HardLabs

Saptest1

RileyLeff·sapflux_sensor

Saptest1 PCB layout, top view — open source STM32 board by RileyLeff

About the Saptest1 PCB

Saptest1 is an open source STM32 PCB design by RileyLeff, published on GitHub. It is a 2-layer board measuring 33.4 × 26.8 mm, with 8 components from 8 distinct parts.

Its main chip is the C2071924, from the STM32 family. Other key parts include the C179326 and C2847904. By type, the board carries 4 ICs, 2 diodes, 1 connector and 1 fuse.

It belongs with the sensors and power & battery designs in this gallery.

From the project

An open hardware logic board for experimental heat-pulse sap flux sensors.

An open hardware logic board for experimental heat-pulse sap flux sensors.

Sap flux sensors estimate how water moves through trees by watching heat move through sapwood. That sounds simple until the signal leaves the tree. Probe spacing, thermal properties, calibration choices, firmware decisions, and downstream models all shape what a sap flux estimate can mean. My dissertation work starts from that leak in the measurement pipeline.

Saptest1, from the project README
From the project README

Main components on the Saptest1

C179326C2071924C2847904

Saptest1 bill of materials (BOM)

8 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C179326
CAT24C32WI-GT3
Nexperia
U1
1
C2071924
STM32G0B1CBT6
Texas Instruments
U2
1
C2847904
KF2EDGV-3_5-10P
STMicroelectronics
U3
1
C179326
LMR14006YDDCR
Nexperia
U5
1
C441321
M8-P4A-GPL_M8-JD
Cixi Kefa Elec
J1
1
C19727305
2920L110/60MR
XFCN
F1
1
C2835429
SS36
TECH PUBLIC
D1
1
C19077549
SMAJ30A_C698947
hongjiacheng
D2

Saptest1 design files

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

Saptest1: common questions

What microcontroller does the Saptest1 use?

The Saptest1 is built around the C2071924, from the STM32 family.

How big is the Saptest1 PCB?

The Saptest1 measures 33.4 × 26.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Saptest1?

8 components, from 8 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 Saptest1 design files?

From the RileyLeff/sapflux_sensor 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 Saptest1 design in my own project?

The repository has no license, so all rights stay with RileyLeff. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Saptest1 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.

More boards in sapflux_sensor

Similar boards