[Techtoolslist] Kurz Kasch test fixture cards on eBay

[John Robertson]

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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