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T80-5700

nearestexit·t80-5000·t80-5700/t80-5700.kicad_pcb

T80-5700 PCB layout, top view — open source RP2040/RP2350 board by nearestexit
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About the T80-5700 PCB

T80-5700 is an open source RP2040/RP2350 PCB design by nearestexit, published on GitHub. It is a 2-layer board measuring 81 × 130.6 mm, with 56 components from 19 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS, XC6206PXXXMR and SRV05-4. By type, the board carries 20 diodes, 16 capacitors, 13 resistors, 4 ICs, 1 crystal and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

QMK Compatible RP2040-based USB PCBs for the Cherry G80-5000 and the G80-5700.

QMK Compatible Open Hardware USB-C PCBs for the vintage Cherry G80-5000 split ergonomic keyboard and its companion numpad, the G80-5700.

This project brings the G80-5000 & 5700 into the 21st century, with all three pieces able to function independently. There are four PCBs included in this project: the T80-5000 Left, T80-5000 Right, T80-5000 Daughterboard, and T80-5700. The T80-5000 Left & Right work with QMK's split keyboard functionality, and the T80-5700 functions as an independent keyboard which can be passed through the right half's USB hub.

T80-5700, from the project README
From the project README

Main components on the T80-5700

RP2040W25Q128JVSXC6206PXXXMRSRV05-4

T80-5700 bill of materials (BOM)

56 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
W25Q128JVS
U2
1
XC6206PXXXMR
XC6206PxxxMR
U3
1
SRV05-4
U4
1
CRYSTAL_GND24
Crystal_GND24
Y1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J1
1
500MA
500mA
F1
20
C81598
D_Small
D5, D6, D7, D8, D9, D10, D11, D12 +12
4
1u
C1, C5, C6, C10
8
100N
100n
C2, C3, C7, C9, C11, C12, C13, C16
1
10U
10u
C4
1
100N
100nF
C8
2
22P
22p
C14, C15
1
5.1K
5.1k
R1
2
27R
R2, R3
4
300
R5, R7, R9, R11
1
1k
R12
4
5.1K
5.1k
R13, R14, R15, R16
1
1k
R17

T80-5700 design files

The KiCad project lives in the nearestexit/t80-5000 repository on GitHub; these links point at the commit this page was built from.

T80-5700: common questions

What microcontroller does the T80-5700 use?

The T80-5700 is built around the RP2040, from the RP2040/RP2350 family.

How big is the T80-5700 PCB?

The T80-5700 measures 81 × 130.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the T80-5700?

56 components, from 19 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 T80-5700 design files?

From the nearestexit/t80-5000 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 T80-5700 design in my own project?

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

Can I test firmware for the T80-5700 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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