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Archive for the ‘sensors’ Category

Lift: Millimeter-level finger tracking with Arduino and light sensors

Friday, April 21st, 2017

Researchers at the UC Irvine and the FX Palo Alto Laboratory present Lift, a visible light-enabled finger tracking: By projecting encoded visible patterns onto an object’s surface (e.g. paper, display, or table), and localizing the user’s fingers with light sensors, Lift offers users a richer interactive space than the device’s...

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Posted in Arduino, sensors | No Comments »

Bridge monitoring system using wireless sensor network

Thursday, April 13th, 2017

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...

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Posted in sensors, wireless | 1 Comment »

Making the Electronics for a 24GHz doppler motion sensor

Tuesday, April 4th, 2017

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...

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An open source Rain Sensor and controller

Thursday, January 26th, 2017

Boris Landoni from Open Electronics writes about a new open source Rain Sensor and controller: Designed to be coupled to an irrigation controller, a weather station or motorized curtains and rolling shutters, it shuts down a relay when rain is detected. Full details at Open Electronics project page.

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Posted in open source, sensors | 1 Comment »

A high-resolution sensor node

Saturday, December 31st, 2016

A high-resolution sensor node from JeeLabs: The JeeNode Zero is intended as sensor node in a Wireless Sensor Network. This requires: a sensor we can read out periodically, such as the BME280 being able to sleep with a very low current, as recently described the ability to run the node...

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Ultrasonic parking sensor

Tuesday, December 20th, 2016

An ultrasonic parking sensor project from Ch00ftech: After electing to use the PING))) sensor exactly as directed, I needed to build the rest of my circuit.  I wanted to build something robust that would mount nicely on the wall of my dad's garage.  Figuring that the sensor would likely need to...

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

Friday, December 16th, 2016

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...

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Posted in sensors | 2 Comments »

CO2, temperature and humidity monitor

Tuesday, September 13th, 2016

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...

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Posted in PIC, sensors | No Comments »

Developing smart sensor solutions

Wednesday, May 11th, 2016

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...

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Posted in MSP430, sensors | No Comments »

OpenGarage, an Open-source WiFi garage door opener

Wednesday, March 16th, 2016

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...

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Posted in sensors, wireless | No Comments »

A DIY wearable posture sensor

Wednesday, March 9th, 2016

Want to improve your posture? This wearable posture sensor from Coretech Robotics will remind you whenever you slouch and help you maintain a good posture: Posture sensors/monitors have been a recurring theme on this blog. They are supposed to remind you of your posture and prevent you from slouching, which...

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Posted in DIY, sensors | No Comments »

‘Magic tree’ project

Thursday, February 11th, 2016

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...

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INA219 current sensor DIY Breakout board

Friday, January 1st, 2016

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...

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Testing the Shinyei PPD42NS

Tuesday, August 18th, 2015

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...

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Posted in Arduino, sensors | 5 Comments »

TinySensor server

Wednesday, July 1st, 2015

Steve's TinySensor server project, that is available at Github: Well after almost a year I decided it was time to update this project with improvements to both its hardware and software. On the hardware side, the server is still the original Raspberry Pi model B, but I've mounted the nRF24L01+ radio...

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Posted in R-Pi, sensors | No Comments »

DIY compost sensor

Friday, June 26th, 2015

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...

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Posted in measurement, sensors | 1 Comment »

TI Design Contest: Envision the ultimate NFC wearable

Saturday, June 13th, 2015

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...

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Posted in contest, RF, sensors, wireless | 3 Comments »

TI’s CC2650 SensorTag gets three new exciting DevPacks

Friday, June 5th, 2015

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,...

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ESP8266 + DS18B20 Temperature sensor sends data to Thingspeak.com

Thursday, May 28th, 2015

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...

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Posted in how-to, sensors, wireless | 2 Comments »

Uber home automation

Thursday, May 21st, 2015

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.

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Posted in Arduino, sensors, wireless | 1 Comment »

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Recent Comments

  • Edward Mallon: I've managed to get cheap thermistors calibrated to about to +/- 0.2C with 3.3v Arduinos. https://edwardmallon.wordpress.com/2017/04/26/calibrating-oversampled-thermistors-with-an-arduino/ Instead of playing whack-a-mole with the various sources of...
  • Ja: What the keyer do? Sends random morse code or there is some input? If someone can point me to some source to read I would...
  • Sorin: Pleasure of free!
  • hli: Sunday++
  • Max: Jolly good stuff, although the "include 100 W resistors in series with the inputs and outputs" part is quite hilarious until one realizes* they meant...