Logic Controller LED Driver PCB

I successfully finished a project designing a logic-controlled LED driver PCB for a passenger ticket gate system used in public transport infrastructure in Poland, using only MOSFETs and logic gates, no microcontroller involved. The board takes three 2V input signals, processes them through AND, OR, and NOT gates, and determines which LEDs should turn on based on predefined logic conditions and a jumper switch.

To ensure stable logic operation, I shifted the 2V inputs to 5V before feeding them into the gates, avoiding any issues with voltage thresholds. The circuit uses AO3400A (N-MOSFETs) and AO3403A (P-MOSFETs) for power switching and signal control.