Using Si7006 to read temperature and humidity

From the bitknitting blog:


Using the Si7006 to get temperature and humidity readings

I made a PCB with the Si7006 on it. This post is my bumblings encountered as I successfully got temperature and humidity readings from a Si7006 using the PCB I designed. In summary, the Si7006 is easy to work with. It is relatively easy to solder and very easy to access via I2C […]


The design files and source code are available on GitHub:



Using Si7006 to read temperature and humidity

Biomed Shield for Arduino 101

From Orlando Hoilett of Calvary Engineering on


Biomed Shield for Arduino 101

A sweet Arduino shield with a ton of cool sensors for physiological parameters such as heart rate and breathing rate

The features include:

  • Heart Rate Monitoring with the MAX30101
  • Pulse Oximeter with the MAX30101
  • Electrocardiogram, Electromyogram, and Electrooculogram with our Super Simple EXG Circuit
  • Bioimpedance with the AD5934
  • Body Temperature with the MLX90614
  • Ambient Light with a CdS Photocell
  • Ambient Temperature with a Thermistor

The design files and source code are available on GitHub:


Biomed Shield for Arduino 101

How to Design a Cheap Plant Watering Sensor


This is the third part of the meta-tutorial, where I talk about designing a cheap plant watering sensor. If you did not already read the first and second part, please do it now. These parts contain a lot information which lead to this point of the tutorial. The second part ended with step 14, designing a first prototype PCB.

via How to Design a Cheap Plant Watering Sensor (Part 3) — Lucky Resistor

How to Design a Cheap Plant Watering Sensor

Comprehensive Respiratory Health Monitor

279361444154700437.jpgDean Gouramanis is building a wearable Bluetooth-enabled Arduino Pulse Oximeter:

Comprehensive Respiratory Health Monitor

bluetooth-enabled wearable device can measure Pulse Oximetry, and ambient CO2 24/7

The board is shared on GitHub:

images11 dgouramanis/CRHM

Comprehensive Respiratory Health Monitor

Intel Quark D2000 Environmental Sensors Board

Sergey Kiselev created this small board, equipped with a low power Intel Quark D2000 microcontroller and several sensors:

Intel Quark D2000 Environmental Sensors Board

The board can be used to monitor the environment conditions, and store or transmit the data to a remote system for further processing.
The Intel Quark D2000 microcontroller contains:
  • 32-bit x86 processor core
  • 25 GPIO pins
  • Support for UART, PWM, I2C, SPI, JTAG
  • 32 KiB of the instruction Flash ROM
  • 8 KiB of the SRAM
The on-board sensors include:
  • Accelerometer and Magnetometer
  • Atmospheric Pressure, Humidity and Temperature Sensor
  • Ambient Light Sensor

Serge has shared the board on OSH Park:

Order from OSH Park
Intel Quark D2000 Environmental Sensors Board

PiAQ: Open Source Indoor Air Quality Sensor

UPDATE 2016-10-24: Dave Conroy of CRT Labs will present the PiAQ tonight at Chicago hackerspace Pumping Station: One


National Association of Realtors’ CRT Labs in Chicago has developed a Raspberry Pi HAT to make information about the air people are breathing more accessible:


The PiAQ

Open Source Indoor Air Quality Sensor for Raspberry Pi

Measurement Points:

  • Temperature (SHT31)
  • Relative Humidity (SHT31)
  • VOC (Volatile Organic Compounds) (IAQ Core)
  • Derived CO2 (IAQ Core)
  • Barometric Pressure (MPL3115A2)
  • Light Intensity (TSL2561)
  • CO Concentration (MiCS-4154)
  • NO2 Concentration (MiCS-4154)
  • Sound Intensity (ADMP401)



  • FSK (RFM69HW 433/915MHz)
  • WiFi (Particle Photon)
  • Cellular (Particle Electron) (Coming soon)
  • LoRa (Coming Soon)

Authors and Contributors

Schematics and Eagle CAD Files are on GitHub:

github NationalAssociationOfRealtors/PiAQ

CRTLabs has shared the board on OSH Park:


Order from OSH Park

PiAQ: Open Source Indoor Air Quality Sensor

Garage Parking Sensor Board

Chip McClelland created this visual aid for parking in a two car garage:


Garage Parking Sensor Board

Let’s face it, garages are simply never big enough. There is always more you want to put into a garage than will fit and once you park your cars, things get tighter still. To get the most out of this space, your car needs to be parked correctly everytime. That is what this little device seeks to do.

chipmc has shared the board on OSH Park:

Garage Parking Sensor Board

Order from OSH Park

Garage Parking Sensor Board