ATmega328P Custom Embedded Controller Design

Hardware Design Requirements

I need help reviewing and completing a custom embedded controller schematic and PCB based on an ATmega328P-PU.

The application details are confidential. Please focus only on the hardware implementation.

Microcontroller
ATmega328P-PU
16 MHz crystal oscillator
ISP programming header
Reset circuit
5 V, 3.3V operation
Power
12 V DC input
On-board 5 V regulator for the MCU
12 V rail available for loads
Proper power distribution and decoupling
Inputs

The controller monitors six analog/digital sensing lines.

Input assignments:

Input A0
Input A1
Input A2
Input A3
Input A4
Input A5

These inputs are used for continuous signal monitoring.

Outputs

The controller drives multiple indicator groups.

Required outputs:

Output Group 1
Output Group 2
Output Group 3
Output Group 4
Output Group 5
Output Group 6

Each output controls multiple LEDs simultaneously through a transistor driver.

The controller also drives:

One 12 V buzzer
User Interface
One mode selection push button
One reset button

Deliverables
Corrected KiCad schematic
Completed PCB layout
ERC clean
DRC clean
Gerber files
Drill files
BOM
Position file