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BBC-PS2

Board-Folk·keys·BBC B/Prototype/Kicad/BBC-PS2.kicad_pcb

BBC-PS2 PCB layout, top view — open source board by Board-Folk

About the BBC-PS2 PCB

BBC-PS2 is an open source PCB design by Board-Folk, published on GitHub. It is a 2-layer board measuring 91.4 × 100.5 mm, with 36 components from 20 distinct parts.

Other key parts include the 74LS163, 74LS251, 7445, 74LS30 and MT8816 Socket. By type, the board carries 14 diodes, 7 resistors, 6 ICs, 4 capacitors, 3 connectors and 1 transistor.

It belongs with the keyboards and retro computing designs in this gallery.

From the project

Board Folk Retro Keyboards and Adapters

A PS/2 and USB keyboard interface for the BBC Model B/B+ based on C64keyboard by Robert VanHazinga using an Arduino type board and an MT8816 switch chip. This is the original throughhole board. This is easier to build than the surface mount version. It currently won't work with the original BBC keyboard connected. The PS/2 configuration is for Arduino Nano, the USB, Seeeduino XIAO, same as the original project. The XIAO does take a few seconds to boot and recognise the keyboard, it's not as quick as the Atmega version. For Nano, you may need to toggle Arduino IDE between processor ATmega328P…

BBC-PS2, from the project README
From the project README

Main components on the BBC-PS2

74LS16374LS251744574LS30MT8816 SocketXAIO Socket

BBC-PS2 bill of materials (BOM)

36 components, 20 distinct parts.

QtyPartRefs
1
74LS163
U1
1
74LS251
U2
1
7445
U3
1
74LS30
U4
1
MT8816 Socket
U5
1
XAIO Socket
U7
1
BC517
Q2
2
PL1
J1, J3
1
PS/2
J2
1
SW_DIP_x08
SW1
10
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +2
1
SHIFT
D12
1
CAPS
D13
1
MOTOR
D14
1
BREAK
D15
4
47nF
C1, C2, C3, C4
4
470R
R1, R2, R3, R6
1
10K
R4
1
1K
R7
1
2K2
RN1

BBC-PS2 design files

The KiCad project lives in the Board-Folk/keys repository on GitHub; these links point at the commit this page was built from.

BBC-PS2: common questions

How big is the BBC-PS2 PCB?

The BBC-PS2 measures 91.4 × 100.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BBC-PS2?

36 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the BBC-PS2 design files?

From the Board-Folk/keys repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the BBC-PS2 design in my own project?

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

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