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Thinkpad-USB-keyboard

bluepylons·A-Thinkpad-USB-keyboard·PCB/Thinkpad-USB-keyboard-PCB.kicad_pcb

Thinkpad-USB-keyboard PCB layout, top view — open source RP2040/RP2350 board by bluepylons
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About the Thinkpad-USB-keyboard PCB

Thinkpad-USB-keyboard is an open source RP2040/RP2350 PCB design by bluepylons, published on GitHub. It is a 2-layer board measuring 111 × 64 mm, with 85 components from 32 distinct parts.

Its main chip is the C2040, from the RP2040/RP2350 family. Other key parts include the C7420376, C16251, C97521 and C15578. By type, the board carries 34 capacitors, 23 resistors, 8 ICs, 5 connectors, 3 transistors and 3 diodes.

It belongs with the keyboards designs in this gallery.

From the project

This is a project attempting to make a USB keyboard/Trackpoint controller and enclosure for the non-chiclet Thinkpad keyboard (from the 10/20 generation, such as the T410, W520, etc.). These were, in my opinion, the best Thinkpad keyboards ever made.

This is a project attempting to make a USB keyboard/Trackpoint controller and enclosure for the non-chiclet Thinkpad keyboard (from the 10/20 generation, such as the T410, W520, etc.). These were, in my opinion, the best Thinkpad keyboards ever made.

The current plan is to use an RP2040 microcontroller running QMK to handle the key matrix scanning and Trackpoint. I would also like to add a USB 2.0 hub.

Main components on the Thinkpad-USB-keyboard

C7420376C2040C16251C97521C15578

Thinkpad-USB-keyboard bill of materials (BOM)

85 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
C7420376
SRV05-4
U1, U4, U5, U10
1
C2040
RP2040
U2
1
C16251
USB2514B_Bi
U3
1
C97521
W25Q128JVS
U6
1
C15578
TLV1117-33
U8
3
C52895
BSS138
Q1, Q2, Q3
1
C91744
24MHz
Y1
1
C9002
12MHz
Y2
2
C165948
USB_C_Receptacle_USB2.0
J1, J7
2
USB_A
J2, J3
1
Conn_02x20_Odd_Even_MountingPin
J6
1
C142689
ASMD1206-150
Shenzhen JDT Fuse
F1
4
MountingHole
H9, H10, H11, H12
1
SW_Push
SW1
1
C123799
SMF9.0CA
Microdiode Electronics
D1
2
C114257
RB060M-60TR
D3, D4
1
C394451
60R@100MHz
MELED Industrial
L1
13
C13585
10uF
C1, C2, C14, C15, C16, C17, C18, C19 +5
2
C1549
18pF
C3, C4
2
C1555
22pF
C5, C9
Show 12 more
QtyPartRefs
15
C1525
100nF
C6, C7, C8, C10, C11, C12, C13, C22 +7
2
C15849
1uF
C21, C29
2
C27834
5.1k
R1, R2
2
C2991567
27
R3, R13
6
C25804
10K
R4, R11, R20, R21, R22, R23
1
C17444
12k
R5
4
C17756
56k
R6, R7, R8, R9
2
C17408
100
R10, R18
1
C149504
100k
R12
3
C17513
1K
R14, R15, R16
1
DNI
R17
1
C17514
1M
R19

Thinkpad-USB-keyboard design files

The KiCad project lives in the bluepylons/A-Thinkpad-USB-keyboard repository on GitHub; these links point at the commit this page was built from.

Thinkpad-USB-keyboard: common questions

What microcontroller does the Thinkpad-USB-keyboard use?

The Thinkpad-USB-keyboard is built around the C2040, from the RP2040/RP2350 family.

How big is the Thinkpad-USB-keyboard PCB?

The Thinkpad-USB-keyboard measures 111 × 64 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Thinkpad-USB-keyboard?

85 components, from 32 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 Thinkpad-USB-keyboard design files?

From the bluepylons/A-Thinkpad-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 Thinkpad-USB-keyboard design in my own project?

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

Can I test firmware for the Thinkpad-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.

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