Microcontroller

Bosch BME688 4 in 1 Environmental Sensor The Bosch BME688 is the world’s first 4 in 1 environmental sensor that uses artificial intelligence to adapt the sensor with regards to your use case. The BME688 is the further development of the BME680 and measures the barometric pressure, temperature, humidity, and different gases. Link Picture Table … Read more

HC-SR501 PIR Motion Sensor for Arduino, ESP8266 and ESP32 The HC-SR501 PIR Motion Sensor is an infrared sensor that is able to detect motions. In this tutorial, I show you how the functionality of the HC-SR501 with the help of the schematic of the PCB. We discuss all three adjustment options before you see how … Read more

Active and Passive Buzzer for Arduino, ESP8266 and ESP32 In this tutorial you learn how active and passive buzzer work and the differences between both buzzers. After we create a full circuit along with a NPN MOSFET and flyback diode and Arduino, ESP8266 or ESP32 microcontroller, we program a sound example for the active buzzer … Read more

Sound Sensor Tutorial for Arduino, ESP8266 and ESP32 In this tutorial you learn everything about the KY-038 and KY-037 microphone sound sensor modules. After the technical specifications I explain the schematic and the functionality of the sound sensor modules in detail. You create the wiring and the program code for Arduino, ESP8266 and ESP32 microcontroller … Read more

Guide to Reduce the ESP32 Power Consumption by 95% If you want to create a project that runs on battery, you have to make sure that the ESP32 power consumption is as low as possible to increase the lifespan of the battery. In this article I will show you how to reduce the power consumption … Read more

MQ2 Gas Sensor Tutorial for Arduino, ESP8266 and ESP32 In this tutorial I show you how to use the MQ2 gas sensor with your Arduino, ESP8266 or ESP32 microcontroller. After we dive into the functionality of gas sensors in general, we build a gas alarm  with the MQ2 gas sensor that detects smoke and turn … Read more

KY-026 Flame Sensor Tutorial for Arduino, ESP8266 and ESP32 In this article you learn how to build your own fire alarm that could detect a fire inside a room. In the first part of the tutorial you learn the different methods to detect a fire. We finish the tutorial with a project where we build … Read more

SD Card Tutorial for Arduino, ESP8266 and ESP32 In this tutorial you learn how to use the SD card module in combination with your Arduino, ESP8266 and ESP32 microcontroller board. We create a temperature logger where we store the time from a real-time clock module, the temperature and humidity to a micro SD card. Table … Read more

Guide to reduce the Arduino Power Consumption In this guide I show you 3 hardware and 1 software measure that reduce the energy consumption of the Arduino microcontroller up to 89%. The following measures are done in this tutorial: Use a Smaller Microcontroller (Hardware) Reduce Clock Speed (Hardware) Reduce Operation Voltage (Hardware) Use the Arduino … Read more

What is the best battery for the EPS32? In this article you learn what is the best battery for the ESP32 microcontroller. First I describe the different voltage levels on the ESP32 board to avoid magic smoke and a damage of the microcontroller. On top of all this content, you learn which batteries need a … Read more