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Placebo

dotcypress·placebo

Placebo PCB layout, top view — open source STM32 board by dotcypress
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About the Placebo PCB

Placebo is an open source STM32 PCB design by dotcypress, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 19.1 × 29.1 mm, with 14 components from 10 distinct parts.

Its main chip is the STM32G0xxFx, from the STM32 family. Other key parts include the AP7370-33W5-7 and PlaceboConnect. By type, the board carries 5 capacitors, 4 resistors, 3 ICs, 1 connector and 1 diode.

From the project

Truly minimal STM32G0/STM32C0 prototyping board

Truly minimal STM32G0/STM32C0 proto board.

Breadboard/Perfboard friendly Power line bypass capacitors Reset circuit Tag-Connect TC2030-CTX-NL programming connector Optional battery connector with LDO Optional configurable LED

1. Install rustup by following the instructions at https://rustup.rs 2. Install Cortex-M0, M0+, and M1 (ARMv6-M architecture) target: rustup target add thumbv6m-none-eabi 3. Install LLVM tools: rustup component add llvm-tools-preview 4. Install cargo-binutils: cargo install cargo-binutils (Note: on some Linux distros (e.g. Ubuntu) you may need to install the packages…

Placebo, from the project README
From the project README

Main components on the Placebo

AP7370-33W5-7STM32G0xxFxPlaceboConnect

Placebo bill of materials (BOM)

14 components, 10 distinct parts.

QtyPartRefs
1
AP7370-33W5-7
U1
1
STM32G0xxFx
U2
1
PlaceboConnect
U3
1
TagConnect
J2
1
SML-D12W8WT86A
D1
3
10uF
C1, C2, C4
2
100nF
C3, C5
1
10K
R1
1
470R
R2
2
DNP
R3, R4

Placebo design files

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

Placebo: common questions

What microcontroller does the Placebo use?

The Placebo is built around the STM32G0xxFx, from the STM32 family.

How big is the Placebo PCB?

The Placebo measures 19.1 × 29.1 mm, has 2 copper layers and is 0.2922 mm thick.

How many components are on the Placebo?

14 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the Placebo design files?

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

Can I use the Placebo design in my own project?

Yes, under the terms of its Apache-2.0 license, which dotcypress chose for the repository.

Can I test firmware for the Placebo 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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