Sensor – Transducer – Detector Projects

Ultrasonic range-finder with haptic feedback

Introduction “An ultrasonic range-finding hat with variable haptic feedback for obstacle detection.” -Project Sound Bite For our ECE 4760 final project, we designed and implemented an ultrasonic range-finding hat that uses haptic feedback to alert its wearer about obstacles in his or her path. The hat is equipped with an ultrasonic transmitter/receiver circuit, which is […]

Ultrasonic range-finder with haptic feedback Read More »

Capacitive Touch with Atmel’s AT42QT1070 Touch Sensor IC

Rather than using an out-of-the-box capacitive touch solution for my projects, I thought I’d attempt making my own little breakout board. The idea is to use a sensor capable of triggering normal digital input pins using touch. This post covers the selected touch sensor IC, the circuit used, getting a custom PCB made and how

Capacitive Touch with Atmel’s AT42QT1070 Touch Sensor IC Read More »

An optical dust meter that uses the GP2Y1010AU0F sensor library made with AVR Atmega

This project is a dust detector that use the GP2Y1010AU0F sensor. Attached you can also find the GP2Y1010AU0F sensor library for AVR Atmega.GP2Y1010AU0F is a dust sensor by optical sensing system. An infrared emitting diode (IRED) and an phototransistor are diagonally arranged into this device. It detects the reflected light of dust in air. Especially,

An optical dust meter that uses the GP2Y1010AU0F sensor library made with AVR Atmega Read More »

AVR Atmega dehumidifier controller board, update

This project is an update to the previous dehumidifier based you can here: http://davidegironi.blogspot.it/2013/04/avr-atmega-dehumidifier-controller.html This update adds some usefull functions. The main issue that i’ve fixed is the microcontroller crash, that happens sometimes. I’ve noticed that sometimes the controller stop running, crash or doesn’t works as expected. After some experimets, i’ve noticed that probem was due

AVR Atmega dehumidifier controller board, update Read More »

A web configurable Xively logger, build on AVR ATmega328

Xively (formerly Cosm and before that Pachube) is a platform devoted to simplifying the interconnection of devices and data with applications on the Internet of Things. It 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

A web configurable Xively logger, build on AVR ATmega328 Read More »

Cheap CO2 meter using the MQ135 sensor with AVR ATmega

Cheap CO2 meter using the MQ135 sensor with AVR ATmega

MQ135 is an Air Quality Sensor suitable for detecting of NH3, Alcohol, Benzene and other gases. The description below, is what i derive from the poor datasheet of this sensor, it may be uncorrect, so if you have suggestions please leave me a feedback. The “sensitivity characteristics of the MQ-135” figure of the datasheet, you

Cheap CO2 meter using the MQ135 sensor with AVR ATmega Read More »

How to Interface an External EEPROM with AVR Atmega32

In this article, we will explain how to communicate to an external EEPROM from the AVR Atmega32 MCU using the I2C communication protocol. So let’s begin our tutorial on how to interface an EEPROM (AT24C16A) with AVR Atmega32.You will usually need an external EEPROM when your system has a certain set of user configurable settings

How to Interface an External EEPROM with AVR Atmega32 Read More »

Scroll to Top