DHT11 e DHT22 sensors - Measuring temperature and humidity

DHT11 and DHT22 sensors – Measure humidity and temperature with Arduino

The DHT11 sensor (and the DHT22 sensor) allows you to measure both the temperature and the level of humidity in the air. Available on the market for a few euros, we find it already mounted on electrical boards that greatly facilitate its use. Let’s see in this article how easy it is to connect this sensor to our Arduino and how to take measurements..

Arduino - Servo Motors, how they work and how to control them

Arduino – Servo motors, how they work and how to control them

Servo motors are a particular type of motor, which thanks to their characteristics and ease of use, are often used in the first examples of motor control on boards such as Arduino or Raspberry. Model making makes a lot of use of this type of motors and there are many low-cost servo motors available on the market, also useful for educational purposes. In this article we will first see what servo motors are, how to use them and finally how to program Arduino in order to use them with some simple examples.

The EEPROM on Arduino - read and write data permanently

The EEPROM on Arduino – read and write data permanently

EEPROMs, which are the acronym for Electrically Erasable Programmable Read-Only Memory, are special microchips used to store data even after the device on which they are mounted has been turned off. The next time it is turned on, the device will then have data available to be loaded. That is, they are memory devices that, unlike RAM, are able to keep information inside them even after the power supply has been turned off.

Generate musical tones at 440 Hz and 432 Hz with Arduino

Generate musical tones at 440Hz and 432Hz with Arduino

There is a lot of talk about musical scales, of music at 440Hz and 432Hz without at times understanding the meaning of it. In this article we will see how to generate musical scales, the theory behind them, and how to create music at 440Hz or 432Hz. We will do it all using an Arduino board, and a small speaker (or buzzer).

Geiger Counter - Measuring radiation levels with Arduino

Geiger Counter – Measuring Radiation Levels with Arduino

Going back to the old boards that I found in a box, I found this Geiger counter perfectly functional to be interfaced as a shield to Arduino. In this article we will see its features together, and at the same time better understanding what a Geiger counter, or radiation sensor, is and how it works.

Arduino and the WiFi101 Library

Programming WiFi on Arduino with the WiFi101 library

The WiFi101 library allows you to programmatically use WiFi technology on Arduino systems powered by Arduino WiFi Shield 101 or directly using the Arduino MKR1000 board that has integrated WiFi. Needless to say, this library is one of the key building blocks for the development and use of Arduino as a IoT solution.

adafruit circuit playground - a new arduino compatible wearable board main

Adafruit Circuit Playground – a new Arduino compatible wearable board

On the big stage of the Arduino and Arduino-compatible electronic boards there is a new protagonist: Circuit Playground. This board is developed and distributed by Adafruit, and its name is very meaningful….this board is a “playground” for all makers.

In fact, it contains all the features of an Arduino LilyPad board, such as flexibility for wearable designs, but at the same time contains some electronic components (such as multicolored Led, buttons and light, sound and temperature sensors). With these components already integrated, you can create your projects and test them with only this board. Let’s look at it in more detail in this article.