Wltc usb keyboard

fpracek·wltc-usb-keyboard·hardware/Wang WLTC USB.kicad_pcb

About the Wltc usb keyboard PCB

Wltc usb keyboard is an open source RP2040/RP2350 PCB design by fpracek, published on GitHub under the MIT license. It is a 2-layer board measuring 336.5 × 178 mm, with 183 components from 11 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 90 switches, 90 diodes and 1 module.

It belongs with the keyboards designs in this gallery.

From the project

USB replica of the Wang LapTop Computer keyboard - PCB + Pico firmware

KiCad 7 project for the replica keyboard PCB: a 7x16 diode matrix wired to a Raspberry Pi Pico footprint, laid out to match the real WLTC keyboard's physical key positions (reconstructed from a photo of a real unit, cross-checked against the PORTNAME/PORTCODE table in the MAME driver so the firmware's HID output lands on the exact keys the driver expects - see ../firmware/).

Main components on the Wltc usb keyboard

RaspberryPi_Pico

Wltc usb keyboard bill of materials (BOM)

183 components, 11 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RaspberryPi_Pico	RaspberryPi_Pico_Common_Unspecified	A1
1	SW_stab	Stabilizer_Cherry_MX_2.00u	ST68
1	SW_stab	Stabilizer_Cherry_MX_7.00u	ST85
4	SW_Push	SW_Cherry_MX_PCB_1.25u	SW1, SW2, SW3, SW4
77	SW_Push	SW_Cherry_MX_PCB_1.00u	SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12 +69
2	SW_Push	SW_Cherry_MX_PCB_2.00u	SW36, SW65
2	SW_Push	SW_Cherry_MX_PCB_1.50u	SW37, SW79
3	SW_Push	SW_Cherry_MX_PCB_1.75u	SW53, SW84, SW86
1	SW_Push	SW_Cherry_MX_PCB_2.25u	SW68
1	SW_Push	SW_Cherry_MX_PCB_7.00u	SW85
90	D	D_SOD-123F	D1, D2, D3, D4, D5, D6, D7, D8 +82

Wltc usb keyboard design files

The KiCad project lives in the fpracek/wltc-usb-keyboard repository on GitHub; these links point at the commit this page was built from.

Layouthardware/Wang WLTC USB.kicad_pcb
Schematichardware/Wang WLTC USB.kicad_sch
BOMhardware/production/bom.csv

Wltc usb keyboard: common questions

What microcontroller does the Wltc usb keyboard use?

The Wltc usb keyboard is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Wltc usb keyboard PCB?

The Wltc usb keyboard measures 336.5 × 178 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Wltc usb keyboard?

183 components, from 11 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Wltc usb keyboard design files?

From the fpracek/wltc-usb-keyboard repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Wltc usb keyboard design in my own project?

Yes, under the terms of its MIT license, which fpracek chose for the repository.

Can I test firmware for the Wltc usb keyboard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.