ATMEGA328-PU (U1) Setup
Power Supply Connections:
Connect U1:VCC to U2:5V@1 (5V power supply).
Connect U1:GND to U2:GND@1 (Ground).
Connect U1:AVCC to U2:5V@2 (Analog Power Supply for better ADC performance).
Multiple GND pins (U2:GND@1, U2:GND@2, U2:GND@3, U2:GND@4) should all be connected to a common ground plane for stability.
Serial Communication for Debugging:
Connect U1:PD0 (RX) to U6:TXD.
Connect U1:PD1 (TX) to U6:RXD. These connections enable serial communication between the microcontroller (ATmega328) and the USB-Serial adapter (CH340N) for programming and debugging.
Sensor Data Acquisition:
Given the components, the MLX90614ESF-ACC-000-SP (U4) is an infrared temperature sensor that could be used for vital detection. It uses an I
2
2
C interface.
Connect U1:PC4 (SDA) to U4:PWM_SDA.
Connect U1:PC5 (SCL) to U4:SCL_Vz. This allows the ATmega328 to communicate with the MLX90614ESF infrared temperature sensor.
Additional Considerations:
An analog-to-digital converter (ADC) or a specialized RF module designed for UWB radar applications would be necessary to capture and process radar signals for detecting human vitals through walls. The MAX270CWP+ (U3) could be used for audio signal processing but may not directly apply to UWB radar signal processing.
Power Supply to Other Components
Connect U6:VCC to U2:5V@1.
Connect U4:VDD to U2:5V@2.
Ensure all components' ground pins are connected to the common ground plane (U2:GND@1, GND@2, GND@3, GND@4)
... show more
