The 8bit keyboard.

This keyboard inputs characters in 8bits.

HIGEDARUMA

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Description

This keyboard inputs characters in 8bits.

Eight toggle switches are used to enter ASCII codes bit by bit.

To achieve operation similar to that of a regular keyboard, it has a function to stock up to three input keys and a key lock function to keep the stocked characters active at all times.

Details

How to use.

Key Input

"a" is the ASCII code 0x61 ( 011000001 ).If you set it with the keyboard, it will look like this.

Set the "a" ( HEX: 0x61, BIN: 01100001 ) key.
Press the key button.

"a" is sent.

Multiple inputs

You can press multiple keys at the same time by using the stock button.
*Press the key button to release the stock.

Set the "shift" ( HEX: 0x81, BIN: 10000001 ) key.
Press the stock button.
Set the "a" ( HEX: 0x61, BIN: 01100001 ) key.
Press the key button.

"A" is sent.

However, if you set "A" ( 0x41 ), you can set "a" ( 0x61 ) without the need for a "shift" ( 0x81 ) key.

Key Lock

With a key lock, you hold down a stocked key.
*When you unlock the key, the stock will be released.

Set the "shift" ( 0x81 ) key.
Press the stock button.
Lock the key.
Set the "a" ( 0x61 ) key.
Press the key button.

"A" is sent

Unlock the key.
Press the key button.

"a" is sent.

DEMO

Files

8bitkeyboard_arudino_src.zip source code. Zip Archive - 3.77 kB - 08/31/2023 at 03:32		Download
Enclosure_Drawing.pdf Drawing for laser cutting. Wood used is MDF 4mm. Adobe Portable Document Format - 5.77 kB - 08/31/2023 at 03:29	Preview	Download

substrate.pdf Adobe Portable Document Format - 55.30 kB - 08/31/2023 at 03:23	Preview	Download

circuit_diagram.pdf Adobe Portable Document Format - 72.08 kB - 08/31/2023 at 03:23	Preview	Download

Components

1 × ESP-WROOM-32
8 × 15A 220V ON/OFF toggle switch Development Kits, Boards and Systems / Development Kits and Boards
1 × Key Switch ON OFF Lock Switch
1 × LED (Red) Electronic Components / Misc. Electronic Components
2 × Push switch

View all 7 components

Project Logs

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Typing Demo
HIGEDARUMA • 09/12/2023 at 11:03 • 0 comments

I used a character input speed measurement application for Japanese input to measure input speed.
Be particular about appearances
HIGEDARUMA • 08/31/2023 at 04:43 • 0 comments

The texture of MDF is not cool enough.

Therefore, natural wood stickers are applied to express the quality of the wood.
Structure of the system
HIGEDARUMA • 08/31/2023 at 04:38 • 0 comments

Place switches and other devices on the home-made board and check their operation.

Installed in enclosure.
Manufacture of enclosures
HIGEDARUMA • 08/31/2023 at 04:18 • 0 comments

The enclosure is made of 4 mm MDF using a laser cutter.

When assembled, it looks like this.
The 8bit keyboard Components
HIGEDARUMA • 08/31/2023 at 04:04 • 0 comments

Various parts set.
The MCU and board in this picture are the Raspberry Pi pico version.