2 layers388 × 247 mm MIKey, the printed circuit board in 3D

MIKey

Those with tremors or motor function impairments (such as Parkinson’s) experience trouble when interacting with traditional computer peripherals (namely a keyboard).

Full screen GitHub .kicad_pcb

Size: 388 × 247 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 88
Nets: 44
Pads: 328
Tracks, vias: 835, 13
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 17 Sep 2022
Updated: 6 Dec 2022

Overview

MIKey is an open-source printed circuit board by MIKeyTAMU, from the MIKeyTAMU/MotorImpairmentKeyboard repository on GitHub. It is a 2-layer board of 388 × 247 mm with 88 parts on 44 nets, routed with 835 tracks and 13 vias.

It is built around the 74LS04PC and 74HC238D. It belongs with the RP2040 boards of this library.

Main components

About

Those with tremors or motor function impairments (such as Parkinson’s) experience trouble when interacting with traditional computer peripherals (namely a keyboard). Therefore, as use of technology becomes more prevalent, there exists a need for a simple assistive technology that provides better computer hardware accessibility to individuals with limited motor function. Existing assistive technologies are often too restrictive for those with mild to moderate motor function impairments (such as eye-trackers) and tend to sacrifice efficiency for the user. As a result, there is a need for a more traditional form of interaction that is easier for those with mild impairments to utilize. There also exists a need for a more affordable solution to this problem, as assistive devices can cost upwards of thousands of dollars, making them unattainable for a large section of the population.

Category and platform

RP2040

Project files

Show this board on your page

https://pcbkit.io/boards/MIKeyTAMU/MotorImpairmentKeyboard

The board's own page, for a message or a post.

Source

Repository: MIKeyTAMU/MotorImpairmentKeyboard
Board file: Hardware/MIKey/MIKey.kicad_pcb
Commit: 140aa44
Licence: Not stated

Parts

Qty	Value	Footprint	References
80	SW_DIP_x01	gateron_slim:gateron_slim	/1, A1, APOSTROPHE1, B1, BACK_TICK/TILDE1, BACKSPACE1, C1, CAPSLOCK1, COMMA/GTR_THN1, D1, DEL1, DOWN_ARROW1, E1, EIGHT1, ENTER1, EQUALS1 +64
3	74LS04	Package_DIP:DIP-14_W7.62mm	U1, U2, U3
2	74HC238	Package_DIP:DIP-16_W7.62mm	DECODER1, DECODER2
1	Pico	MCU_RaspberryPi_and_Boards:RPi_Pico_SMD_TH	U4

The 86 most common of 88 parts.

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Questions

How big is the MIKey PCB?

It measures 388 × 247 mm and has 2 copper layers, 1.6 mm thick.

What parts does the MIKey use?

88 parts, built around the 74LS04PC and 74HC238D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the MIKey KiCad files?

From the MIKeyTAMU/MotorImpairmentKeyboard repository on GitHub, at the commit this page was made from: the board is Hardware/MIKey/MIKey.kicad_pcb and its schematic Hardware/MIKey/MIKey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MIKey design in my own project?

Its repository states no licence, so its author keeps all rights: ask MIKeyTAMU before reusing the design.