HardLabs

Fieldmill2

haunma·fieldmill·hardware/fieldmill/fieldmill2.kicad_pcb

Fieldmill2 PCB layout, top view — open source STM32 board by haunma

About the Fieldmill2 PCB

Fieldmill2 is an open source STM32 PCB design by haunma, published on GitHub under the CC-BY-SA-4.0 license. It is a 4-layer board measuring 102 × 102 mm, with 112 components from 50 distinct parts.

Its main chip is the STM32L496RxT, from the STM32 family. Other key parts include the OPA4197, TLV4376, USBLC6-2, Vishay_VCNT2020 and Si8605. By type, the board carries 38 resistors, 35 capacitors, 13 jumpers, 9 ICs, 4 connectors and 4 diodes.

From the project

Hardware and software for an electrostatic field mill

Main components on the Fieldmill2

OPA4197TLV4376USBLC6-2STM32L496RxTVishay_VCNT2020Si8605TLV700xxTPS72301DRV10975Z

Fieldmill2 bill of materials (BOM)

112 components, 50 distinct parts.

QtyPartRefs
1
OPA4197
U1
1
TLV4376
U2
1
USBLC6-2
U3
1
STM32L496RxT
U4
1
Vishay_VCNT2020
U6
1
Si8605
U7
1
TLV700xx
U9
1
TPS72301
U10
1
DRV10975Z
U11
1
ABM3B-8.0
Y1
1
USB debug
J1
1
JTAG SWD
J2
1
Optical Comms
J3
1
Battery (2x 18650), BLDC motor
J4
1
0805 hop
JP1
5
0603 hop
JP2, JP3, JP5, JP6, JP7
7
1206 hop
JP4, JP8, JP9, JP10, JP11, JP12, JP13
3
Mounting holes
MK1, MK2, MK3
1
Reset
SW1
1
Brush pads
TP1
Show 30 more
QtyPartRefs
1
Brush pad
TP2
1
mill_sensor
Z1
4
BAV199
D1, D2, D3, D4
1
FB
L1
4
220p
C5, C8, C9, C10
15
100n
C6, C7, C11, C12, C17, C18, C21, C22 +7
4
10n
C13, C14, C15, C16
2
10p
C19, C20
1
10u electrolytic
C23
2
10u
C32, C41
1
2.2u
C33
1
2.2u
C34
1
100n
C37
4
1u
C39, C40, C42, C43
4
47k
R1, R2, R3, R4
4
47M
R5, R6, R7, R8
8
12k
R9, R10, R11, R12, R13, R14, R15, R16
4
3k
R17, R18, R19, R20
1
620k
R21
1
430k
R22
2
2M
R23, R26
2
1M
R24, R25
2
0
R27, R38
4
10k
R28, R31, R32, R36
1
330
R29
1
180
R30
1
39
R33
1
22.1k
R34
1
11.5k
R35
1
0
R37

Fieldmill2 design files

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

Fieldmill2: common questions

What microcontroller does the Fieldmill2 use?

The Fieldmill2 is built around the STM32L496RxT, from the STM32 family.

How big is the Fieldmill2 PCB?

The Fieldmill2 measures 102 × 102 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Fieldmill2?

112 components, from 50 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fieldmill2 design files?

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

Can I use the Fieldmill2 design in my own project?

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

Can I test firmware for the Fieldmill2 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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