Posts Tagged ‘sensor’

Cheap plant watering sensor

Friday, February 17th, 2017

A detailed instructions of how to design a cheap plant watering sensor from LuckyResistor: I have a couple of plants in flowerpots and this plants not only like some light, they also need water from time to time. Watering this plants is something I often forget, with sad results. There are ready...

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SDI-12 USB + Analog prototype

Saturday, November 5th, 2016

Liudr has designed and built a SDI-12 + Analog USB adapter. Project info at Liudr's blog.

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Adding a DHT22 temperature and humidity sensor to the Sonoff

Friday, June 24th, 2016

Mikey writes: Just a few days ago I replaced the firmware on my Sonoff, and immediately after, I wanted more… After looking on their website, I found a version which also had a DHT11 sensor attached, and I then wanted to do something similar, just with a DHT22 for higher...

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Posted in how-to | 1 Comment »

Freescale’s sensors breakout boards

Tuesday, January 19th, 2016

Freescale’s sensors breakout boards from Juan Ignacio Cerrudo: MMA8541Q, FXOS8700CQ, MPL3115A2 and Logic Level Converter: The MMA8451Q is a  low-power, three-axis accelerometer with 14 bits of resolution. It communicates over I2C,  has built in tilt/orientation detection and also tap detection. More details at ssihla site.

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Posted in DIY, PCBs | 2 Comments »

ZFM-20 fingerprint capture library

Friday, November 27th, 2015

Dilshan Jayakody  writes: This ZFM-20 fingerprint library is developed to capture and retrieve fingerprint images from the above sensor module. The main purpose of this library is to use ZFM-20 sensor with PC as low cost fingerprint capture unit and because of that, in-module fingerprint processing and verification functions are...

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Posted in library | 3 Comments »

Data logger deluxe version

Tuesday, September 15th, 2015

An update on LuckyResistor’s data logger project we covered previously: Just to let you know the deluxe version of the data logger is almost done. The hardware is ready and tested – currently I finish the menu based software for the data logger. Menu based control with 5 capacitive inputs...

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Simple pendulum tiltmeter

Friday, August 21st, 2015

Jbeale shared his tiltmeter project in the forum: Apparently the most popular sensor for this purpose is an "electrolytic tilt sensor", basically a bubble level with internal electrodes. These are not exactly consumer items. I tried building a simple pendulum tiltmeter using a split-photodiode, Optek OPR2100 (about $10 from Mouser)...

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Are my documents safe in the root cellar at ~80% humidity?

Thursday, August 20th, 2015

luckyresistor has been working on his Data Logger project: There is a large cellar where I could store unused items and documents, but the catch is the humidity there. It is a root cellar near a small brook and the humidity varies between 75% up to 90%. Archived material should...

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Posted in hacks | 4 Comments »

DirtyPCBs: HDC1000 temperature and humidity sensor breakout, with Arduino library

Tuesday, February 24th, 2015

Francesco Truzzi published a new build: a breakout board for the TI HDC1000, a tiny (8BGA) temperature and humidity sensor The boards were again fulfilled by DirtyPCBs, perfect for this kind of small projects. So here are the pictures of my board and here are the features: Address selection jumpers: ADR0...

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Posted in Arduino, | No Comments »

App note: Infrared gesture sensing

Saturday, February 14th, 2015

An application note from Silicon Labs on Infrared gesture sensing (PDF!): Touchless user interfaces are an emerging trend in embedded electronics as product designers seek out innovative control methods and more intuitive ways for users to interact with electronics. Active infrared proximity motion sensing can solve this challenge. Silicon Labs Si114x proximity...

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A Xively logger library for Spark Core

Monday, November 24th, 2014

Davide Gironi writes: Xively (formerly Cosm and before that Pachube) is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & buildings) to the Web and to build their own applications based on that data. This library is a modular and...

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Classic NES played using a Kinect

Monday, October 27th, 2014

Control your classic NES console with the Kinect V2 sensor by Paul DeCarlo: Ingredients: An NES console with game to test An NES controller OR some wiring skills and a CD4021BE 8-bit shift register 12 strands of wire, recommend Kynar 8 1k resistors (technically any value from 1k to 50k should...

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DirtyPCB NanoSeeker v2.1

Wednesday, October 22nd, 2014

Jon Hylands writes: So I built a board tonight, and its working (after removing and rotating one of the h-bridge chips I put on backwards). I've validated that micropython works on it, and I can turn on and off the four LEDs. I've also successfully paired my cell phone with...

Posted in, wireless | 1 Comment »

Measure brightness in Lux using BH1750 sensor on Spark core

Wednesday, September 24th, 2014

Davide Gironi writes: A library for the BH1750FVI IC. The BH1750 IC is a light intensity sensor module with built-in a 16 bit AD converter generating digital signal. With the BH1750 Light Sensor intensity can be directly measured by the luxmeter, without needing to make calculations. This library provides...

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Thermostat remote temperature sensor hack

Tuesday, September 16th, 2014

Alan Parekh of Hacked Gadgets writes: We all have thermostats in our houses but how often are they in a horrible place? You often want to place the temperature sensor in a different location than the control and display unit. There are lots of models that have remote sensor capability...

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Hard disk drive clock with Arduino Uno

Tuesday, September 9th, 2014

ACVoltage  wrote this instructable detailing his DIY POV clock using hard disk drive and Arduino Uno: This is a fun project that can be done easily and also cheaply. In this instructable we will explain step by step how to make this beautiful POV clock. Used material: -Arduino Uno, -Tiny RTC modul, -ULN 2003,...

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Posted in clock, DIY | No Comments »

Arduino ultrasonic range finder, with I²C lcd display

Tuesday, September 9th, 2014

An Arduino rangefinder with an ultrasonic sensor and an I²C interface display by Jan Henrik. He wrote an instructables here: The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20x4 chars big, it has a custom...

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Posted in Arduino, DIY, LCD | 1 Comment »

PIR sensor

Thursday, August 14th, 2014

An automatic PIR sensor project by Rajkumar Sharma of Electronics Lab: Project is based on Holtek’s IC HT7610A, which is a CMOS LSI chip designed for use in automatic PIR lamp, flash or buzzer control. It can operate in 3-wire configuration for relay applications. In our project we have used relay instead...

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Posted in security, sensors | No Comments »

Sensor stick project

Wednesday, April 30th, 2014

Elpis of Embedded Day shared his sensor stick in the project log forum: I just finish the assembly process of my latest super mini project! It's nothing amazing... but its a very handy sensor module! On board there are three commonly used sensors: SHT10, BMP085 and MPU6050. I was constantly...

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Reverse engineer wireless temperature / humidity / rain sensors, part 1

Monday, April 21st, 2014

Ray Wang writes: I just wrote a series of three posts about how I reverse engineered a few off-the-shelf wireless temperature, humidity sensors and rain gauge, and used an Arduino to listen to and decode the sensor data. The tools involved are quite simple: an Arduino and a 433MHz RF...

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Posted in Arduino, 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. 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...