HOW TO - Make a Spinner

Spinner
An Arkanoid spinner made with recycled parts . See here also for a detailed guide on how to build a startrek like pushbutton. Link.



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Posted by: IanGowen on August 30, 2006 at 10:23 AM

um, link?


Posted by: nataliezee on August 30, 2006 at 10:38 AM

link is up now. thanks!


Posted by: Axeman on August 30, 2006 at 11:01 AM

And please be patient if the connection is slow, it's because there are right now more than 300 users and my server is connected to a slow (256kbit) connection. :-)


Posted by: Oracle1729 on August 30, 2006 at 1:13 PM

Do you mean a paddle?


Posted by: Windell_Oskay on August 30, 2006 at 2:20 PM

>Do you mean a paddle?
The original video game Arkanoid had a heavy (high moment of inertia) rotary knob that you turned left or right to move your... Vaus.


Posted by: inkyblue2 on August 30, 2006 at 2:38 PM

spinner? how can i pimp my ride with this?


Posted by: Stokes on August 30, 2006 at 3:56 PM

Yeah, this isn't a paddle; paddles (like on the Apple II and Atari 2600) were potentiometers with limits to how far it would turn in either direction. This can be spun indefinitely in either direction. It's more like a trackball for moving in one dimension.

A bunch of games used to use them, including Arkanoid and Tempest. Didn't Discs of Tron also use a spinner, too?


Posted by: Oracle1729 on August 31, 2006 at 4:06 AM

The electronics term for this is rotary encoder. I think this example is an optical encoder but I haven't looked at the example.

Anyway the electronic device (encoder or pot) is separate from the application (video game paddle or volume knob).


Posted by: Stokes on August 31, 2006 at 6:27 AM

It's an optical quadrature encoder; it uses the guts of a mouse with the disc's encoding pattern laser-printed on a transparent sheet. Pretty clever, really...


Posted by: Axeman on September 1, 2006 at 12:01 AM

@Stokes: Yes, it's an optical quadrature encoder. And yes, Discs of Tron console had a spinner for the left hand and a joystick for the right hand.

@Oracle1729: Stokes is right. It's not a paddle. a paddle knob has a mechanically limited rotation range, a spinner knob rotates indefinitely. Moreover, this type of control is called "spinner" exactly by the companies who sell it.

@Windell_Oskay: Right. Arkanoid's spinner is actually "harder" than this one because of a gear train that makes the flywheel/sensor rotate much faster than the knob.

@inkyblue2: Yeah ... sure!! You can use this thing as a volume knob. Just find an amplifier that can increase indefinitely the volume :-)


Posted by: Axeman on September 1, 2006 at 12:03 AM

@Stokes: Yes, it's an optical quadrature encoder. And yes, Discs of Tron console had a spinner for the left hand and a joystick for the right hand.

@Oracle1729: Stokes is right. It's not a paddle. a paddle knob has a mechanically limited rotation range, a spinner knob rotates indefinitely. Moreover, this type of control is called "spinner" exactly by the companies who sell it.

@Windell_Oskay: Right. Arkanoid's spinner is actually "harder" than this one because of a gear train that makes the flywheel/sensor rotate much faster than the knob.

@inkyblue2: Yeah ... sure!! You can use this thing as a volume knob. Just find an amplifier that can increase indefinitely the volume :-)


Posted by: Zeppo on September 1, 2006 at 3:26 AM

How's the backspin on this thing?
By that I mean, if you spin it really fast, like in Tempest, does the object in the game start going backwards?
I know some spinners built from a computer harddrive motor can do that, but they use a much smaller encoder wheel usually.
If your works better, I might give that a try.

Good job.


Posted by: Axeman on September 1, 2006 at 5:28 AM

@Zeppo: It never happened to me. But I play Arkanoid, and not Tempest :-)
Anyway, the "backspin" problem occurs when the sensor (or the microcontroller) can't cope with the frequency of the "notches" that trigger the sensor. The issue could be avoided simply by printing a bigger disc and/or less "notches". My optical wheel is much bigger than the original mouse wheel and this problem shouldn't exists.


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