Bridge monitoring system using wireless sensor network

Zx Lee and his friends built the bridge monitoring system using wireless sensor network, that is available at github: Recently, I completed a mini project together with two of my friends. So I am going to take this opportunity to share the project that we have made, we named it the Bridge Monitoring System (BMS) […]

Making the Electronics for a 24GHz doppler motion sensor

Limpkin has a nice write-up on his tiny CDM324 Doppler speed sensor: You may recall the article I wrote a couple of years ago about a nearly identical Doppler sensor, the HB100. While the HB100 is using a 10.525GHz frequency, this new module uses 24.125GHz! This has the main advantage of being compatible with European […]

Intel(r) Quark(tm) micrcontroller D2000 based Environmental sensors board

Sergey Kiselev designed and built an Intel Quark D2000 micrcontroller based Environmental sensors board: This is a fairly small (51 x 51 mm) board, equipped with a low power Intel Quark D2000 microcontroller, and several sensors (accelerator, temperature, humidity, atmospheric pressure), as well as a mikroBUS compatible header and a Grove compatible connectors, that can be […]

CO2, temperature and humidity monitor

An open source CO2 monitoring project from Roving Dynamics: The project described below uses a MH-Z16 or MH-Z19 CO2 sensor and a DHT-22 (or DHT-11 if less accuracy is required) to measure the Temperature and Humidity. It has a 4 line by 20 character LCD Display to show the current readings and status, a warning alarm […]

Developing smart sensor solutions

Ken Boak has published a new build, the MSP430i2041 bluetooth smart sensor board: One of our existing products at work, which I designed about 2 years ago, makes use of the STM32F373 microcontroller interfaced to an AD7767 24-bit sigma-delta ADC, to create a smart sensor. Whilst at the time of development, (Feb 2014) – this seemed to […]

OpenGarage, an Open-source WiFi garage door opener

Ray Wang has published a new project called OpenGarage, an open-source garage door opener based on ESP8266 and the Blynk app: Today I am very excited to introduce you to OpenGarage — an open-source, universal garage door opener built using the ESP8266 WiFi chip and the Blynk app. I’ve wanted to finish this project for a […]

‘Magic tree’ project

Dilshan Jayakody has published a new build, a ‘Musical trees’: “Musical trees” is a part of creative arts installation and this project is capable to produce different audio tones by detecting human touch to its attached plants. Existing version of this driver is capable to monitor 8 plants and produce different sounds for each plant. […]

INA219 current sensor DIY Breakout board

A INA219 current sensor DIY Breakout board project from Juan Ignacio: Another small board, this time for a INA219. The INA219 is a high-side current shunt and power monitor with an I2C interface. For testing I used Rei VILO library with a MSP430G2553 and Energia, and I measured the power consumption for this simple circuit. Project info […]

Testing the Shinyei PPD42NS

From the comments on our Arduino dust sensor post,  KH writes: The sensor can obviously measure dust concentrations, it also has to be placed and set up properly, and it gives useful readings. For hobby users like most of us, obviously calibration to specific or absolute standards will be almost impossible. More details at Darell […]

DIY compost sensor

Kinasmith wrote this instructable detailing how to build a compost temperature monitoring system, a web connected wireless sensor network: Why Measure the Temperature of Compost? “Composting is the biological decomposition of organic matter under aerobic conditions.” Micro-organisms consume organic material and oxygen and create heat as a waste product. By measuring this heat you can predict […]

TI Design Contest: Envision the ultimate NFC wearable

TI has announced a contest for NFC based wearable designs. Do you dream of creating a solution to make monitoring health and fitness activities easier? Using near field communication (NFC) in your designs can help! We want to hear your ideas for the next wearable design based on our RF430FRL15xH NFC sensor transponder in our […]

TI’s CC2650 SensorTag gets three new exciting DevPacks

Gerard over at 43oh has written up an article on TI’s three new development kits for the new CC2560STK – Audio, watch and debug development packs: A while back I wrote about the new SensorTag CC2650STK which comes with four more sensors than the previous CC2541 SensorTag. While looking through the TI’s SensorTag page, I noticed three new development […]

ESP8266 + DS18B20 Temperature sensor sends data to Thingspeak.com

Mohamed Afzal has written an article detailing how to send data to Thingspeak.com with ESP8266 + DS18B20 temperature sensor: The stock Firmware in the ESP8266 supports AT commands and for communicating with this need an micro-controller like Arduino. But i want to make a simple solution for that without using external micro-controller. NodeMCU firmware was the best thing […]

Uber home automation

Eric of ElectronicHamsters wrote an article detailing his Uber home automation project:  garage door sensor, battery powered mailbox sensor or door monitor, multi sensor, laundry room washer-dryer notifier, prototype of dog tracker, garage genie and remote control, smart mouse trap. Project info at ElectronicHamsters project page. Check out the project instructables here.

Interfacing PIR sensor to 8051 microcontroller

Praveen from CircuitsToday has written up an article on interfacing PIR sensor to 8051 microcontroller: PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also included at the end of this article. Before going in […]