HardLabs

Micropad

blakesmith·micropad·hardware/micropad/micropad.kicad_pcb

Micropad PCB layout, top view — open source STM32 board by blakesmith
Simulate this board

About the Micropad PCB

Micropad is an open source STM32 PCB design by blakesmith, published on GitHub. It is a 2-layer board measuring 45.1 × 76.5 mm, with 27 components from 16 distinct parts.

Its main chip is the STM32F042K6Ux, from the STM32 family. Other key parts include the LD1117S33TR_SOT223 and APA102. By type, the board carries 9 resistors, 6 capacitors, 4 switches, 3 ICs, 2 connectors and 2 diodes.

It belongs with the keyboards designs in this gallery.

From the project

Custom macropad hardware keyboard.

This is a small macropad keyboard I built, mostly for controlling my music while working.

- KiCAD schematic and PCB design. - OpenSCAD case and top plate designs. - Custom Rust firmware for the STM32F042 microcontroller - Bill of materials, of all the components used.

Main components on the Micropad

LD1117S33TR_SOT223STM32F042K6UxAPA102

Micropad bill of materials (BOM)

27 components, 16 distinct parts.

QtyPartRefs
1
LD1117S33TR_SOT223
U1
1
STM32F042K6Ux
U2
1
APA102
U3
1
SWD Debug
J1
1
USB_C_Receptacle_USB2.0
J2
1
Fuse_Small
F1
1
PEC11R
S1
1
SW_SPST
SW1
2
SW_SPST
SW2, SW3
2
LED
D1, D2
3
0.1u
C1, C2, C3
1
4.7u
C4
2
0.01u
C5, C6
5
10k
R1, R4, R5, R6, R7
2
100
R2, R3
2
5.1k
R8, R9

Micropad design files

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

Micropad: common questions

What microcontroller does the Micropad use?

The Micropad is built around the STM32F042K6Ux, from the STM32 family.

How big is the Micropad PCB?

The Micropad measures 45.1 × 76.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Micropad?

27 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Micropad design files?

From the blakesmith/micropad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Micropad design in my own project?

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

Can I test firmware for the Micropad 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.

Similar boards