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FrontPanel

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

FrontPanel PCB layout, top view — open source board by 89Mods
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About the FrontPanel PCB

FrontPanel is an open source PCB design by 89Mods, published on GitHub under the MIT license. It is a 2-layer board measuring 258.1 × 122.9 mm, with 118 components from 16 distinct parts.

Other key parts include the 74HC244, 74HCT138, SM420561N and NE555D. By type, the board carries 43 resistors, 22 ICs, 22 diodes, 20 switches, 5 transistors and 5 capacitors.

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 FrontPanel

74HC24474HCT138SM420561NNE555D

FrontPanel bill of materials (BOM)

118 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
74HC244
U1, U4, U5
2
74HCT138
U2, U3
16
SM420561N
U6, U7, U8, U9, U10, U11, U12, U13 +8
1
NE555D
U22
5
2N7002
Q1, Q2, Q3, Q4, Q5
1
TO_FP
J1
20
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +12
20
LED
D1, D2, D3, D4, D5, D6, D7, D8 +12
2
LED
D21, D22
3
1µF
C1, C3, C4
1
100NF
100nF
C2
1
1000µF
C5
19
1K
R1, R2, R3, R4, R5, R6, R7, R8 +11
16
470
R20, R21, R22, R23, R24, R25, R26, R27 +8
7
330
R36, R37, R38, R39, R40, R41, R42
1
200K
R43

FrontPanel design files

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

FrontPanel: common questions

How big is the FrontPanel PCB?

The FrontPanel measures 258.1 × 122.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the FrontPanel?

118 components, from 16 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 FrontPanel 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 FrontPanel design in my own project?

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

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