HardLabs

Honeydew

Kaleidogeist·Honeydew·PCB/Honeydew.kicad_pcb

Honeydew PCB layout, top view — open source STM32 board by Kaleidogeist

About the Honeydew PCB

Honeydew is an open source STM32 PCB design by Kaleidogeist, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 331.8 × 166.1 mm, with 278 components from 32 distinct parts.

Its main chip is the STM32F072RBT6, from the STM32 family. Other key parts include the TPD2EUSB30A, TPS259533 and XC6206P332MR. By type, the board carries 99 diodes, 86 capacitors, 65 switches, 18 resistors, 4 ICs and 3 connectors.

It belongs with the keyboards designs in this gallery.

From the project

~60% 63-key QMK-compatible unified split ergonomic keyboard

Honeydew, from the project README
From the project README

Main components on the Honeydew

STM32F072RBT6TPD2EUSB30ATPS259533XC6206P332MR

Honeydew bill of materials (BOM)

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

QtyPartRefs
1
STM32F072RBT6
U1
1
TPD2EUSB30A
U2
1
TPS259533
U3
1
XC6206P332MR
U4
2
AO3400A
Q1, Q2
1
SWD
J2
1
C88360
VIK Keyboard Expansion
J3
1
C165948
USB In
J4
63
CPG151101S11
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +55
1
CPG151101S11
SW64
1
C318884
Reset
SW66
64
SK6812MINI-E
D1, D2, D3, D4, D5, D6, D7, D8 +56
1
1N4148
D65
1
C85708
5V
D66
33
BAV70
D67, D68, D69, D70, D71, D72, D73, D74 +25
1
C237300
60R@100MHz
FB1
2
4U7
4u7
C1, C5
71
100N
100n
C2, C3, C4, C6, C10, C13, C14, C23 +63
4
1u
C7, C15, C19, C20
4
10N
10n
C8, C11, C21, C22
Show 12 more
QtyPartRefs
1
10U
10u
C9
1
1u
C12
3
47U
47u
C16, C17, C18
3
5K1
5k1
R1, R10, R11
1
330K
330k
R2
1
1M
R3
1
1k
R4
8
10K
10k
R5, R6, R9, R13, R14, R15, R16, R17
1
100
R7
1
100K
100k
R8
1
12K
12k
R18
1
6K8
6k8
R19

Honeydew design files

The KiCad project lives in the Kaleidogeist/Honeydew repository on GitHub; these links point at the commit this page was built from.

Honeydew: common questions

What microcontroller does the Honeydew use?

The Honeydew is built around the STM32F072RBT6, from the STM32 family.

How big is the Honeydew PCB?

The Honeydew measures 331.8 × 166.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Honeydew?

278 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 Honeydew design files?

From the Kaleidogeist/Honeydew 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 Honeydew design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which Kaleidogeist chose for the repository.

Can I test firmware for the Honeydew without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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