Replica ASCII Keyboard

Replica ASCII Keyboard Photo

Based on the issue 4 schematic and photos of an issue 3 Keyboard.

The keyboard is a close copy of the original.  The power-up-reset circuit (IC7) was not present on the issue 3 keyboard and so that part of the layout is new.

The original keyboard had a latching CAPS LOCK key switch, these are hard/impossible to find and so an alternative electronic implementation has been made using a second 555 timer (IC8).

The keyboard requires a donor BBC computer keyboard and optional Atom case (you can see I didn't destroy a decent Atom case !).

The BBC computer keyboard mounting plate needs to be cut down (removing the function keys).

The Atom case requires modification to allow for the extra keys and holes drilled for the LEDs, the board then directly replaces the original Atom PCB.

The links have the following functions:


Bill Of Materials

CAD Files

Here is my Visio drawing of the Atom/System keyboard including the bezel design for the new keyboard.  For those without Visio I've added a .pdf of the bezel drawing.


Blank PCB

Replica ASCII Keyboard PCB

Assembled PCB (no keycaps)

Replica ASCII Keyboard PCB No Keycaps


Assembled PCB (with keycaps)

Replica ASCII Keyboard with Keycaps



Replica ASCII Keyboard Bezel


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