Sensor Connection Guide
Updated 1 document property
0:05
Set System Architecture to "```mermaid graph LR UNO[Arduino Uno] PIR[HC-SR501 PIR] Hall[A3144 Hall Sensor] Mic[GY-MAX4466 Microphone] Buzzer[Ac..."
157 days
Worked
157 days
0:00
Work done
- Updated project description to “Arduino Uno Multi-Sensor Security Node with PIR, Hall, Microphone, OLED, Buzzer & RC522 RFID via 74LVC125 Level Shifter.”
Remaining tasks
- Define system architecture (add project property with mermaid diagram)
- Add major ICs: Arduino Uno and 74LVC125 level shifter
- Place sensor/actuator modules: HC-SR501 PIR, A3144 Hall, GY-MAX4466 mic, Active Buzzer, I2C OLED, RC522 RFID
- Review power subsystem (5 V, 3.3 V, GND) covers all modules
- Connect all nets per plan (signal, power, and level-shifted SPI lines)
- Add schematic annotations (PIR timing note; buzzer active-LOW)
- Review schematic completeness
Success criteria
- None met yet; schematic integration and annotations still pending.
Next step
Define the system architecture property with a mermaid diagram showing the Uno at the center connected to each module.
157 days
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