🧾 Intro
Electronic components are the building blocks of every DIY electronics project. Whether you’re creating an Arduino-based system, an IoT device, or a simple LED circuit, understanding the key components is essential. Below is a categorized list of components commonly used in DIY electronics. Each item will soon link to a detailed guide covering its function, pinout (if applicable), and project examples.
🔧 Table of Common Electronic Components
| Component Name | Category | Description | Buy Components |
|---|---|---|---|
| Resistor | Passive Component | Limits electrical current in a circuit | Buy |
| Capacitor | Passive Component | Stores and releases electrical energy | Buy |
| Inductor | Passive Component | Stores energy in a magnetic field | Buy |
| Diode | Active Component | Allows current to flow in one direction only | Buy |
| LED | Active Component | Emits light when forward-biased | Buy |
| Transistor (NPN/PNP) | Active Component | Works as a switch or amplifier | Buy |
| Relay | Switching Module | Electrically controlled switch for high voltage/current | Buy |
| LDR (Light Sensor) | Sensor | Changes resistance based on light intensity | Buy |
| PIR Motion Sensor | Sensor | Detects motion in its sensing area | Buy |
| DHT11/DHT22 | Sensor | Measures temperature and humidity | Buy |
| Ultrasonic Sensor | Sensor | Measures distance using ultrasonic waves | Buy |
| IR Sensor | Sensor | Detects infrared light for object detection | Buy |
| HC-05 Bluetooth | Communication Module | Enables Bluetooth communication with Arduino or MCU | Buy |
| ESP8266 Wi-Fi | Communication Module | Enables wireless communication via Wi-Fi | Buy |
| NRF24L01 | Communication Module | Low-power 2.4GHz RF communication module | Buy |
| Potentiometer | Input Device | Adjustable resistor to control voltage/divider | Buy |
| Push Button | Input Device | Simple switch to trigger events | Buy |
| Toggle Switch | Input Device | Mechanical switch for on/off control | Buy |
| Breadboard | Prototyping Tool | For building temporary circuits without soldering | Buy |
| PCB | Prototyping Tool | Permanent board for soldered circuits | Buy |
| 9V Battery | Power Source | Provides portable DC power | Buy |
| 18650 Li-Ion Cell | Power Source | Rechargeable battery for custom packs | Buy |
| 7805 Regulator | Voltage Regulator | Maintains constant 5V output from higher input | Buy |
| Voltage Divider | Circuit Concept | A pair of resistors that divides voltage proportionally | Buy |
| Buzzer | Output Device | Produces sound or beep for alarms | Buy |
| OLED Display (I2C) | Output Device | Small display for text/graphics with Arduino | Buy |
| LCD Display (16×2) | Output Device | Displays text in 2 rows and 16 columns | Buy |
| DS18B20 Temperature Sensor | Sensor | Digital temperature monitoring sensor | Buy |
| USB Cable | Data transfer | data transferring cable | buy |
| Jumper wires | Passive component | Connecting components | Buy |
| DS3231 RTC Module | Sensors & Modules | Accurate real-time clock | buy |
| Micro SD Card Module | Storage module | For data storage | Buy |
| L298N Motor Driver Module | Driver module | Controls motor direction and speed | Buy |
| BO Motors | Motors & Actuators | Low-voltage DC gear motor for robotics | Buy |
🧠Add This Category: Microcontrollers & Development Boards
| Component Name | Category | Description | Buy Components |
|---|---|---|---|
| Arduino UNO | Microcontroller Board | Most popular Arduino board with ATmega328P chip | Buy |
| Arduino Nano | Microcontroller Board | Compact version of Arduino UNO for smaller projects | Buy |
| Arduino Mega | Microcontroller Board | Offers more GPIO pins and memory for complex projects | Buy |
| ESP8266 (NodeMCU) | Wi-Fi Microcontroller | MCU with built-in Wi-Fi, ideal for IoT projects | Buy |
| ESP32 | Wi-Fi + Bluetooth MCU | Powerful dual-core MCU with Wi-Fi, Bluetooth, and more GPIOs | Buy |
| Raspberry Pi 4 | Single-Board Computer | Mini computer running Linux, used for advanced projects | Buy |
| Raspberry Pi Pico | Microcontroller Board | RP2040-based MCU board, great for C/Python coding | Buy |
| ATmega328P Chip | Microcontroller IC | The IC used in Arduino UNO, available for custom circuits | Buy |
| STM32 Blue Pill | Microcontroller Board | Affordable and powerful ARM Cortex-M3 board | Buy |
These boards aren’t just “components,” they’re platforms around which entire projects are built. Including them strengthens your content and helps target keywords like:
- “Best Arduino boards for beginners”
- “ESP8266 vs ESP32”
- “Arduino vs Raspberry Pi”