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Fug

bboe·fug

Fug PCB layout, top view — open source ESP8266 board by bboe
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About the Fug PCB

Fug is an open source ESP8266 PCB design by bboe, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 36 × 57 mm, with 10 components from 8 distinct parts.

Its main chip is the WEMOS_D1_mini, from the ESP8266 family. Other key parts include the 1-101625-10. By type, the board carries 4 capacitors, 3 resistors, 2 ICs and 1 test point.

It belongs with the sensors designs in this gallery.

From the project

Carrier PCB joining a WEMOS D1 Mini (ESP8266) to a Sensirion SCD30 CO2/RH/T sensor. Script-generated KiCad.

A small carrier PCB that joins a WEMOS/LOLIN D1 Mini (ESP8266) to a Sensirion SCD30 CO₂ / humidity / temperature sensor over I²C. Both modules socket in and lift out. 36 × 57 mm, two layers.

Fug is British English for the stale, stuffy, close air of a room that's been shut up too long with too many people in it.

That's precisely what this board detects. Rising CO₂ is the thing you feel as a headache and a fading attention span an hour before you think to open a window — outdoor air sits near 420 ppm, a closed meeting room reaches 1500 ppm easily, and somewhere past that you stop thinking…

Main components on the Fug

1-101625-10WEMOS_D1_mini

Fug bill of materials (BOM)

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

QtyPartRefs
1
1-101625-10
SCD30
U1
1
WEMOS_D1_mini
U2
1
TestPoints
TP1
1
100uF
C1
2
100nF
C2, C4
1
10uF
C3
2
10k
R1, R2
1
470
R3

Fug design files

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

Fug: common questions

What microcontroller does the Fug use?

The Fug is built around the WEMOS_D1_mini, from the ESP8266 family.

How big is the Fug PCB?

The Fug measures 36 × 57 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fug?

10 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 Fug design files?

From the bboe/fug 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 Fug design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which bboe chose for the repository.

Can I test firmware for the Fug without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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