electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » Wanted, For Sale, Opportunites and Requests » Parts and Components
Looking for specific analog joystick
Post new topic   Reply to topic Moderators: Scott Stites, Uncle Krunkus
Page 1 of 1 [10 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Tue Aug 16, 2011 11:36 am    Post subject: Looking for specific analog joystick
Subject description: would somebody knows where i could find 4 axis joysticks ?
Reply with quote  Mark this post and the followings unread

Hi !
I'm looking for buying joysticks which could have the hability to control four different pots, one per axis.

It seems to be really difficult to find, but it seems to exist, and we can find schematics with this kind of joysticks sometimes...

If someone has an idea, a website... or these joysticks at home... well, thanks for sharing me the information !

_________________
http://h.a.k.free.fr/

www.electroncanon.org
Back to top
View user's profile Send private message
Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Wed Aug 17, 2011 5:11 pm    Post subject: 4 axis??? Reply with quote  Mark this post and the followings unread

I'm looking for buying joysticks which could have the hability to control four different pots, one per axis.

I'm a little confused.

There's an X axis (side to side) and Y axis (up and down).
You could have a Z axis (rotate the stick CW or CCW)

What do see as the 4th axis?

Gary
Back to top
View user's profile Send private message Send e-mail
jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Wed Aug 17, 2011 9:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

it would be a joystick with two pots for x and two pots for y ??

Look after the schematic you can find there : http://yusynth.net/archives/WirelessWorld/Chatterbox-1976.pdf
how would you wire the four pots from the two formant filter in the upper rght of the schéma ( page 5 or 6)

thanks !!

_________________
http://h.a.k.free.fr/

www.electroncanon.org
Back to top
View user's profile Send private message
Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Aug 18, 2011 6:52 am    Post subject: Reply with quote  Mark this post and the followings unread

Ah - I think I know what you want now.

I did search and couldn't find the dual pot type of joysticks at any of the vendors I use. I have seen them from time to time though, so I know they do exist.

One alternative approach (and it would take some work) would be to change the design a bit. You could substitute vactrols for the pots in the schematic. You could then drive the vactrols (two for each axis) with the joystick, Scott Deyo at www.bridechamber.com does sell some nice vactrols, and they aren't terribly expensive.

Another alternative would be to substitute digital pots for the pots in the schematic. You could then drive those with an Arduino processor. Let the Arduino read the real joystick pots, and then change the resistors under program control. I'm not sure how fast the system could respond to that though.

A third alternative is to find a joystick (and this would really require some DIY magic on your part), and replace the single pots it has on it with dual pot clusters. If you could do that, that would be the most cost effective solution.

I wish I could be of more help on this...

Gary
Back to top
View user's profile Send private message Send e-mail
jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Thu Aug 18, 2011 8:13 am    Post subject: Reply with quote  Mark this post and the followings unread

yeah, thanks !! so many thanks !

lots of ideas, that's cool, so i gonna think about all this ! I also thought to change joysticks' pots for dual ones, but.. i need to find dual pots which could fit.

Your first idea seems to be really interesting, but i don't rellay see how to build that. Embarassed i'm a beginner in this kind of design, normally, i play with cmos ... not so analogish stuff.

so, let's go on it.

And... if i can't do / build what you purpose, i'll try with two small joysticks.. we'll see if it's playable or not !

thanks !

_________________
http://h.a.k.free.fr/

www.electroncanon.org
Back to top
View user's profile Send private message
Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Aug 18, 2011 8:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Your first idea seems to be really interesting, but i don't rellay see how to build that.

Well, a vactrol is a very simple device. It has two parts: A resistor that is sensative to light, and a light source.

When you change the voltage going to the light source, the light changes brightness, and that in turn changes the resistance of the other part.

So I think you would just have to wire the resistance elements in place of the pots in the schematic, and use an op-amp to drive the light sources. I'm not expert on it, but I'm sure there are people here that could give you a good start...

You could also just buy a vactrol and play around with it. Things like that can lead to a lot of good ideas.

Good luck

Gary
Back to top
View user's profile Send private message Send e-mail
jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Thu Aug 18, 2011 8:30 am    Post subject: Reply with quote  Mark this post and the followings unread

yeah, thanks;

sorry, i was wondering how to use 4 vactrols with a dual axis joystick.

i need to think in an another way...

thanks, anyway !!! you gave me great ideas !

_________________
http://h.a.k.free.fr/

www.electroncanon.org
Back to top
View user's profile Send private message
Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Aug 18, 2011 8:36 am    Post subject: Reply with quote  Mark this post and the followings unread

AH - I was under the impression that the pots moved in pairs.

If thats the case you would just have to have a driver circuit for X, and another for Y. The X driver output would go to two vactrols, and the Y driver would connect to the other ones...
Back to top
View user's profile Send private message Send e-mail
jean bender



Joined: Feb 21, 2010
Posts: 133
Location: france

PostPosted: Wed Sep 07, 2011 9:02 am    Post subject: Reply with quote  Mark this post and the followings unread

Yap, they move in pair...
i should try to find some jyosticks which can accept dual gang pots ( stereos), it would be perfect...

thanks for your help !

_________________
http://h.a.k.free.fr/

www.electroncanon.org
Back to top
View user's profile Send private message
rosch



Joined: Oct 03, 2009
Posts: 162
Location: germany

PostPosted: Thu Sep 08, 2011 8:55 am    Post subject: Reply with quote  Mark this post and the followings unread

the ones i know can take mono or stereo, as the pots are mounted on the outside. might be required to mess around with pot housings or finding a solution to attach them.
also the joysticks are quite different, but i just know the ones i have found (ebay):


DSC09931.JPG
 Description:
 Filesize:  143.65 KB
 Viewed:  81 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

DSC09931.JPG



DSC09932.JPG
 Description:
 Filesize:  135.13 KB
 Viewed:  85 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

DSC09932.JPG


Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites, Uncle Krunkus
Page 1 of 1 [10 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » Wanted, For Sale, Opportunites and Requests » Parts and Components
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use