12DecDecember 12, 2025

MotorBot with Esp32

09-06-2025🔧 Components Needed:ComponentQuantityESP32 Dev Board1L298N Motor Driver Module1DC Gear Motors (TT or BO motors)23 x Li-ion 18650 Cells (3.7V each)1 battery pack (11.1V total)Battery Holder or 3S Battery Pack1Breadboard (optional, for testing)1Jumper Wires (Male-to-Male/Female)~15-20Robot Chassis + Wheels1 setSwitch (optional, for power control)1🔌 Connections:✅ Power Supply:Connect battery pack positive to +12V terminal on L298N.Connect battery pack negative to GND on L298N.Remove the jumper on L298N between +12V and 5V (important! Use external 5V for ESP32).Use buck converter (recommended) to step down 11.1V to 5V and power ESP32 through 5V and GND.✅ L298N to Motors:Connect:Motor A terminals (OUT1 & OUT2) to Left motor.Motor B terminals (OUT3 & OUT4) to Right motor.✅ L298N...

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12DecDecember 12, 2025

Node MCU ESP8266 Setup in Arduino IDE

18-01-2024Node MCU ESP8266 Board are so popular? Mainly because of the following features.Its true Arduino KillerLow-costWiFiLow PowerHigh GPIO PINCompatiblityMultiple Language supportMain Differences Between ESP8266 and ESP32There is a successor of the ESP8266—the ESP32. The ESP32 combines Wi-Fi and Bluetooth and is dual-core. If you want to start with any of these boards, we recommend getting an ESP32. If you already have an ESP8266, don’t worry. It works great, it has a huge community and it does the job for most...

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12DecDecember 12, 2025

ESP32 with L298N DC Motor Driver

08-06-2025🔧 Basic IntroductionL298N is a dual H-Bridge motor driver IC that allows controlling the direction and speed of two DC motors or one stepper motor.It operates on high voltage and high current, making it suitable for robotics and mechatronics applications.⚙️ Technical SpecificationsOperating Voltage: 5V to 35V (Motor supply); 5V logic supply.Current Handling: Up to 2A per channel continuously.Logic Level Inputs: Compatible with 5V logic (Arduino, ESP32, etc.).Heat Sink: Comes with a built-in heat sink to dissipate heat during high load.Control Pins: IN1, IN2, IN3, IN4 to control motor direction.Enable...

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12DecDecember 12, 2025

ESP32 Setup in Arduino IDE

ESP32 Board are so popular? Mainly because of the following featuresLow-costBluetoothWiFiLow PowerDual CoreHigh GPIO PINCompatiblityMultiple Language supportSetup ESP32 with Arduino IDETo be able to program the ESP32 using Arduino IDE, you need to add support for the ESP32 boards. Follow the next steps:Go to File > Preferences.Enter the following into the “Additional Board Manager URLs” field. This will add support for ESP32 and ESP8266 boards as well.https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json,http://arduino.esp8266.com/stable/package_esp8266com_index.jsonSee the figure below. Then, click the “OK” button.Open the Boards Manager. Go to Tools > Board >Boards Manager…Search for...

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12DecDecember 12, 2025

ESP32 with Ultrasonic Sensor (HC-SR04)

🧠 What is an Ultrasonic Sensor?An ultrasonic sensor is a device that uses sound waves to detect how far something is.🧩 HC-SR04 Ultrasonic Sensor: Pinout and FunctionThe HC-SR04 sensor has 4 pins:PinNameFunction1VCCPower supply (+5V)2TrigTrigger pin – sends sound3EchoEcho pin – receives sound4GNDGround (0V)🔌 Pin Details and Use:VCC: Connect to +5V from your microcontroller or Arduino.GND: Connect to ground (GND).Trig (Trigger):You send a short pulse (about 10 microseconds) to this pin.This starts the sound wave.Echo:This pin goes HIGH (on) when the echo is being received.You measure how long it's HIGH to calculate distance.📏 Connection Example...

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