Blog - Techrm

How to make an automatic sprinkler controlled by Telegram with the ESP8266 NodeMCU

Leave a Comment / NodeMCU, Datalogger, esp8266, PlatformIO / electronics guru

Today, information technology and electronics pervade almost every aspect of our lives. There are automatic electronic systems that have many different functions, sometimes they are a little invasive but they are often very useful and help us in our daily activities. One of the fields where certain devices are extremely suitable is gardening, in particular […]

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How to create a project for NodeMCU ESP8266 with PlatformIO

Leave a Comment / PlatformIO, esp8266, NodeMCU / electronics guru

Creating the project using PlatformIO Today we want to see how to create a new project for the NodeMCU ESP8266 board using the PlatformIO IDE and how to add external libraries to the project. Please note that the operating system I use is a Linux distribution (specifically Fedora 36). So the folder structure in the

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How to control a digital potentiometer using Arduino UNO

Leave a Comment / Arduino / electronics guru

Introduction What is a digital potentiometer? We’ve all used a classic potentiometer at least once in our lives: it’s the classic volume knob on our radio! We may not even notice it when instead we are dealing with a digital potentiometer. When on the radio, to vary the volume of the music, we don’t use

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How to make a bluetooth datalogger for temperature and humidity using Arduino MEGA.

Leave a Comment / Arduino, Datalogger / electronics guru

What is a data logger for? A data logger is an electronic device which acquires physical parameters (for example temperature, humidity, atmospheric pressure, pollutants, etc.) in precise time intervals and saves them on a permanent memory device (such as an SD card) or transmits them to a cloud platform to be processed and displayed.

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Thermo-hygrometer with clock and LCD display on Arduino UNO

Leave a Comment / Arduino / electronics guru

What is the thermo-hygrometer used for? A thermo-hygrometer is a device that measures ambient temperature and humidity. These two parameters are measured by a special sensor at regular time intervals. They can then simply be viewed on a display or stored on an SD card (in order to have a history) or even sent to

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Ultrasonic distance meter with LCD display on Arduino UNO

Leave a Comment / Arduino / electronics guru

Introduction In this tutorial we will see how to make an ultrasonic distance meter. Ultrasounds are acoustic waves having a frequency higher than that audible by humans. The medium crossed by the ultrasounds conditions its propagation speed. They are slower in gaseous media and faster in solid media. In air the speed of propagation is

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Simple calculator based on Arduino MEGA

Arduino / electronics guru

Introduction Nowadays making calculations is not a problem at all. A powerful scientific calculator costs a few dollars or can be easily installed on phones or computers.We at Techrm have however decided to turn Arduino into a calculator. Ours is a very simple calculator, for example it accepts only integer numbers as input and we

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Yet another tutorial on how to solder

Leave a Comment / Soldering / electronics guru

Introduction In this tutorial we will see how to solder a 16-pin connector on a 1602A LCD display. You can see all the projects featured in this blog using this display by going to the link https://www.techrm.com/tag/1602a/.

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Getting started with BTE13-010 – Arduino Mini clone

Arduino, Soldering / electronics guru

Introduction This is a simple guide that will teach you how to take the first steps with the BTE13-010 module, a cheap Arduino mini clone. We will go through the 4 basic steps necessary to get it working immediately and without problems: * Not strictly necessary but very useful if you are planning to use

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