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Stm8s001rs485

TG9541·stm8s001rs485

Stm8s001rs485 PCB layout, top view — open source STM32 board by TG9541
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About the Stm8s001rs485 PCB

Stm8s001rs485 is an open source STM32 PCB design by TG9541, published on GitHub under the MIT license. It is a 2-layer board measuring 33.3 × 6.4 mm, with 20 components from 12 distinct parts.

Its main chip is the STM8S001J3M, from the STM32 family. Other key parts include the DS1621S, XC6206P332MR and SP3485CN. By type, the board carries 6 capacitors, 6 resistors, 4 ICs, 2 connectors and 2 diodes.

It belongs with the sensors designs in this gallery.

From the project

A narrow KiCad made PCB with STM8S001J3, RS485 driver and DS1621S Thermometer, e.g., for STM8EF-MODBUS

This KiCad project provides a small PCB with an STM8S001J3M3, a RS485 interface and a DS1621S temperature sensor. Applications include MODBUS with STM8 eForth.

Here is a photo of an assembled board, together with the RS485-CH340E dongle:

The STM8S001J3M3 is a member of the "STM8S Low Density" family that's based on the "STM8S Access Line" cross-breed STM8S903, which, compared with the STM8S003, has some (undocumented) features.

Stm8s001rs485, from the project README
From the project README

Main components on the Stm8s001rs485

DS1621SSTM8S001J3MXC6206P332MRSP3485CN

Stm8s001rs485 bill of materials (BOM)

20 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
DS1621S
U1
1
STM8S001J3M
U2
1
XC6206P332MR
U3
1
SP3485CN
U4
1
Conn_02x02_Odd_Even
J1
1
Conn_02x03_Counter_Clockwise
J2
1
LED red
D1
1
LED green
D2
3
100nF
C1, C3, C5
3
1uF
C2, C4, C6
5
4k7
R1, R2, R3, R5, R6
1
120R
R4

Stm8s001rs485 design files

The KiCad project lives in the TG9541/stm8s001rs485 repository on GitHub; these links point at the commit this page was built from.

Stm8s001rs485: common questions

What microcontroller does the Stm8s001rs485 use?

The Stm8s001rs485 is built around the STM8S001J3M, from the STM32 family.

How big is the Stm8s001rs485 PCB?

The Stm8s001rs485 measures 33.3 × 6.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Stm8s001rs485?

20 components, from 12 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 Stm8s001rs485 design files?

From the TG9541/stm8s001rs485 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Stm8s001rs485 design in my own project?

Yes, under the terms of its MIT license, which TG9541 chose for the repository.

Can I test firmware for the Stm8s001rs485 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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