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Anyone made a auto 4way/8way switching joystick?

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ranma:

--- Quote from: DaOld Man on September 09, 2010, 11:36:45 am ---
--- Quote from: ranma on September 08, 2010, 11:44:59 pm ---yes, it's a servo, someone asked what was used on the example on this thread and that's what I've used. Driving a servo is very easy, using just a 555 and this allowed me to control both servo positions with a simple scroll lock on and off positions.

--- End quote ---

Got a schematic or wiring diagram?

--- End quote ---

I don't have the diagrams at hand or the page I used, but if you search, there are lots of places where you can find similar circuits using a 555 in astable configuration and a transistor on the output to invert the signal, it's the same astable circuit you find on the 555 Datasheet, just search "servo 555".

As for your comment Randy, I really think that these Sanwa joysticks I've got are really hard to turn from the joystick, there is almost no friction. I know that they turn slowly if you play a lot, but you have to play a long time. In any case, to solve the problem of the servo always trying to correct it's position and risking it to burn, I'm trying configurations where I send signals to the servo for 1 second every 5 seconds, or every 10 seconds or so... This way the servo can put the switch in the initial position and check every certain amount of time that the switch is in the correct position and correct if necessary. This assumes as I said before, that your joysticks keep their position and they are not turn easily from the joystick.

Sir Headless VII:
How much rotational force does a player exeret vs a servo? could you hold the plate in the desired position with a magnet?

Sir Headless VII:
ok i thought of a much more complicated but more interesting way. The idea would be to have the servo arm follow a track that would deposit the plate in place then detach the arm (thereby eliminating the stress from a moving plate). The idea is roughly outlined below (only one side of the track is illustrated but it would obviously be mirrored on the other side).



The arm would rotate around the track with the plate attached via a magnet. When it reaches the area where the plate should be there is a stopper which detaches the plate from the arm. The plate falls onto a peg which fits into a hole on the plate and holds it in place. On the way back the arm would come over the plate and pick it back up with the magnet and travel to the other position where a similar thing would happen. It is fairly complicated and would be difficult for someone at home to build but it was what i thought about in the shower and that is what i came up with.

Derrick Renaud:
Couple of ideas.

A small solenoid to lock the rotation of the restrictor.  Solenoid pin just goes in/out of a hole in the plate.

Maybe use a motor with a worm gear to rotate the restrictor.  Then use an optical sensor to know when it is done, which then tells the previously mentioned solenoid to lock the plate.  Obviously this means a custom made restrictor plate that matches the gear on the motor.

It would be cool if the 4-way could rotate to a Q-Bert setting.  You would still have to setup the MAME buttons as the diagonals (eg. Up + Right,) but at least you would have the restriction.

D.

BadMouth:
If anyone just wants to spend $$$ and get it over with:
http://store.firgelli.com/l12-s-linear-actuat12.html
(mini actuator, built in limit switches, $80 +S&H)

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