HardLabs

MiniFeedMaster

SG-O·MiniFeedMaster

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

About the MiniFeedMaster PCB

MiniFeedMaster 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 58.4 × 83.2 mm, with 125 components from 48 distinct parts.

Its main chip is the STM32F105Rx, from the STM32 family. Other key parts include the TPS76350, SN6505B, ISO1044, ISO6721 / ISO7721 and USBLC6-2SC6. By type, the board carries 54 capacitors, 36 resistors, 11 ICs, 9 connectors, 7 diodes and 2 switches.

From the project

Mainboard for automated SMT Feeder system

You can find the manufacturing documentation here.

MiniFeedMaster, from the project README
From the project README

Main components on the MiniFeedMaster

STM32F105RxTPS76350SN6505BISO1044ISO6721 / ISO7721USBLC6-2SC6LMR16020TPS82140ISO1541

MiniFeedMaster bill of materials (BOM)

125 components, 48 distinct parts.

QtyPartRefs
1
STM32F105Rx
U1
1
TPS76350
U2
1
SN6505B
U3
1
ISO1044
U4
1
ISO6721 / ISO7721
U5
3
USBLC6-2SC6
U6, U10, U11
1
LMR16020
U7
1
TPS82140
U8
1
ISO1541
U9
1
25MHz ±10ppm 20pF 40Ω
Y1
1
SWD
J1
1
CAN
J2
1
UART
J3
1
USB
J4
1
Feeder
J5
1
Chain
J6
1
VIn
J7
1
I2C
J8
1
EXT
J9
1
DNP
FL1
Show 28 more
QtyPartRefs
1
END
JP2
1
Button
SW1
1
Reset
SW2
1
1:2.1
TR1
3
RED
D1, D6, D7
2
MBR0520L
D2, D3
1
ESDCAN24
D4
1
SS2P4HM3
D5
1
600R_2A
FB1
1
33u
L1
18
10u
C1, C6, C9, C16, C18, C20, C22, C25 +10
27
100n
C2, C3, C4, C5, C7, C8, C10, C11 +19
2
27p
C12, C13
2
10u 50V
C32, C33
1
220p
C34
3
47u
C36, C37, C38
1
2n2
C43
14
10k
R1, R2, R3, R5, R10, R21, R26, R27 +6
1
150R
R4
6
1k5
R6, R15, R16, R24, R25, R36
2
0R
R7, R8
3
5k1
R9, R13, R14
2
22R
R11, R12
3
150k
R17, R19, R31
2
100R
R18, R33
1
15k8
R20
1
309k
R22
1
100k
R23

MiniFeedMaster design files

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

MiniFeedMaster: common questions

What microcontroller does the MiniFeedMaster use?

The MiniFeedMaster is built around the STM32F105Rx, from the STM32 family.

How big is the MiniFeedMaster PCB?

The MiniFeedMaster measures 58.4 × 83.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MiniFeedMaster?

125 components, from 48 distinct parts. The full bill of materials is listed on this page.

Where can I download the MiniFeedMaster design files?

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

Can I use the MiniFeedMaster 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 MiniFeedMaster 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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