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BusMonitor

89Mods·LVDC·KiCad/BusMonitor/BusMonitor.kicad_pcb

BusMonitor PCB layout, top view — open source board by 89Mods

About the BusMonitor PCB

BusMonitor is an open source PCB design by 89Mods, published on GitHub under the MIT license. It is a 2-layer board measuring 105.2 × 70.6 mm, with 53 components from 6 distinct parts.

Other key parts include the 74HCT244. By type, the board carries 40 diodes, 5 ICs, 5 resistors, 2 capacitors and 1 connector.

From the project

Replica of the Launch Vehicle Digital Computer using 74-series logic

This LVDC is accurate to the original in the sense that it executes the same instructions that function the exact same, has the same memory layout (including special locations like HOP save and MQ) and can execute snippets of original LVDC code.

The differences are: - This computer is parallel and not bit-serial, and is also microcoded - It is implemented using 74-series logic and not discrete transistors (I wish to be able to take it with me to events, so it couldn’t get too big) - Everything hooked up to the PIO (IO read/write) instruction is my own invention, with the exception of the the…

Main components on the BusMonitor

74HCT244

BusMonitor bill of materials (BOM)

53 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
5
74HCT244
U1, U2, U3, U4, U5
1
TO_BACKPLANE
J1
40
LED
D1, D2, D3, D4, D5, D6, D7, D8 +32
1
100NF
100nF
C1
1
10µF
C2
5
330
R1, R2, R3, R4, R5

BusMonitor design files

The KiCad project lives in the 89Mods/LVDC repository on GitHub; these links point at the commit this page was built from.

BusMonitor: common questions

How big is the BusMonitor PCB?

The BusMonitor measures 105.2 × 70.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BusMonitor?

53 components, from 6 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the BusMonitor design files?

From the 89Mods/LVDC repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the BusMonitor design in my own project?

Yes, under the terms of its MIT license, which 89Mods chose for the repository.

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