n this project, we will design a dual power source charger. This charger uses power from the electricity grid and solar power. The system prioritises the electricity grid over solar. In simple terms, if both sources are available, the system will automatically select the electric grid. This charger features two main characteristics: an automatic power … Read more
The L298N dual H-bridge motor driver is among the most popular DC motor drivers. It features a simple interface and uses fewer pins to connect to the microcontroller. Its method of integration allows it to support a wider range of microcontrollers. In this practice, we will focus more on understanding how to use the L298N … Read more
DHT11 is a four(4) pin sensor for measuring temperature and humidity. This sensor is cheap, small, and reliable for temperature and humidity projects. The DHT 11 works well with all microcontrollers for Arduino to ESPs. This post will review how to use this sensor in projects. How to add the DHT 11 library in Arduino … Read more
A typical I2C system consists of two separate components or microcontrollers between which we intend to enable data transmission. The I2C system is handy in electronics design as it can facilitate communication between as many as 119 components. The I2C system is made up of 4 pins, they are power (Vcc), ground, SCL, and SDA … Read more
Imagine a world where buttons vanish, and your touch alone activates devices. Picture a light switch that responds to your fingertips, a doorbell that senses your approach, or a sleek control panel that requires no physical buttons. Welcome to the realm of TTP223 Capacitive Touch Sensor, where magic meets technology. In this blog post, we’ll … Read more
The TDA2822 is a versatile and widely-used integrated circuit known for its role as a dual audio power amplifier. It’s designed to function in portable audio devices like cassette players, radios, and CD players due to its low voltage operation and power efficiency. This IC stands out for its ability to operate on a supply … Read more
Introduction to ESP-01 ESP-01 is a Wi-Fi module that enables wireless communication and internet access for microcontroller projects. It is based on the ESP8266 chip, which has a 32-bit processor, a TCP/IP stack, and a Wi-Fi transceiver. It can operate in three modes: as an access point, as a station, or as both. It can … Read more
Introduction to Decade Counter CD 4017 CD 4017 decade counter is an IC that can count from 0 to 9 in binary code. It has 10 output pins, each corresponding to a digit from 0 to 9. The output pins change state sequentially as the counter receives clock pulses from an external source. A decade … Read more
Introduction to MQ2 gas sensors MQ2 gas sensors are compact and versatile electronic devices designed to detect various types of gases in the surrounding environment. These sensors belong to the MQ series, which is a line of gas sensors widely used for applications in safety, industrial processes, and environmental monitoring. MQ2 gas sensors, in particular, … Read more
Introduction to soil moisture sensors Soil moisture sensors are innovative devices designed to measure the amount of moisture present in the soil. They play a crucial role in modern agriculture, environmental monitoring, and landscaping by providing valuable data to optimize irrigation practices, enhance crop yields, and conserve water resources. These sensors employ various technologies to … Read more
Introduction to liquid crystal display Liquid Crystal Displays (LCDs) are used to enhance electronic projects by providing a visual interface for data presentation and interaction. They allow users to display information, messages, and sensor readings in a user-friendly format. When integrated into Arduino projects, Liquid crystal displays (LCD) help in the visualization of real-time data … Read more
Introduction to ultrasonic sensors Ultrasonic sensors are electronic devices that utilize sound waves to detect and measure distances or objects. These sensors work on the principle of emitting ultrasonic waves and measuring the time it takes for these waves to bounce back after hitting an object. The sound is inaudible to human hearing. The time … Read more
Introduction to servo motors Servo motors are electromechanical devices that are used to achieve precise control over the position, speed, and acceleration of a mechanical system. The control mechanism used by the motor is the pulse width modulation. They are commonly used in robotics, manufacturing machinery, automation equipment, and other sectors and applications that demand … Read more
Introduction to arduino IDE software Arduino IDE software is an IDE that is used as a coding environment for an arduino board. In a previous post, we focused more on the physical component and how to use the board in a circuit. The arduino IDE software serves as a development environment where all the code … Read more
Introduction to the operational modes of a 555 timer A 555 timer is one of the most used integrated circuits for most electronic projects. We would discuss in detail all the operational modes of a 555 timer. It functions in different circuits as either a switch, a flip-flop, or an oscillator. A 555 timer can … Read more
Introduction to rain detector alarm system A rain detector alarm system is a simple device that alerts households when it senses rainfall. In areas where rainfalls are common or during rainy seasons, it’s important that we get informed about rainfall on time so we make necessary arrangements before the rain starts falling heavily. The device … Read more
Introduction to diodes We would focus on how diodes work and what role they play in circuit design. Diodes are electronic components that allow current to flow in one direction but not the other. Most common diodes have two leads. Some are clear with reddish-orange on the inside and a black stripe on one end … Read more
Introduction of battery charge controller Since the innovation of secondary cells, the Recharging of batteries has been made possible by passing direct current through them. However, challenges have risen on how to know when the battery is fully charged and to cut off charging automatically if the battery is fully charged since overcharging damages battery … Read more
Introduction to transistors Transistors are active electronic components that can be used for amplification or switching circuits. We would look in detail at how transistors work. We would be focused on BJTs The basic type of transistor is the bipolar junction transistor. Bipolar junction transistors (BJT) Bipolar junction transistor is similar to diodes. Diodes have … Read more
Introduction to operational amplifiers An operational amplifier also referred to as an op amp is a high gain DC voltage amplifier, meaning it can use a very small voltage difference between its input to control a much larger voltage at its output usually 100 thousands of times larger. operational amplifiers come in different package types … Read more