404599e00c
Schematic now includes: - All 22 components placed with proper symbols - Complete power section: J1 → D1 → U1 → +3.3V rail - Power LED circuit (R2 + D2) - RP2040-Zero module with power and signal connections - OLED module with I2C wiring (SDA/SCL) - Trigger output: GP2 → U2 (74LVC1G17) → R3 → J2 - Return input: J3 → R4 → R5/R6 divider → D3/D4 clamps → U3 → GP3 - Button: +3.3V → R1 → SW1 → GND - Decoupling caps C4, C5 for U2, U3 - All power symbols and ground connections - Net labels for inter-section connections Embedded lib_symbols for standalone schematic use.