15DecDecember 15, 2025

Smart Display Interface Using SSD1306 OLED & ESP32

The SSD1306 is a popular controller used in OLED (Organic Light Emitting Diode) displays, most commonly found in small monochrome displays like 128x64 or 128x32 resolution screens. These displays are perfect for small embedded projects like IoT dashboards, sensor readouts, clocks, etc.📦 1. What is SSD1306?SSD1306 is a display driver IC developed by Solomon Systech.It controls monochrome OLED panels using I²C or SPI communication.Often embedded in 0.96-inch or 1.3-inch OLED displays.📐 2. Common SpecificationsFeatureDescriptionResolution128x64 or 128x32 pixelsDisplay TypeMonochrome OLED (white/blue/yellow)InterfaceI²C (2-wire) or SPI (4-wire)Voltage3.3V to 5V (check module)Power ConsumptionVery low (great for battery use)Color1-bit (pixel on or off)Size (Popular)0.96" diagonal🧪...

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15DecDecember 15, 2025

ESP32-Based Autonomous Fire Extinguisher Bot

🔥 FIRE BOT – Bluetooth Controlled Fire Extinguisher RobotWelcome to the FIRE BOT project! This robot is designed to detect and extinguish small fires using a flame sensor and a water pump. It is fully controllable via Bluetooth, making it ideal for educational or experimental firefighting applications.🧠 Features🔥 Flame detection💧 Water pump activation🎮 Bluetooth remote control (with mobile app)🛞 Motor movement: Forward, Reverse, Left, Right🔁 Servo motor to aim the water spray🧪 Manual + Automatic mode supported📦 Hardware UsedArduino Uno (or compatible...

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12DecDecember 12, 2025

ESP32 with DHT11 Temperature & Humidity Sensor

📌 What is the DHT11 Sensor?The DHT11 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and outputs a digital signal on the data pin (no analog input needed).🧠 Key Features of DHT11FeatureDetailsTemperature Range0 to 50°C (±2°C accuracy)Humidity Range20% to 90% RH (±5% accuracy)Operating Voltage3V to 5.5VSignal TypeDigital (single-wire serial)Sampling Rate1 Hz (one reading per second)SizeSmall and lightweight⚙️ Pinout of DHT11 SensorPinNameDescription1VCCPower supply (3.3V or 5V)2DataSerial data output3NCNot connected4GNDGround(Sometimes it comes in a 3-pin module: VCC,...

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12DecDecember 12, 2025

ESP32 with ADXL335 Accelerometer

11-06-2025The ADXL335 is a small, thin, low-power 3-axis analog accelerometer manufactured by Analog Devices. It is widely used in embedded systems and electronics projects for sensing acceleration in the X, Y, and Z directions.🔧 Key Features of ADXL335FeatureDescriptionTypeAnalog 3-axis accelerometerMeasurement Range±3 g (g = gravity, approx. 9.81 m/s²)Power Supply1.8V to 3.6VOutput TypeAnalog voltageSensitivity~300 mV/g (at 3V supply)Low Power~350 µA typicalOperating Temp-40°C to +85°CBandwidthAdjustable via external capacitors📊 How It WorksThe ADXL335 uses a micro-machined structure suspended by springs inside a silicon chip.As the device accelerates, the structure deflects, changing the capacitance...

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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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