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Components Reference

This section provides detailed information about each component in your TechToast ESP32 Basic Starter Kit. Understanding these components will help you build better projects and troubleshoot issues.

Categories

Development Board

ESP32 Development Board

The heart of your projects. This powerful microcontroller features: - Built-in Wi-Fi and Bluetooth for wireless connectivity - Dual-core processor for efficient multitasking - Ample GPIO pins for connecting multiple components - Support for SPI, I2C, and UART communication protocols - Low-power modes for battery-powered applications

Prototyping Tools

Double-Width Breadboard

  • 830 tie points for building complex circuits
  • No soldering required - perfect for prototyping
  • Standard spacing for integrated circuits and components
  • Learn more: See Breadboard Basics for detailed usage instructions

USB Programming Cable

  • Micro-USB to USB-A cable
  • Provides power to the ESP32 (5V)
  • Transmits data for uploading code
  • Durable construction for repeated use

Jumper Wires

  • 10x Male-to-Male - For breadboard connections
  • 10x Male-to-Female - For connecting to ESP32 pins
  • Pre-cut and stripped - Ready to use

Sensors

IR Obstacle Avoidance Module

  • Infrared-based object detection
  • Adjustable sensitivity with onboard potentiometer
  • Digital output (HIGH/LOW) for easy reading
  • Ideal for robotics and navigation projects

Soil Moisture Sensor

  • Measures water content in soil
  • Analog and digital outputs
  • Adjustable threshold with potentiometer
  • Perfect for smart gardening projects

Sound Sensor

  • Condenser microphone for sound detection
  • Analog output for sound intensity
  • Digital output with adjustable threshold
  • Great for voice-activated projects

Water Level Sensor

  • Detects water presence and level
  • Analog output for precise measurement
  • Corrosion-resistant electrodes
  • Useful for weather stations and liquid monitoring

DHT11 Temperature and Humidity Sensor

  • Measures temperature (0-50°C ±2°C accuracy)
  • Measures humidity (20-90% ±5% accuracy)
  • Digital output for easy reading
  • Low cost and reliable

Thermistor

  • Temperature-sensitive resistor
  • Resistance changes with temperature
  • Analog measurement required
  • Good for temperature monitoring

Photoresistor (LDR)

  • Light-dependent resistor
  • Resistance decreases with more light
  • Analog measurement required
  • Perfect for light-sensing projects

Output Devices

7-Segment Display

  • Single-digit numeric display
  • 7 segments + decimal point
  • Common anode configuration
  • Easy to control with GPIO pins

Passive Buzzer

  • Generates tones with varying frequencies
  • Requires PWM signal to produce sound
  • Can play melodies and custom tones
  • Ideal for audio feedback

Active Buzzer

  • Built-in oscillator produces continuous tone
  • Simple on/off control (HIGH/LOW signal)
  • Louder output than passive buzzer
  • Good for alarms and notifications

RGB LED

  • Single LED with red, green, and blue elements
  • Common cathode configuration
  • PWM control for color mixing
  • Create any color by combining intensities

Single-Color LEDs

  • 5x Red LEDs - Standard indicators
  • 5x Green LEDs - Status/power indicators
  • 5x Yellow LEDs - Warning/attention indicators
  • Require current-limiting resistors (220Ω recommended)

Input Devices

Push Buttons (6x)

  • Momentary switches - only active when pressed
  • 4-pin design for breadboard compatibility
  • Require pull-up/down resistors for reliable reading
  • Perfect for user input and control

Tilt Switch

  • Mercury or ball-bearing based switch
  • Closes circuit when tilted
  • Digital output (HIGH/LOW)
  • Great for orientation detection

Potentiometer

  • 10kΩ variable resistor
  • Adjustable voltage divider
  • Analog output (0-3.3V)
  • Useful for dimming, volume control, etc.

Passive Components

Resistors

  • 10x 220Ω - For current-limiting with LEDs
  • 10x 1kΩ - General purpose, pull-up/down resistors
  • 10x 10kΩ - General purpose, pull-up/down resistors

Resistor Colour Card

  • Quick reference for resistor values
  • Color code chart for identification
  • Handy tool for beginners

Accessories

PDF Instruction Manual QR Code Card

  • Scannable QR code linking to full manual
  • Quick access to digital documentation
  • Useful reference when away from computer

Next Steps

Now that you're familiar with the components: - Check out the tutorials to learn how to use them - Visit Getting Started if you haven't set up your environment yet - Combine components to create your own projects!