll document online what worked for you. I'd like other people with similar limitations to see this stuff...

PM or email terry@yourduino.com


No that is a most generous offer.  Makes me glad that I support your business.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Sorry it's taken me a year to respond. I've just started thinking about my project again and some other inquiries I had out didn't pan out. Thanks for the offer I might take you up on it just don't know how complicating it would be. I'll put some messages out to some local RC clubs.
Scott
Logged

the land of sun+snow
Offline Offline
Faraday Member
**
Karma: 149
Posts: 2790
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi scottl523, I just noticed this thread for the first time. It would still help to know where
abouts you live. I was wondering how you create emails. I don't know if this idea would be
useful, but if you can enter in S,F,B,L,R characters using a form of Morse code as Terry
mentioned, you can control robot movement by sending the characters to an Arduino via
RS232. This is how I've initially controlled all of my robots. Incorrect characters are simply
ignored, and have no effect.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I live in Georgia U.S. Here's what I use to do the computer http://www.naturalpoint.com/smartnav/ but I have a sip & puff switches for the mouse click. To type I just bring up a onscreen keyboard.
Logged

the land of sun+snow
Offline Offline
Faraday Member
**
Karma: 149
Posts: 2790
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

I still think you might try controlling the car using characters entered on the onscreen
keyboard, as that seems to be easier than changing the sip'n'puff device between
wheelchair control and car control. Call up a terminal emulator that allows the PC to
talk to an Arduino in the car via XBee/etc, and enter S,F,B,L,R, etc. Also, a way to
command the Arduino to do anything in general.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Here is what a guy from AsTeRICS (Assistive Technology Rapid Integration & Construction Set) told me.

My thoughts about your setup:

 

I assume you get binary signals on the wires forward, reverse, left and right.

The problem with digital signals for the steering is,  that it’s very difficult to get a real sensitive control, but just cruising around should be no problem.

 

The next problem with digital signals is that you can’t just solder them to the remote directly. You would need a microcontroller to translate your control commands – Arduino would be perfect.

 

I can suggest the following two setups:

 

1)

First of all you need a radio transmitter with a trainer jack (http://en.wikipedia.org/wiki/Buddy_box). These are used to connect the remote of a trainer and a beginner to practice driving, flying or whatever. In our system we hook up the Arduino to the trainer jack and get the possibility to send steering commands to the transmitter which then sends the appropriate radio signal to the model. The communication between the Arduino and the remote is done via a PPM signal. Attached you find some code for the Arduino to generate such a signal but you would need somebody who adjusts it to your needs. Maybe you have a RC hobby club around your home, normally you can find very interested people there who are into electronics and share their passion for RC cars or RC models with you.

 

Pinout for the Arduino for the ppm generator:

Connect pin 12 with the ppm in of the trainer jack

Connect GND from the Arduino to the GND pin of the trainer jack

Connect your signals to digital inputs and connect GND  of the Arduino and the 9 pin cable.

 

Read the buttons state and set the channels in  the Arduino loop method according to your inputs

The code should be very easy to write and also people with low programming experience should be able to be successful.

 

 

2)

The second (easiest) option would be to get a remote with two joysticks, take one joystick out of the radio and mount it to your chin. We used soft balls from wheelchair chin controls which we glued on the stick to make the steering more comfortable, but I don’t know if this would be an option for you.

 

I hope I could help you, and if you have further questions just drop another email.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Anybody have any ideas about that do you know if it will work?
Logged

UK
Offline Offline
Shannon Member
****
Karma: 184
Posts: 11197
-
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

The 'trainer' approach seems like the easiest way to get your Arduino-generated control signals onto the RC transmitter.

I have no idea which user interface mechanism would work best for you and I don't see how anyone else could know, unless they happened to have experience of your disability.
Logged

I only provide help via the forum - please do not contact me for private consultancy.

Pages: [1]   Go Up
Jump to: