• Power subsystem with 6×AA battery pack,
U2, C1 100 µF and C2 10 µF bypass capacitors added and labeled +5V
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U1 VIN fed from +5V, I2C on SDA (GPIO21) and SCL (GPIO22)
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U3 wired: S0→GPIO18, S1→GPIO19, S2→GPIO23, S3→GPIO5, OE→GND; voltage divider R1=10 kΩ/R2=22 kΩ on OUT labeled TCS_OUT→GPIO34
• Two LEDs on GPIO25/GPIO26 each with 220 Ω resistor to GND
• Push button on GPIO27 to GND with “Use INPUT_PULLUP in firmware” note
• Active buzzer on GPIO33 to GND
• Components arranged: power left, MCU center, sensors/OLED top-right, outputs bottom-right
• Nets labeled +5V, +3V3, GND, SDA, SCL, S0, S1, S2, S3, TCS_OUT, BTN, BUZZ
Success criteria all met:
– Schematic includes every component, correct net labels, voltage divider, bypass caps, and Fritzing-style layout.
What would you like to do next? We can begin a detailed schematic review to ensure everything is clear and ready for export.