How to setup 16x2 lcd on Arduino? Its not big issue ,read full blog and watch video at the end of content. It is hard to display data using serial monitor. So if you want to display data of Arduino or given text to 16x2 Char LCD .This tutorial will help you. Required component :Arduino Uno Board x 1 IIC LCD /I2C LCD . or I2C Display Module + 16x2 Char LCD x 1 M to F Jumper Wire x...
PIR modules have a 3-pin connection at the side or bottom. The pinout may vary between modules so triple-check the pinout! It's often silkscreened on right next to the connection (at least, ours is!) One pin will be ground, another will be signal and the final one will be power. Power is usually 3-5VDC input. When object comes in detecting area it will return 1 from output pin otherwise it return 0. The IR sensor itself is housed in a hermetically sealed metal can to improve...
⏰ What is DS1307 RTC?The DS1307 is a real-time clock IC by Maxim Integrated that keeps track of:SecondsMinutesHours (12 or 24-hour mode)Day, Date, Month, YearAutomatically adjusts for leap years✅ It communicates with microcontrollers using SPI (Serial Peripheral Interface) — unlike the more common DS1307, which uses I2C.🔍 Key FeaturesFeatureDetailsInterfaceSPIVoltage2.0V – 5.5VTimekeepingSeconds, Minutes, Hours, Day, DateBattery backupYes (CR1220 or CR2032 coin cell)OscillatorRequires external 32.768 kHz crystalAlarm + Square WaveBuilt-in (configurable)🧰 Components RequiredComponentDescriptionESP32 boardMicrocontrollerDS1306 RTC moduleWith CR2032 battery and SPI pinsJumper wiresMale-to-female preferredBreadboardFor clean prototypingArduino IDETo program ESP32🔌 DS1307 to ESP32 Wiring...
🌡️ What is DS18B20?The DS18B20 is a digital temperature sensor from Maxim Integrated (now Analog Devices), known for:✅ Accurate temperature readings✅ Unique 64-bit serial code (for multiple sensors on one wire)✅ 1-Wire interface (needs only 1 data line + GND + VCC)✅ Waterproof versions available📋 Key FeaturesFeatureDescriptionTemperature Range-55°C to +125°CAccuracy±0.5°C (from -10°C to +85°C)Interface1-Wire digitalResolutionProgrammable: 9 to 12 bitsVoltage3.0V to 5.5VID AddressEach sensor has a unique ID🧰 Components UsedComponentDescriptionESP32 Dev BoardMicrocontrollerDS18B20 SensorWaterproof or standard TO-92 version4.7kΩ ResistorPull-up resistor for 1-WireJumper WiresFor connectionsBreadboard (opt.)For prototyping🔌 DS18B20 Pinout...
🎵 What is DFPlayer Mini?The DFPlayer Mini is a tiny, standalone MP3 audio player module. It can play audio files (MP3/WAV) stored on a microSD card. You can control it through:Serial communication (UART with ESP32 or Arduino)Built-in IO pins (for button-triggered audio)Library-based commands to control volume, play/pause, next, loop, etc.📦 DFPlayer Mini PinoutPinFunctionVCCPower (3.2V–5V)GNDGroundTXSerial Transmit (connect to ESP32 RX)RXSerial Receive (connect to ESP32 TX)SPK1, SPK2Speaker output (mono, 3W)DAC_L/RStereo line out (for headphones/amp)IO1/IO2Button controlBUSYLOW when playing🔌 Wiring DFPlayer Mini with ESP32🔧 ESP32 to DFPlayer Mini (Serial Connection):DFPlayer PinESP32...
📌 What is ESP-NOW?ESP-NOW is a wireless communication protocol developed by Espressif, allowing ESP32 boards to send and receive data directly without Wi-Fi or internet.🧠 Key Features📡 Peer-to-peer communication (up to 20 devices)⚡ Low power and fast (few milliseconds delay)🔐 Encrypted data transmission🚫 No Wi-Fi router or internet needed🔁 Bi-directional communication supported🔌 Where to Use (Use Cases)🎮 Wireless joystick controller🏠 Smart home automation🚨 Personal safety devices (like Safeguard+)🌱 Remote environment sensors🚗 Vehicle-to-vehicle communication🎓 College projects requiring mesh or local network🛠️ Components Needed✅ 2x...
📌 What is the Dot Matrix Display with MAX7219?A Dot Matrix Display is an arrangement of LEDs in a grid (commonly 8x8) used to display text, symbols, numbers, or animations. When combined with the MAX7219 driver chip, it becomes much easier to control multiple displays using just 3 wires (SPI) from the ESP32.🧠 Key Features of Dot Matrix with MAX7219FeatureDetailsDisplay TypeLED Dot Matrix (8x8 per module)Module DriverMAX7219InterfaceSPI-compatible (DIN, CLK, CS)Voltage5V (logic safe for ESP32)CascadableYes (multiple modules side-by-side)Control LibraryMD_Parola / MD_MAX72xxBrightness ControlYes (adjustable via software)⚙️ Pinout of...
