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Program-Counter

DutchMaker·TTL-computer·Circuits/KiCad/Program-Counter/Program-Counter.kicad_pcb

Program-Counter PCB layout, top view — open source board by DutchMaker
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About the Program-Counter PCB

Program-Counter is an open source PCB design by DutchMaker, published on GitHub. It is a 2-layer board measuring 81.3 × 82.6 mm, with 15 components from 7 distinct parts.

Other key parts include the 74x02, 74x191 and 74x245. By type, the board carries 9 ICs, 2 connectors and 2 resistors.

From the project

Building a computer from scratch using 74xx logic chips

- Add ./Libraries/74xx-Computer-Symbols.lib as global Symbol library to KiCad (Eeschema) - Add ./Libraries as global Footprint library to KiCad (Pcbnew) - PCBs are initially autorouted using ./Libraries/freeRouting.jar and traces are enhanced manually

There are a number of deviations and errors that were found in schematic/PCB designs after PCB production. They are listed here if they were not fixed in the schematic/PCB design files.

Main components on the Program-Counter

74x0274x19174x245

Program-Counter bill of materials (BOM)

15 components, 7 distinct parts.

QtyPartRefs
1
74x02
U1
4
74x191
U2, U3, U4, U5
4
74x245
U6, U7, U8, U9
1
Conn_01x18_Male
J1
1
MEMORY ADDRESS
J2
2
HDSP-4830_2
BAR1, BAR2
2
470
RN1, RN2

Program-Counter design files

The KiCad project lives in the DutchMaker/TTL-computer repository on GitHub; these links point at the commit this page was built from.

Program-Counter: common questions

How big is the Program-Counter PCB?

The Program-Counter measures 81.3 × 82.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Program-Counter?

15 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Program-Counter design files?

From the DutchMaker/TTL-computer repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Program-Counter design in my own project?

The repository has no license, so all rights stay with DutchMaker. Use it as a reference, and ask the author before reusing the design.

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