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OpenFlowMeter

JochiSt·OpenFlowMeter

OpenFlowMeter PCB layout, top view — open source STM32 board by JochiSt
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About the OpenFlowMeter PCB

OpenFlowMeter is an open source STM32 PCB design by JochiSt, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 74 × 28 mm, with 132 components from 40 distinct parts.

Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the LT1492, R-78C3.3-1.0, SN65HVD231, 24LC64 and LT1491CS. By type, the board carries 66 resistors, 40 capacitors, 13 ICs, 5 connectors, 4 diodes and 2 transistors.

It belongs with the sensors designs in this gallery.

From the project

Measuring Flow

[1] M. van der Klis. PT100 channel flow meter for the LHC experiments, Technical Student Report Feb. 2001

[2] F.Hahn, S.Haider, M. v.d. Klis, C. Zinoni, Proposal for a gas flow meter at LHC, 10.2.2001

OpenFlowMeter, from the project README
From the project README

Main components on the OpenFlowMeter

LT1492STM32F103C8TxR-78C3.3-1.0SN65HVD23124LC64LT1491CSTMP100BME6804066

OpenFlowMeter bill of materials (BOM)

132 components, 40 distinct parts.

QtyPartRefs
5
LT1492
U1, U3, U6, U11, U13
1
STM32F103C8Tx
U2
1
R-78C3.3-1.0
U4
1
SN65HVD231
U5
1
24LC64
U7
1
LT1491CS
U8
1
TMP100
U9
1
BME680
Bosch Sensortec
U10
1
4066
U12
2
BC556
Q1, Q2
1
12 MHz
Y1
2
Screw_Terminal_01x04
J1, J2
1
Conn_01x04
J3
1
Conn_02x03_Odd_Even
J4
1
Conn_01x03
J5
1
Jumper_2_Open
JP1
1
LED rd
D1
2
LED yl
D2, D3
1
LED gn
D4
5
100n 50V
C1, C2, C3, C4, C11
Show 20 more
QtyPartRefs
27
100n
C5, C6, C9, C12, C14, C15, C16, C17 +19
4
10n
C7, C8, C36, C37
1
1u 50V
C10
1
1u
C13
2
27p
C19, C20
2
1k
R1, R15
6
47k
R2, R4, R16, R18, R47, R49
2
100k
R3, R17
2
100
R5, R19
2
47
R6, R20
2
220
R7, R21
23
10k
R8, R11, R12, R22, R25, R26, R29, R30 +15
4
22k
R9, R10, R23, R24
2
0
R13, R31
5
120
R14, R58, R59, R60, R61
4
2k2
R35, R36, R37, R38
2
56k
R39, R40
4
4k7
R42, R43, R44, R45
2
33k
R46, R48
4
5k6
R50, R51, R52, R53

OpenFlowMeter design files

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

OpenFlowMeter: common questions

What microcontroller does the OpenFlowMeter use?

The OpenFlowMeter is built around the STM32F103C8Tx, from the STM32 family.

How big is the OpenFlowMeter PCB?

The OpenFlowMeter measures 74 × 28 mm, has 4 copper layers and is 1.55992 mm thick.

How many components are on the OpenFlowMeter?

132 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the OpenFlowMeter design files?

From the JochiSt/OpenFlowMeter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the OpenFlowMeter design in my own project?

Yes, under the terms of its GPL-3.0 license, which JochiSt chose for the repository.

Can I test firmware for the OpenFlowMeter 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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