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Overview A potentiometer is a device that can change its resistance by moving a contact along a fixed resistor. It has three terminals: one connected to each end of the resistor and one connected to the movable contact. By adjusting the position of the contact, the potentiometer can divide the input voltage into different output voltages [Read more in Wikipedia]. Potentiometers work by creating a voltage drop across the resistor that is proportional to its length. For example, if the input voltage is 10...

Overview In this tutorial, you’ll get to know how to use the rotary encoder. First, you’ll see some information about the rotational encoder, and then you’ll learn how to use a rotary encoder with three practical examples. What You Will Learn What the rotary encoder is and how it works. Displaying encoder position Controlling a LED light using a rotary encoder Controlling a DC moto...

Overview Suppose you want to make a 4x4x4 LED matrix. You will need 64 digital pins to control such an LED matrix. So, it would not be affordable if you decided to choose a microcontroller which has that number of digital pins. So, what is the alternative? In such cases, the most suitable way is to use a shift register to increase the number of digital pins of your microcontroller. Increasing the number of digital pins of microcontrollers is among the most attractive and practical topics. In many applicatio...

Overview Power outages are one of the main problems for computers and electrical systems. Sometimes there is data and information in your system that you do not want to be deleted with a power outage. If you do not want your data and information to be lost when the power supply is disconnected, a simple way is to save your data to EEPROM memory.In some projects, such as a 3D printer, when the system is reset, the relevant data can be stored in EEPROM memory to calibrate the equipment and initialize it. ...

Introduction There are different sensors and methods for determining water depth, leakage, whether a container is empty or overflowing, and rain detection. One of the easiest and cheapest methods is to use a water level detection sensor that we will discuss in this tutorial.There are some other common names for this sensor: rain sensor, water level sensor, humidity sensor, and water leakage sensor. What you will learn Operating principles of a water level sensor and how to test itInterfacing th...

Mojo V3 FPGA Development Board Features Mojo V3 is an FPGA board of the Spartan 6 series, which lets you get the pleasure of configuring digital circuits on Mojo v3 based on your own specifications. What separates this FPGA from the others is the ease of use. The goal of Mojo v3 is to get you up and running with FPGA as easily as possible.The Mojo v3 FPGA Board uses the Spartan 6 and a high performance ATmega32U4 microcontroller. This board has high processing power. The ATmega32U4 microcontroller comes...

What is Temperature Switch/Thermo Switch/Thermostat? Thermo Switches are smart little devices that operate automatically when they reach a specific temperature (either open or close). They’re a crucial part of heating/cooling systems because they control and regulate the temperature. How do Thermal Switches Work? Thermo switches operate based on the contraction and expansion of a bimetallic strip and the difference in their expansion coefficient. In this article, we won’t go into much detail, but to p...