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Control

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

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

Control is an open source PCB design by 89Mods, published on GitHub under the MIT license. It is a 4-layer board measuring 209.6 × 108.5 mm, with 81 components from 27 distinct parts.

Other key parts include the 74HC574, 74HCT04, 74HCT157, 74HCT08 and 74HCT32. By type, the board carries 41 ICs, 13 capacitors, 11 resistors, 8 connectors and 8 diodes.

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 Control

74HC57474HCT0474HCT15774HCT0874HCT3228C1674HCT16374HCT0074HCT7474HC8574HC7474HC68874HC0074HC02

Control bill of materials (BOM)

81 components, 27 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
74HC574
U1, U7
3
74HCT04
U2, U17, U23
10
74HCT157
U3, U4, U5, U6, U8, U20, U36, U37 +2
7
74HCT08
U9, U11, U21, U24, U25, U28, U30
4
74HCT32
U10, U16, U22, U29
2
28C16
U12, U13
1
74HCT163
U14
1
74HCT00
U15
4
74HCT74
U18, U19, U26, U27
2
74HC85
U31, U32
1
74HC74
U33
1
74HC688
U34
1
74HC00
U35
1
74HC74
U40
1
74HC02
U41
1
TO_BACKPLANE
J1
1
TO_ALU
J2
1
TO_MEMORY
J3
1
TO_REGISTERS
J4
1
TO_MULDIV
J5
Show 7 more
QtyPartRefs
3
CONN_01X01
Conn_01x01
J6, J7, J8
8
LED
D1, D2, D3, D4, D5, D6, D7, D8
8
100NF
100nF
C1, C7, C8, C9, C10, C11, C12, C13
5
10µF
C2, C3, C4, C5, C6
7
1K
R1, R2, R6, R8, R9, R10, R11
1
4.7K
R3
3
15K
R4, R5, R7

Control design files

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

Control: common questions

How big is the Control PCB?

The Control measures 209.6 × 108.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Control?

81 components, from 27 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 Control 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 Control design in my own project?

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

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