Learn electronics, coding, and projects — step by step.
NRF24L01 is one of the cheapest wireless radio module available in the market. In here you will learn how to interface it to Arduino and use it for controlling something remotely. PIN ASSIGNMENT CIRCUIT DIAGRAM HARDWARE INSTRUCTION Connect the NRF GND pin 1 to Arduino Uno GND pin Connect the NRF VCC pin 2 to […]
ESP32 features a builtin WiFi and Bluetooth capabilities. In this tutorial, we will focus to the Bluetooth classic because Bluetooth LE deserves a separate tutorial. CIRCUIT DIAGRAM VIDEO DEMONSTRATION CALL TO ACTION If you find this tutorial as helpful, please consider supporting me by Subscribing to my Youtube channel. Thank you and have a good […]
In this tutorial, you will be able to use the SIM800L GSM module for controlling anything through SMS. To do that, we just need to parse the incoming SMS from SIM800L through serial communication. In this Arduino sketch, we will be parsing the following: Find the string “CMT:”, then save the sender’s mobile number for […]
In this article, I will discuss how we can use a matrix keypad for text entry purposes which is similar to T9 keypad used by Nokia and other bar phones. The circuit is the same as the previous tutorial. Be sure to check it out here: 4×4 Keypad Introduction CIRCUIT DIAGRAM BILL OF MATERIALS Arduino […]
Keypad is commonly use in devices like ATM machine, microwave oven, safety vault, security door lock, and many more. In this tutorial we will focus on the most popular to electronics enthusiasts and tinkerers which is a 4×4 matrix keypad. We will discuss how it works and at the last we will provide an example […]