HardLabs

MiniFeed

SG-O·MiniFeedPCB

MiniFeed PCB layout, top view — open source STM32 board by SG-O

About the MiniFeed PCB

MiniFeed is an open source STM32 PCB design by SG-O, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 100 × 44.4 mm, with 81 components from 31 distinct parts.

Its main chip is the STM32G031KxT, from the STM32 family. Other key parts include the M24C32, DRV8876, USBLC6-2SC6, VG-7240TSWEG02 and VCNT2020. By type, the board carries 29 capacitors, 27 resistors, 9 ICs, 5 switches, 4 connectors and 1 module.

From the project

Main PCB for automated SMT Feeder

You can find the manufacturing documentation here.

MiniFeed, from the project README
From the project README

Main components on the MiniFeed

STM32G031KxTM24C32DRV8876USBLC6-2SC6VG-7240TSWEG02VCNT2020

MiniFeed bill of materials (BOM)

81 components, 31 distinct parts.

QtyPartRefs
1
STM32G031KxT
U1
1
M24C32
U2
1
DRV8876
U3
1
USBLC6-2SC6
U4
1
VG-7240TSWEG02
U5
4
VCNT2020
U6, U7, U8, U9
1
Motor_DC
M1
1
Debug
J1
1
Connector_1
J2
1
Connector_2
J4
1
PWR_Out
J5
1
CC
G1
1
BY
G2
3
SolderStandoffM3x5
Mech1, Mech2, Mech3
1
SW_-
SW1
1
SW_S
SW2
1
SW_+
SW3
1
Detect1
SW4
1
Detect2
SW5
1
RED
D1
Show 11 more
QtyPartRefs
6
2u2
C1, C17, C18, C22, C24, C25
13
100n
C2, C3, C4, C5, C7, C8, C11, C12 +5
3
10u
C6, C9, C16
1
22n
C10
2
1u
C20, C21
4
DNP
C26, C27, C28, C29
9
10k
R1, R2, R3, R5, R12, R13, R14, R15 +1
11
4k7
R4, R6, R7, R8, R9, R17, R18, R21 +3
1
1k
R10
1
20k
R11
5
150R
R19, R20, R22, R24, R26

MiniFeed design files

The KiCad project lives in the SG-O/MiniFeedPCB repository on GitHub; these links point at the commit this page was built from.

MiniFeed: common questions

What microcontroller does the MiniFeed use?

The MiniFeed is built around the STM32G031KxT, from the STM32 family.

How big is the MiniFeed PCB?

The MiniFeed measures 100 × 44.4 mm, has 2 copper layers and is 1 mm thick.

How many components are on the MiniFeed?

81 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the MiniFeed design files?

From the SG-O/MiniFeedPCB repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the MiniFeed design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which SG-O chose for the repository.

Can I test firmware for the MiniFeed 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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