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Temperature logger

Jana-Marie·temperature-logger

Temperature logger PCB layout, top view — open source STM32 board by Jana-Marie
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About the Temperature logger PCB

Temperature logger is an open source STM32 PCB design by Jana-Marie, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 106 × 50 mm, with 151 components from 30 distinct parts.

Its main chip is the STM32F072C8TX, from the STM32 family. Other key parts include the USBLC6-4, AP2204R-3.3, MAX31855KASA, DRV8837 and TLV9001. By type, the board carries 59 resistors, 36 capacitors, 14 diodes, 13 ICs, 12 connectors and 8 inductors.

It belongs with the sensors and test & measurement designs in this gallery.

From the project

Anotter USB temperature logger that can record up to four channels with thermocouple or NTCs connected via CDC directly or SCPI to USB.

Anotter USB temperature logger that can record up to four channels with thermocouple or NTCs connected via CDC directly or SCPI to USB. You can choose how you want to receive the data by moving the selector switch next to the Type-C receptacle. If you switch to CSV, it will simply output all connected channels to your console in a machine and human readable format (CSV or TSV, I prefer TSV) at about 10 readings per second. If you switch to SCPI, an SCPI terminal is displayed via USB so that you can integrate the logger into your lab equipment. This is particularly handy because you can also…

Temperature logger, from the project README
From the project README

Main components on the Temperature logger

USBLC6-4AP2204R-3.3STM32F072C8TXMAX31855KASADRV8837TLV9001

Temperature logger bill of materials (BOM)

151 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
USBLC6-4
U1, U13
1
AP2204R-3.3
U2
1
STM32F072C8TX
STM32F072C8Tx
U3
4
MAX31855KASA
U4, U5, U6, U7
1
DRV8837
U8
4
TLV9001
U9, U10, U11, U12
3
2N7002
Q1, Q3, Q5
3
BC817
Q2, Q4, Q6
1
USB
J1
4
THERMOCOUPLE
J2, J3, J4, J5
1
OUT
J6
1
I2C
J7
4
DNP
J8, J9, J10, J11
1
TC2030
P1
1
DFU
JP1
1
SCPI_CSV
SW1
1
NTC
TH1
5
RED
D1, D3, D5, D7, D9
8
GREEN
D2, D4, D6, D8, D10, D12, D13, D14
1
BLUE
D11
Show 10 more
QtyPartRefs
8
FERRET
FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB8
14
100N
100n
C1, C2, C3, C4, C5, C7, C10, C11 +6
3
1UF
1uF
C6, C8, C9
8
10N
10n
C14, C16, C18, C20, C26, C28, C30, C32
10
DNP
C21, C23, C25, C27, C29, C31, C33, C34 +2
1
DNP
C22
7
5K1
5k1
R1, R2, R3, R16, R17, R27, R28
20
220
R4, R5, R7, R8, R10, R11, R13, R14 +12
4
10
R6, R9, R12, R15
28
DNP
R29, R30, R31, R32, R33, R34, R35, R36 +20

Temperature logger design files

The KiCad project lives in the Jana-Marie/temperature-logger repository on GitHub; these links point at the commit this page was built from.

Temperature logger: common questions

What microcontroller does the Temperature logger use?

The Temperature logger is built around the STM32F072C8TX, from the STM32 family.

How big is the Temperature logger PCB?

The Temperature logger measures 106 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Temperature logger?

151 components, from 30 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Temperature logger design files?

From the Jana-Marie/temperature-logger repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Temperature logger design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which Jana-Marie chose for the repository.

Can I test firmware for the Temperature logger 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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