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Sht45-qt

FrancoSpitale·sht45-qt·hardware/sht45-qt.kicad_pcb

Sht45-qt PCB layout, top view — open source board by FrancoSpitale
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About the Sht45-qt PCB

Sht45-qt is an open source PCB design by FrancoSpitale, published on GitHub under the MIT license. It is a 2-layer board measuring 25.4 × 20.3 mm, with 7 components from 5 distinct parts.

Other key parts include the SHT45-AD1B-R2. By type, the board carries 3 connectors, 2 resistors, 1 IC and 1 capacitor.

It belongs with the sensors, dev boards & breakouts and power & battery designs in this gallery.

From the project

SHT45 temperature/humidity breakout, Qwiic/STEMMA QT compatible — KiCad 9, open hardware (MIT)

A small open-source breakout for the Sensirion SHT45 (±1.0 % RH, ±0.1 °C) with Qwiic / STEMMA QT connectors, designed in KiCad 9. 25.4 × 20.3 mm, 2 layers, ready to fabricate at JLCPCB (gerbers included).

Schematic: docs/schematic.svg · Source: hardware/

- Sensirion SHT4x family (SHT40 / SHT41 / SHT45 are drop-in compatible, same DFN-4 footprint) - Two JST SH 4-pin (Qwiic/STEMMA QT) connectors for daisy-chaining, plus a 0.1" GND · 3V3 · SDA · SCL header for breadboards - I²C address 0x44 (fixed by the chip) - 10 k I²C pull-ups with a cuttable solder jumper (JP1) - Thermally isolated sensor…

Sht45-qt, from the project README
From the project README

Main components on the Sht45-qt

SHT45-AD1B-R2

Sht45-qt bill of materials (BOM)

7 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SHT45-AD1B-R2
SHT45-AD1B
U1
2
SM04B-SRSS-TB(LF)(SN)
Qwiic
J1, J2
1
I2C_HEADER
I2C_Header
J3
1
CL10B104KB8NNNC
100nF
C1
2
RC0603FR-0710KL
10k
R1, R2

Sht45-qt design files

The KiCad project lives in the FrancoSpitale/sht45-qt repository on GitHub; these links point at the commit this page was built from.

Sht45-qt: common questions

How big is the Sht45-qt PCB?

The Sht45-qt measures 25.4 × 20.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sht45-qt?

7 components, from 5 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 Sht45-qt design files?

From the FrancoSpitale/sht45-qt 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 Sht45-qt design in my own project?

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

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