How wireless nRF24L01+ module works?

nRF24L01+ PA LNA

Nowadays, wireless communication rules the entire world. There are many wireless communication technologies available like Bluetooth, Wifi, RF, etc. The NRF24L01 is one of the wireless transceiver RF modules used for SPI communication with a 2Mbps transmission speed. If you want to know or learn how the nRF24L01+ module works, then you are at the … Read more

LED Matrix and How to make our own LED Dot Matrix?

LED Dot Matrix

Generally, we have many displays available in the market like OLED, LCD display, LED Display, etc. We cannot make those displays in our home. But there is one display called LED matrix display which is used widely in the industry. We can make the LED matrices in our home. We are going to see how … Read more

Understanding the Microcontroller GPIO – GPIO Working Explained

Understanding the Microcontroller GPIO

In general, whenever we learn a new programming language we used to write the “Hello World” program first. Likewise in the microcontroller, we try the LED Blinking program. To blink the LED, we need to access the  GPIO. If you are a programmer, you can just write “1” to the GPIO pin to make it … Read more

SPI – Serial Peripheral Interface Protocol Basics

Multi Slave SPI

When I was a newbie in Embedded Systems, I used to wonder how the microcontroller is communicating with other devices like sensors, displays, and SD cards, etc. I heard about UART already, but not the SPI, and I2C. Then I got to know that, there are many other serial communications are available other than UART. … Read more

Bluetooth Low Energy (BLE) Introduction Part 2

Bluetooth Low Energy (BLE) Introduction Bluetooth Low Energy Basics

In our previous tutorial (Part 1) we have seen the very basics of BLE. Now we will see Bluetooth Low Energy (BLE) Introduction Part 2. In this part, we will discuss the BLE Protocol stack. Before that quick recap about the BLE. You can also read, Bluetooth interfacing with LPC2148, Bluetooth interfacing with PIC16F877A, and … Read more

Bluetooth Low Energy Basics (BLE) – Introduction Part 1

Bluetooth Low Energy (BLE) Introduction Bluetooth Low Energy Basics

Bluetooth is one of the most popular wireless protocols, and it has been available in smartphones, computers, and other devices for over a decade. Most of us are familiar with Bluetooth and how Bluetooth can allow us to connect a headset and make calls using our cell phones. The explosive growth in Bluetooth devices led … Read more

How Does RFID Works?

How Does RFID Works - (© rcphotostock (20440))

If you read this tutorial you will come to know the answer to How Does RFID Works? You can also read 8051 RFID interfacing, LPC2148 RFID interfacing, and PIC16F877A RFID interfacing. Introduction RFID is an acronym for “Radio-Frequency Identification” and refers to a technology whereby digital data encoded in RFID tags or smart labels (defined … Read more

ULN2803 Relay Driver Working

In this tutorial, we are going to see the ULN2803 Relay Driver Working Function. Let’s Start. You can also read LPC2148 Relay interfacing, 8051 Relay interfacing, PIC16F877A Relay interfacing, and L293D motor driver working. Introduction of ULN2803 The ULN2803 is a high-voltage, high-current Darlington transistor array. The device consists of eight NPN Darlington pairs that … Read more

L293D Motor Driver Working Operation

L293D Motor Driver Working

In this tutorial, we will see L293d Motor Driver Working Operation. You can also read 8051 DC Motor interfacing, PIC16F877A DC motor interfacing, LPC2148 DC motor interfacing, Bluetooth interfacing with PIC16F877A, and Bluetooth interfacing with 8051. Introduction Even the simplest robot requires a motor to rotate a wheel or performs particular action. Since motors require … Read more

I2C Protocol Introduction – Part 2 (Advanced Topics)

I2C Protocol

This is the continuation of the I2C Protocol Tutorial  Part 1 (I2C Basics). You can also read the I2C Linux device driver. Cont ( I2C Tutorial )… The I2C Protocol bus uses two wires: serial data (SDA) and serial clock (SCL). All I2C master and slave devices are connected with only those two wires. Each … Read more