Author name: electronics guru

How to control an inverting operational amplifier using Arduino UNO and a digital potentiometer

What is an operational amplifier? The operational amplifier (also called opamp) is a solid-state analog electronic component capable, as its name suggests, of amplifying an electrical signal. It is defined as operational because it is able to perform some mathematical operations in a totally analogical way on electrical signals. The generally possible operations are addition, […]

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How to use the EEPROM memory on the NodeMCU ESP8266

What is the the EEPROM memory The EEPROM memory (acronym for Electrically Erasable Programmable Read-Only Memory) is a type of memory present in many electronic devices (including our beloved devices such as Arduino or NodeMCU ESP8266 / ESP32 etc) used to store small amounts of data in a ” almost” permanent way. In practice, the

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

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

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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