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Sdi12-adapter

z4ika·sdi12-adapter

Sdi12-adapter PCB layout, top view — open source STM32 board by z4ika
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About the Sdi12-adapter PCB

Sdi12-adapter is an open source STM32 PCB design by z4ika, published on GitHub under the AGPL-3.0 license. It is a 4-layer board measuring 52.5 × 30.3 mm, with 37 components from 24 distinct parts.

Its main chip is the STM32G431CBUx, from the STM32 family. Other key parts include the LDI1117-3.3H and TXS0102DCT. By type, the board carries 14 capacitors, 9 resistors, 5 connectors, 4 diodes, 3 ICs and 1 crystal.

From the project

STM32F103CBT6 based SDI-12 to USB2.0 adapter board

Current revision includes bidirectional 5V - 3.3V level shifting without logical voltage level inversion. This ensures compability of SDI standard with TTL logic. All of the parts have been standarized and designated manufacturer is JLCPCB. Project includes index.html as BOM listing.

Sdi12-adapter, from the project README
From the project README

Main components on the Sdi12-adapter

LDI1117-3.3HSTM32G431CBUxTXS0102DCT

Sdi12-adapter bill of materials (BOM)

37 components, 24 distinct parts.

QtyPartRefs
1
LDI1117-3.3H
U1
1
STM32G431CBUx
U2
1
TXS0102DCT
U5
1
24MHz
Y1
1
USB_B_Micro
J1
1
Conn_SWD
J2
1
SDI-12_OUT
J3
1
SDI12_POWER
J4
1
BOOTSEL
J5
1
RESET
SW2
1
RED_LED
D1
1
MM3Zxx
D2
1
USER_LED
D3
1
USER_LED_2
D4
4
1uF
C1, C2, C6, C8
7
100nF
C3, C4, C5, C7, C12, C14, C15
2
12pF
C9, C10
1
22nF
C11
3
xkΩ
R1, R6, R10
1
1.5kΩ
R2
Show 4 more
QtyPartRefs
1
2.2kΩ
R3
1
DNP
R4
2
510Ω
R7, R9
1
200kΩ
R8

Sdi12-adapter design files

The KiCad project lives in the z4ika/sdi12-adapter repository on GitHub; these links point at the commit this page was built from.

Sdi12-adapter: common questions

What microcontroller does the Sdi12-adapter use?

The Sdi12-adapter is built around the STM32G431CBUx, from the STM32 family.

How big is the Sdi12-adapter PCB?

The Sdi12-adapter measures 52.5 × 30.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Sdi12-adapter?

37 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Sdi12-adapter design files?

From the z4ika/sdi12-adapter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Sdi12-adapter design in my own project?

Yes, under the terms of its AGPL-3.0 license, which z4ika chose for the repository.

Can I test firmware for the Sdi12-adapter 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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