copilot

1. ZMPT101B Voltage Sensor Module:
   • Pins:
     • GND: Ground connection.
     • OUT: The analog output voltage that represents the AC voltage being measured.
     • VCC: Power supply for the sensor module.
     • ACN/ACL: Used for measuring the AC voltage input. These are the terminals where you connect the AC voltage to be monitored.
2. [Arduino Nano](Arduino Nano):
   • Digital and Analog I/O Pins:
     • The Arduino Nano has digital pins $D0$ to $D13$ and analog pins $A0$ to $A7$, which can be used for various purposes such as reading the sensor output or controlling other components.
   • Power Pins:
     • $3V3$, $+5V$, VIN: Various power supply pins for different external power requirements.
     • COM/GND: Ground connection pins.
3. P3:
   • A terminal or connector with a single pin named in this schematic, probably for a test point or another simple connection not yet defined.

• Voltage Sensor (ZMPT101B):
  • The ZMPT101B is typically connected to an AC voltage source. It outputs an analog signal corresponding to the sensed AC voltage.
• Arduino Nano:
  • Likely used to read the analog output from the voltage sensor on one of its analog pins (e.g., $A0$). The Arduino can process this signal, converting it into a readable voltage level, which can be used for display, logging, or transmitting to another system.

• The components are listed, but no specific connections between the ZMPT101B, [Arduino Nano](Arduino Nano), and the connector terminal P3 are defined yet.
• There are existing nets, but not all components are connected to them in the project.

1. Connect the ZMPT101B to the Arduino Nano:
   • You would typically connect the VCC of the ZMPT101B to the $+5V$ of the Arduino Nano.
   • Connect the GND of the ZMPT101B to the COM/GND of the Arduino.
   • Connect the OUT of the ZMPT101B to one of the analog input pins of the Arduino (such as $A0$).
2. Define the purpose of P3:
   • Clarify what the single-pin terminal P3 is used for, potentially as an additional input or output point.