HardLabs

Eight

mrieker·pdp8v·kicads/eight/eight.kicad_pcb

Eight PCB layout, top view — open source board by mrieker

About the Eight PCB

Eight is an open source PCB design by mrieker, published on GitHub. It is a 4-layer board measuring 200.7 × 73.7 mm, with 110 components from 9 distinct parts.

Other key parts include the 6J6. By type, the board carries 65 resistors, 24 connectors, 12 capacitors, 8 ICs and 1 diode.

From the project

PDP-8/V Vacuum Tube PDP-8 implementation

Vacuum tube implementation of PDP-8/V using a Raspberry PI for memory and I/O devices.

Website: https://www.outerworldapps.com/pdp8v

To generate PCBs (can be run from a PC or a RasPI): cd netgen make cd ../modules make << generates unrouted ACL, ALU, MA, PC, RPI, SEQ boards

open each of the above in its directory in the kicads directory ... and route route route!

Main components on the Eight

6J6

Eight bill of materials (BOM)

110 components, 9 distinct parts.

QtyPartRefs
8
6J6
U1, U2, U3, U4, U5, U6, U7, U8
16
CONN_01X03
J1, J2, J3, J4, J5, J6, J7, J8 +8
8
CONN_01X01
J17, J18, J19, J20, J21, J22, J23, J24
1
3.0V
D1
12
0.1u
C1, C2, C3, C4, C5, C6, C7, C8 +4
16
150K
R1, R2, R3, R4, R21, R22, R23, R24 +8
32
26.7K
R5, R6, R7, R8, R9, R10, R11, R12 +24
16
46.4K
R13, R14, R15, R16, R17, R18, R19, R20 +8
1
220
R65

Eight design files

The KiCad project lives in the mrieker/pdp8v repository on GitHub; these links point at the commit this page was built from.

Eight: common questions

How big is the Eight PCB?

The Eight measures 200.7 × 73.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Eight?

110 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Eight design files?

From the mrieker/pdp8v repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Eight design in my own project?

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

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