[Techtoolslist] Kurz Kasch test fixture cards on eBay

[Matthew Rossiter]

You're right, there are two circuits for controlling the x and y axis.  I didn't articulate that very well.   I'll look at my missile command or football cards to see if I can trace them out.   Right now I'm using a 3" trackball but it requires a lot of spin to move the players!

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> On Feb 18, 2015, at 9:30 PM, John Robertson <jrr at flippers.com> wrote:
> 
>> On 02/18/2015 7:02 PM, Matthew Rossiter wrote:
>> I bought a set for Atari Tank only to find out I already have it. :)
>> 
>> I notice Kurz Kasch never made a set of cards for Atari Basketball AFAIK so I made a pretty nice little rig using a variac to control the input voltage.   I just need to make a simple 555 timer - duty cycle circuit like they have to mimic the trackball in other games so that I don't have to hunt down a 4.5 inch trackball.  Anybody got a schematic I can use?
>> 
>> Matt
> Don't you need two pulsing signals for each axis? Rotation and direction? How can you do that with a single 555 timer? Seems to me you would need a dual timer with an offset depending on which direction you want to 'go'.
> 
> Or am I missing something?
> 
> The Atari CTS-1 used a dual opto spinner for this sort of thing.
> 
> John :-#)#
>> 
>>> On 2/18/2015 4:16 PM, John Robertson wrote:
>>> Coinopwarehouse has about 75 cards up for sale. I bought a few, and they are in good condition. Lloyd said most didn't come with documents, but he does include what he has. He will combine ship too.
>>> 
>>> Worth looking at if you are rounding out your collection or want to trade with me sometime...
>>> 
>>> stores.ebay.com/coinopwarehouse?_dmd=1&_nkw=kurz
>>> 
>>> John :-#)#
>> 
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