Color sensor on Arduino UNO

How to detect colors with a color sensor and the Arduino

With a color sensor you teach your Arduino to distinguish between different colors. Most sensors can’t detect subtle differences – but they’re enough to detect the colors of M&Ms or Skittles, for example! Here you will learn how to connect a color sensor, use it to detect colors and convert …

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Arduino Weather Forecast

Arduino Weather Forecast

A weather station with current values is one thing – but knowing what the weather will be like in a few hours is quite another. In this project you create a simple weather forecast with the air pressure sensor BMP180 and a servo. Honestly, this project can’t keep up with …

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Arduino Analog Thermometer

Arduino Analog Thermometer

With a simple temperature sensor and a servo motor you can create an analog thermometer in minutes. The “needle” of the servo shows you the temperature between 10°C and 30°C on a template. For this project you need: Arduino Board (we use a Uno here) 1 or 2 breadboard(s) – …

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Arduino Theremin with A minor pentatonic

An Arduino Theremin with fixed scale

In this project you will learn how to create a simple Arduino Theremin with a piezo buzzer and the HC-SR04 ultrasonic sensor. But that’s not all – so that even inexperienced musicians can inspire their friends, this theremin only plays tones within a scale you define. In the following we …

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Arduino Nano 33 BLE Sense and Edge Impulse

Connect your Arduino Nano 33 BLE Sense with Edge Impulse

With Edge Impulse, you can easily collect sensor data, develop AI models from it, and put them back on a microcontroller. The perfect companion for this is the Arduino Nano 33 BLE Sense – not only does it have suitable sensors directly on the board, but it is also capable …

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Measuring temperature with the TMP36

Measuring temperature with the TMP36

The Arduino offers a variety of ways to measure the temperature of a room or object. This tutorial is about one of the best known and simplest sensors: The TMP36 – an inexpensive sensor with which you can easily measure the ambient temperature. The temperature sensor TMP36 The measuring range …

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Sound Sensor on Arduino

How to use a sound sensor with the Arduino

A sound sensor – or noise sensor – is a classic among sensors. In this tutorial you will learn how to connect the popular KY-037* and use it to process sounds both with the Arduino. Components of the Sound Sensor The most important parts of the noise sensor you will …

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The alcohol sensor-MQ-3 on the Arduino

How to connect and use the alcohol sensor MQ-3

With the sensor MQ-3* you can measure how much ethanol is in the air – e.g. in the exhaled air. However: you cannot determine the alcohol level of a test person and whether she is still able to drive. Likewise, you do not get absolute values, but only a relative …

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cover temperature warning

Monitor the temperature with Telegram and an ESP8266

In this project you monitor the temperature with a sensor and your ESP8266. As soon as a certain temperature defined by you is exceeded, your microcontroller sends a message to your Telegram bot. This project is the second part of a series: In terms of content it is set up …

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request temperature

Request the current temperature with Telegram

In this project you use Telegram to contact your ESP8266 to check the current temperature. As soon as your ESP8266 receives your request, it requests the current temperature from the BMP180 sensor and sends it to your smartphone. This project is the third part of a series and builds up …

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Ultrasonic sensor HC SR04 mounted on the Arduino

How to measure distances with the HC-SR04

With the affordable HC-SR04 ultrasonic sensor you can easily measure smaller distances and detect obstacles. The advantages of this sensor are obvious: It is inexpensive, installed in no time at all and delivers reliable results. Setup & Function The HC-SR04 sensor is quickly installed and connected: Supply it with 5V …

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Infrared Thermometer

How to measure the temperature by infrared with the GY-906

With most sensors you can measure the temperature of the environment – one step further is the GY-906: This sensor measures the temperature of an object from a distance via infrared.And it also measures the ambient temperature at the same time. 🙂 In this tutorial you will learn how to …

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motion detector with arduino

How to connect the HC-SR501 motion detector to the Arduino

If you want to detect motion, e.g. to switch on the light, the motion detector HC-SR501 (also called PIR for “passive infrared sensor”) is often a sufficiently good and inexpensive choice. Primarily, this sensor reacts to heat in the form of infrared rays. To prevent the radiator from switching on …

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Barometer

Measure air pressure & temperature with the BMP180

There are some temperature sensors on the market, like the well-known TMP36*, the GY-906* (which measures by infrared) or of course the DHT11* (or its more accurate brother DHT22*). Both of them also measure humidity. However, the BMP180* measures not only the ambient temperature but also the air pressure, which …

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Silent Alarm with Telegram and the ESP8266

A silent alarm with Telegram and an ESP8266

In this project you create a motion detector that sends you a message when someone moves in front of it. In principle, this is a silent alarm– an alarm system that does not make any noise but discreetly tells you that something is in progress. The sensor HC-SR501 is used …

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