A DIY Arduino-based poultry egg incubator with humidity sensor @ reuk.co.uk. Neil writes: This device makes use of an always on motor which turns the eggs six full turns every 24 hours. Many of our other incubators have motors which have to be set up to run for a certain length of time a certain […]
Tag Archives: sensor
How to make analog sensor readings with digital I/O pins
Edward Mallon wrote an article describing a technique he used to make analog sensor readings with digital I/O pins: Will this method replace our pin-toggled oversampling? Perhaps not for something as simple as a thermistor since that method has already proven itself in the real world, and I don’t really have anything better to do […]
BMP180 based USB atmospheric pressure monitor
Dilshan Jayakody published a new build: We initially developed this USB atmospheric pressure monitor to study some operating characteristics of Bosch BMP180 sensor. BMP180 is low cost sensor to measuring barometric pressure and temperature. According to the data sheet this sensor can use to measure pressure ranging between 300hPa to 1100hPa. This sensor is introduced […]
Arduino Tutorial: Adding sensors to your data logger
Edward Mallon writes: This post isn’t another How-To tutorial for a specific sensor because the Arduino community has already produced a considerable number of resources like that. You’d be hard pressed to find any sensor in the DIY market that doesn’t give you a dozen cookbook recipes to follow after a simple Google search. In […]
How to configure I2C sensors with Arduino
Edward Mallon writes: I’ve spent the last year in the ‘uncanny valley’ of the Arduino. That’s the point where you understand the tutorials at Arduino.cc, but still don’t get much from the material on gitHub because trained programmers would never stoop to using the wire.h library when they could just roll their own in native […]
Build an open source laser reflection barrier
Boris Landoni from Open Electronics writes about an open source project laser reflection barrier: It allows us to detect the presence and passage of an object thanks to the combination of a laser diode which emits a light ray and a phototransistor which detects reflected light. Robotics applications and industrial control systems normally make use of optical […]
Cheap plant watering sensor
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 made solutions for this, but […]
SDI-12 USB + Analog prototype
Liudr has designed and built a SDI-12 + Analog USB adapter. Project info at Liudr’s blog.
Adding a DHT22 temperature and humidity sensor to the Sonoff
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 resolution (0.1C on a DHT22, […]
Freescale’s sensors breakout boards
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.
ZFM-20 fingerprint capture library
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 not implemented in this library. […]
Data logger deluxe version
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 Record, view records, send records […]
Simple pendulum tiltmeter
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) and LF411 opamp. The pendulum […]
Are my documents safe in the root cellar at ~80% humidity?
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 never be exposed to humidity […]
DirtyPCBs: HDC1000 temperature and humidity sensor breakout, with Arduino library
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 and ADR1 are tied to […]
App note: Infrared gesture sensing
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 and ambient light sensor products […]
A Xively logger library for Spark Core
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 configurable Xively data logger, built […]
Classic NES played using a Kinect
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 suffice) 2 3.6k resistors (again […]
DirtyPCB NanoSeeker v2.1
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 the bluetooth module on the […]
Measure brightness in Lux using BH1750 sensor on Spark core
Davide Gironi writes: A Spark.io 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 function to measure lux through […]