THE INSTRUCTIONAL GUIDE

One4All Kit

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Welcome to the One4All Stem Kit

Your kit empowers you to create amazing STEM projects with components for electronics, IoT, and automation. Dive into hands-on learning and innovation!

5. Tool Safety

Soldering Precautions:

Use a soldering stand to hold hot irons.

Work on heat-resistant surfaces.

Provide proper ventilation to avoid inhaling fumes.

Multimeter Usage: Ensure proper settings to avoid damage or injury.

6. Sensor and Module Handling

Static Precautions: Handle sensitive electronics (e.g., sensors, microcontrollers) with anti-static wristbands or on anti-static mats.

Environmental Protection: Keep components dry and away from extreme temperatures.

7. Solar Panels and Li-ion Batteries

Sunlight Exposure: Handle solar panels with care; do not stare directly at reflections.

Battery Handling: Use battery holders to prevent direct handling of cells.

8. Packaging and Storage

Secure Packaging: Store all components in labelled, compartmentalized containers to prevent loss or mixing.

9. Emergency Preparedness

Cut Power: Know how to disconnect power in case of a short circuit or overheating.

Fire Safety: Keep a fire extinguisher nearby, particularly when using soldering irons or batteries.

Safety Guidelines

1. General Guidelines

Supervised Use: Always have adult supervision when students are handling STEM kits.

Read Instructions: Ensure all users read the included safety instructions before starting.

First Aid: Keep a first aid kit readily available in case of minor injuries.

2. Electrical Safety

Low Voltage Components: Use components that operate at safe, low voltages (3.3V–12V) to minimize risks of electric shock.

Insulated Wires: Ensure wires are properly insulated to prevent accidental short circuits.

Battery Safety:

Do not overcharge or puncture batteries.

Avoid exposing batteries to extreme heat or moisture.

Use proper connectors to prevent reverse polarity.

Inspect Circuits: Check circuits for loose or exposed wires before powering them.

3. Mechanical Safety

Sharp Edges: Ensure tools like screwdrivers and cutting tools are used carefully, and blunt any sharp edges on mechanical components.

Moving Parts: Avoid touching moving parts (e.g., motors) during operation to prevent injury.

Wear Protective Gear: Use safety goggles and gloves when working with mechanical tools or assemblies.

4. Chemical Safety

(If the kit includes chemical components)

Storage: Store chemicals in labelled, childproof containers.

Usage Area: Conduct experiments involving chemicals in well-ventilated areas.

Protective Gear: Use gloves and safety goggles when handling chemicals.

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Microcontroller (ESP32 NodeMCU) Setup

The ESP32 NodeMCU included in the kit is equipped with WiFi and Bluetooth, enabling remote control and IoT functionalities.

• Getting Started with ESP32:
  • Introduction to ESP32
  • Installation Guide: Getting Started with ESP32 by Last Minute Engineers
• Basic Project: Connect the ESP32 to the Arduino IDE and test the WiFi capabilities with a simple LED on/off project.

Power System Overview

Your kit includes a Li-ion cell (3.7V, 2000mAh), a boost converter, and a charging module:

• Battery Charging Module: Connect the Li-ion cell to the charging module to maintain a safe 4.2V charge.
• Boost Converter: The boost converter can increase voltage output up to 28V. Adjust voltage using the potentiometer.
• Resource: 
• Boost Converter Guide on Instructables
• Boost Converter Setup Video 1
• Boost Converter Setup Video 2

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Working with Sensors

The kit provides several sensors. Here’s how to set up and use a few of them:

• IR Obstacle Sensor:
  • Application: Ideal for detecting nearby objects in robotics.
  • Setup and Code Example: IR Sensor Guide
  • Resources: 
    • IR Sensor Guide on Instructables
    • IR Sensor Video Guide
• Light Sensor (LDR):
  • Function: Measures light intensity.
  • Usage: Connect to the ESP32’s analog input to monitor ambient light levels.
  • Resources: LDR Alarm Project on Instructables
• Gas Sensor (MQ5):
  • Purpose: Detects gas concentrations, useful for air quality projects.
  • Setup and Example Code: MQ5 Gas Sensor with Arduino
  • Resources: LDR Alarm Project on Instructables
• DHT11 Temperature and Humidity Sensor:
  • Application: Measure temperature and humidity.
  • Instructions: Use with the ESP32 for environmental monitoring.
  • Resource: DHT11 with ESP32 Guide

Motors and Motion Components

• Geared Motors (6V-9V):
  • Use in Projects: Suitable for basic movement in robotic projects.
  • Motor Driver Setup: Use the motor driver for control; MOSFETs are also included for higher power switching.
  • Resource:
    • Motor Driver Tutorial 1
    • Motor Driver Tutorial 2

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Working with Connectors and Headers

• Jumper Wires and Silicon Wires:
  • Jumper Wires: For low-power connections like sensors and LEDs.
  • Silicon Wires: For high-power components (over 0.5A current).
• Headers: Link the microcontroller to other modules using headers and jumper wires for stable connections.
• Resource: Jumper Wire Basics

Sample Projects

• Project 1: Smart Light Control System
  • Components Needed: ESP32, LDR, LED.
  • Instructions: Use the LDR to detect light levels and automatically turn an LED on/off.
  • Code Example and Guide: Smart Light Control with LDR
• Project 2: Simple Temperature and Humidity Logger
  • Components Needed: ESP32, DHT11, Li-ion cell.
  • Instructions: Monitor and display temperature and humidity using the DHT11 sensor.
  • Resource:
    • DHT11 Logger Guide 1
    • DHT11 Logger Guide 2

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