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Category Archives: Arduino

MAX038 function generator

Posted on February 23, 2016 by R-B Leave a comment

Milen posted this Instructable on the design of a MAX038 function generator that also implements an Atmega328 and an LCD to display the parameters. The function generator is very useful tool for the electronics freaks. It is needed for tuning resonance circuits, testing audio and video equipment, designing of analog filters and for many other different purposes. Today there are two main types of function generators ; digital, (DSP based, DDS…) which are more and more often used and analog, which were the origins. Both types have their advantages and disadvantages. The digital generators can generate signals with very stable

Arduino Infrared thermometer

Posted on February 2, 2016 by R-B Leave a comment

educ8s.tv has posted another great video tutorial on building an Arduino infrared thermometer using the MLX90614 Infrared temperature sensor, which uses the standard I2C protocol to communicate with the Arduino. The measured temperature is displayed on a Nokia 5110 LCD display shield. The device can measure the temperature of an object without any physical contact and with just facing the sensor toward it from a small distance. It can measure temperatures from -70 degrees Celsius to 380 degrees with an of about 0.5 degree at room temperature. Demo video showing it in action.

Advanced Arduino data logger

Posted on January 17, 2016 by R-B Leave a comment

educ8s.tv has posted a video tutorial on building an advanced Arduino data logger that records temperature, humidity, barometric pressure, and ambient light intensity on a micro SD storage card. It uses some easily available sensors, like DHT22, BMP180, and BH1750, for sensing the surrounding environment and the DS3231 RTC module for time-stamping the measurements. The tutorial describes in steps how to setup the complete project on a breadboard. The data logger runs for about 2 weeks using simple AA batteries and the data are stored on the SD card in a .csv file for easy transport to PC for further processing.

Arduino Crowtail and Easy Pulse Plugin

Posted on January 1, 2016 by R-B One comment

Arduino Crowtail is a modular and ready-to-use building block set from Elecrow for rapid prototyping with Arduino. It consists of a base Arduino Uno shield to which various sensor and I/O modules can be conveniently interfaced through standardized connectors. In this example, I am going to illustrate how to use the Easy Pulse Plugin sensor with a Crowtail base shield and a Crowtail OLED module to make a stand-alone pulse meter.

Speech recognition using Arduino and BitVoicer Server

Posted on December 8, 2015 by R-B Leave a comment

Marcio Yamagushi illustrates in this example how to use Arduino with the BitVoicer Server in order to implement speech recognition in your Arduino Project. In his demo, he controls multiple LEDs with voice commands. The following procedures will be executed to transform voice commands into LED activity: Audio waves will be captured and amplified by the Sparkfun Electret Breakout board; The amplified signal will be digitalized and buffered in the Arduino using its analog-to-digital converter (ADC); The audio samples will be streamed to BitVoicer Server using the Arduino serial port; BitVoicer Server will process the audio stream and recognize the speech

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