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Old Busted vs. New Hotness

A project log for WITCH-E Decimal Based Computer

Document and create a modern replica of the Harwell Dekatron computer known as the WITCH

Dave's Dev Lab 11/20/2017 at 03:350 Comments

Got the new Pulse Generator assembled! The "new hotness" has the barrel jack moved as it was in an awkward place on the "Old Busted" design. I've removed the two switches and push button, replacing them with connections to the 5-wire input system. I also corrected two of the "white wire" changes that were required from the original design. Of course I am going to have to spin this design due to my "Off-By-One" error , and I really should have added some LEDs to indicate what function is being called, so this is technically "New Busted"... oh well....

As a side note, this PCB is 160mm x 100mm , and actually contains three separate sections. Most PCB shops will do quick turn prototypes pretty cheap if the design is 100mm x 100mm or smaller, so looking back on the design, it would have made more sense to break this up into at least two boards, and maybe three... it would have saved a lot of money and made the "logical module" appearance of the design better... 20/20 hindsight....

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