Zero-Drive Tratch Design Trade Study

discount-cactus / LVDC-Remake

Building an equivalent of the flight computer to the Saturn V rocket from the 1960's based on public documentation.

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Zero-Drive Tratch Design Trade Study #8

Closed discount-cactus closed 1 year ago

discount-cactus commented 1 year ago

Opening an issue to track development on the Zero-Drive Tratch circuit used in the Memory Control Element.

discount-cactus commented 1 year ago

Schematic in LVDC documentation:

discount-cactus commented 1 year ago

8-10-2023: Multiple instantiations of the Zero-Drive Tratch appear in the Multiply-Divide Element - therefore the circuit design was revisited out of necessity. To accompany its absence from the Memory Control Element PCB in order to be integrated on a standalone PCB tile late, the final design will be placed on a tile as well for the Memory Control Element PCB.

Rev1 of the design yielded the following circuit.

discount-cactus commented 1 year ago

9-1-2023: The next iteration of the Zero-Drive Tratch saw the circuit simplified to two IC's - a 3-channel 3-input AND gate IC and a 4-channel 2-input NOR gate IC. This brought the part count down from 34 components to 2.

This reduction will save complexity, sources of error and cost per unit. With this iteration, the design was deemed optimized.