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Dr_C

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Dr_C

309 posts

Sorry if I upset you Gorp... my intention here is to help like-minded enthusiasts of Scalextric to get the most out of their new investment in ARC PRO power bases. Meanwhile I happen to believe this product is the most exciting development in SSD since the arrival of the C7030. Amazing and very impressive work by Scalextric and their ARC PRO design team!!! Sorry if this is off topic, but it needs to be said...

Dr_C

309 posts

Perhaps the thread title should be ‘Maximising digital and analog capabilities of early production versions of the Scalextric ARC PRO (December 2017)’... would this make sense?

Dr_C

309 posts

I really like your thinking. As you will have guessed I’m a newbie to forums but have a background in advanced MOSFET research... happy for you to start the new thread and I will certainly contribute... we could link back both to the earlier thread (which we both input into) and this one - alternatively I could start the new thread.. I’m happy either way :-) ... meanwhile... thanks for this recommendation... and, also, for your impressive work with the curve mod as per this thread!

Dr_C

309 posts

In above post... should read ‘digital to analog’ snips.... apols... :-)

Dr_C

309 posts

I’m a bit puzzled by Gorp’s analysis that suggests that other track parts require changing/modification if using the stock ARC PRO in analog mode. Clearly the curved lane changers will require the standard ‘analog to digital’ snips to the flexible pcb tracks - but I would assume this a given and mentioned in one of my earlier posts. Meanwhile, the reason why the slot forum mod is incompatible with analog mode is that it (not surprisingly) results in the two cars driving in opposite directions when in analog mode i.e. unsuitable for analog racing. Would a table showing the pros and cons of options A,B and C add useful value to this topic/subject?

Dr_C

309 posts

Thanks Gorp for this - yes - I now see my second sentence was a bit ambiguous I should have more precisely stated that ’With the standard stock ARC PRO the signal polarities of lane 1 and lane 2 are reversed with respect to each other.’ Does that help with consistency and interpretation of my post?

Also I agree that my so called ‘Option C‘ is more complex to implement than slot forum simple soldering mod, however Option C enables rapid switching from full digital capability to full analog capability simply by swapping out the two modified track parts with two standard parts. To achieve the same effect with the slot forum mod would, as proposed within the post, require an additional switch and... perhaps some cutting of the brand new ARC PRO enclosure to make the additional switch accessible. Taking this into account the effort is probably reasonably similar for those users who need both full digital and full analog capabilities.

Thanks again Gorp for spotting the ambiguity in my second sentence - much appreciated!

Dr_C

309 posts

The unmodified curved lane changers work perfectly with the APB where both lanes have the same digital signal polarities. With the ARC PRO the signal polarities of lane 1 and lane 2 have been reversed. The slot forum mod to the ARC PRO rectifies this polarity reversal by switching two wires so that unmodified curve lane changers will function in digital mode exactly as per the APB. My proposed Option C will also rectify this polarity reversal and so, again, unmodified curve changers will function in digital mode exactly as per the APB. I therefore firmly disagree with your assertion that the only solution is the modification of the curved lane changers. This is simply one of a number of compatibility options. In earlier posts I list three... A, B and C.

Dr_C

309 posts

My position is that there are three valid options and they all work well with various trade offs. In terms of my option C it will work very well in digital mode. Removing the modified track pieces returns the system to an entirly standard ARC PRO format which of course is well suited to analog mode (so long as any curved lane changers have been snipped with the standard digital to analog mod). This is a potential advantage over the slotforum ARC PRO mod which would cause cars to run in opposite direction in analog mode. But just to reiterate...  I’m not yet coming down in favour of any one specific option at this stage.... in fact I’ll be exploring all three options... with the intention of seeking to demonstrate useful and effective modifications in each case :-)

Dr_C

309 posts

Option C

modify two standard track pieces as below and then fit both sides of an unmodified ARC pro...

======= lane1

===X=== lane2

create a10mm dead zone in both rails at point X then ‘cross-wire‘ underneath using two jumper wires. Easy...

Dr_C

309 posts

Yes i see where you are coming from... for option C the modified track pieces enable an unmodified ARC pro to function with unmodified curved lane changers and unmodified digital lap counters. This is intended primarily as a digital solution where integration with unmodified curve lane changers is desiredd. If you want analog too, then can either remove the two option C track pieces, or with a bit of design effort could use double-pole double-throw switches on the track pieces themselves - it’s all very do-able... and I hope this helps...

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