№ files_lp_4_process_3_080760
Instructional activity describing the assembly and verification of a gas sensor circuit using an Arduino UNO R3, an MQ-135 gas sensor, and an OLED display, including wiring diagrams, connection tables, and safety notes for classroom use.
Document Type: Learning activity instructions
Subject: Electronics and sensor circuits
Topic: Building a gas sensor circuit using Arduino
Components: Arduino UNO R3, MQ-135 gas sensor, 0.96” OLED display, jumper wires, 9V AC/DC power adapter
Required Materials: Arduino UNO R3 board, MQ-135 gas sensor module, OLED display, eight colored jumper wires, power adapter
Connection Interface: Arduino pin connections to OLED display and MQ-135 sensor
Connection Details: VCC, GND, SCL, SDA, AO, DO pin mapping between components
Instruction Format: Step-by-step participant instructions with wiring table and diagrams
Figures Referenced: Figure 1 wire connection diagram; Figure 2 voltage regulator location; Figure 3 reset button location
Software / Tools Referenced: Fritzing
Audience: Students participating in instructor-led electronics activity
Supervision Requirement: Instructor verification before powering the circuit
Power Supply: 9V DC input via AC/DC adapter
Safety Considerations: Static electricity precautions and heat from Arduino voltage regulator
Learning Context: Classroom or workshop electronics activity
Price: 8 / 10 USD
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