TaviRider-Inspired Projects

And now, for TaviRider:

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  An overview of the board from the back-left corner.

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  A bit closer to view the displays.

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  The left-side roller, pulse generators, and NOR gates.

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  A closer view of the left roller and three of its outputs.

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  A rather poor shot of the #1 NOR gate feeing the #1 RSNOR latch.

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  The RSNOR latches which feed into the right-side 7-segment's inputs.

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  The pulse generators from the detector rails to the right-side RSNOR gates.

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  The right-side roller.

These dice were built mostly to test the theory that detector rail could be used to make a compact RNG. At the moment, I'd say that it is possible, though my implementation is flawed - I still get a null result and a double result on a more-than-occasional basis. The left side was built first and was found to be deeply flawed, with double results as common/more common than single results. After troubleshooting for some time to little result, I built the right side with a larger roller loop - I supposed, based on the high occurrence of the left-side roller giving double numbers, that a larger circuit for the cart might help - this one is designed so that the cart will never be touching two detector rails at once. Nonetheless, double numbers are still rolled - to help cull these, I've timed the call button to hit each NOR gate simultaneously. I've also wired the button into the reset line of the RSNOR latches with a delay, which *should* be weeding out all results but those pulled in a 1-tick window. I also attempted adding a pulse generator to the button to reduce the amount of time the NOR gates were closed, but ended up getting too many nulls. I suppose the detector rails must be producing overlapping signals still, though watching the torches would suggest otherwise.--JamesOfJames 23:33, 26 June 2011 (PDT)