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Si70xx/SHT2x : Temperature-Humidity Breakout Board

Breakout board compatible for Silicon Lab's & Sensirion's Temp-Humidity Sensor.

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Undoubtedly, Sensirion's SHT2x series is industry famous Temperature-Humidity sensor. Many of you might have used it in your projects.

Silicon Lab [Si70xx Series] also have similar range of digital sensor, with little cost difference compared to Sensirion's.

Thankfully, SHT2x & Si70xx are pin compatible and their footprints match perfectly to each other.

These sensors are best suited for applications like HVAC, Building/home Automation, Server centers, Weather data loggers.

This simple breakout board , allows you to easily integrate SHT2x/Si70xx sensor in your application.

Problem:

Well, Am from India. And, Hardware community isn't evolved as much here than, in other parts of the world.

I mean suppose while designing circuit, you choose particular IC, then you have to check whether the same IC is available in your nearest market. Another option is to order from outside the India. And if you find here,great, but still you have to pay way more. One simply cannot afford this while in prototyping.

Really-really Short Story:

It happens like that, For one of my Environment monitoring project, I needed SHT2x / Si70xx type sensor to be included in my design.

And it's really cool that both of the sensors are same size, shape, pin compatible.

Thanks to Silicon Labs, I ordered free sample of such sensor, and they arrived within a week.

Meanwhile, I had to do find way to mount this sensor chip, so I decided to design breakout board by myself.

Solution:

I designed Footprint for the device in EAGLE PCB, I couldn't find one.

I also want to use DIPtrace PCB design tool, so I choose it use here.

PCB designing is done in DipTrace.

Result:

This wasn't a tough design, I mean, How hard it will be to design PCB having circuit with just

-Two pullup Resistors

-One Cap

-4-Pin header

-Sensor footprint.

Work of an hour.

Useful Links:

SHT2x - Digital Humidity & Temperature Sensor (RH/T)

Si7006/13/20/21/34 I2C Relative Humidity and Temperature Sensors

V201_SI_SHT breakout.dip

DipTrace PCB Layout Files

dip - 45.14 kB - 02/09/2016 at 11:49

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V201_SI_SHT breakout.dch

DipTrace Schematics File

dch - 47.17 kB - 02/09/2016 at 11:49

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plain - 154.00 bytes - 02/09/2016 at 11:49

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  • 1 × SHT20 Sensirion Temperature Humidity Sensor
  • 1 × Si7006 Silicon Lab Temperature Humidity Sensor
  • 2 × 10KOhm [1206] SMD Resistor
  • 1 × 0.1uF [1206] SMD Capacitor
  • 1 × 0.1" 4- Pin Header

  • Upgraded Version

    Amar Potdar03/13/2016 at 13:02 0 comments

    Well, V2 is for couple of reasons.

    In earlier version I neglected the Board Cutout slot across sensor, which are quite important for Temp-Humidity Sensor.

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base wrote 02/03/2016 at 10:40 point

SHT21 looks pin/layout compatible, it's in the same price range (for single units @Farnell) and has a bit higher accuracy

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