Circuit Documentation

Summary

This circuit involves two Arduino UNO microcontrollers, a Raspberry Pi 4B, a relay module, a water pump, and a water flow sensor. The circuit is designed to control the water pump based on signals from the water flow sensor, with the relay module acting as a switch. The Raspberry Pi 4B is used for additional control and monitoring.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

Raspberry Pi 4B

• Description: A small single-board computer.
• Pins: 3V3, 5V, GPIO2, GPIO3, GND, GPIO4, GPIO14, GPIO15, GPIO17, GPIO18, GPIO27, GPIO22, GPIO23, GPIO24, GPIO10, GPIO9, GPIO25, GPIO11, GPIO8, GPIO7, ID_SD, GPIO5, GPIO6, GPIO12, GPIO13, GPIO19, GPIO16, GPIO26, GPIO20, GPIO21, ID_SC, TR01_TAP, TR00_TAP, TR03_TAP, TR02_TAP, RUN, GLOBAL_EN

Relay Module 5V-30V

• Description: A relay module used to control high voltage devices.
• Pins: common contact, normally open, normally closed, trigger, V-, V+

Water Pump

• Description: A pump used to move water.
• Pins: VCC, GND

Water Flow Sensor

• Description: A sensor used to measure the flow rate of water.
• Pins: Signal, Vcc, GND

Wiring Details

Arduino UNO (1)

• GND connected to:

  • Raspberry Pi 4B GND
  • Relay module 5V-30V V-
  • Arduino UNO (2) GND

• 5V connected to:

  • Relay module 5V-30V V+

• A5 connected to:

  • Arduino UNO (2) A5
  • Raspberry Pi 4B GPIO3

• A4 connected to:

  • Arduino UNO (2) A4
  • Raspberry Pi 4B GPIO2

• D8 connected to:

  • Relay module 5V-30V trigger

Arduino UNO (2)

• GND connected to:

  • Raspberry Pi 4B GND
  • Relay module 5V-30V V-
  • Arduino UNO (1) GND
  • Water flow sensor GND

• 5V connected to:

  • Water flow sensor Vcc

• A5 connected to:

  • Arduino UNO (1) A5
  • Raspberry Pi 4B GPIO3

• A4 connected to:

  • Arduino UNO (1) A4
  • Raspberry Pi 4B GPIO2

• D2 connected to:

  • Water flow sensor Signal

Raspberry Pi 4B

• GND connected to:

  • Arduino UNO (1) GND
  • Arduino UNO (2) GND
  • Relay module 5V-30V V-

• GPIO3 connected to:

  • Arduino UNO (1) A5
  • Arduino UNO (2) A5

• GPIO2 connected to:

  • Arduino UNO (1) A4
  • Arduino UNO (2) A4

Relay Module 5V-30V

• V- connected to:

  • Raspberry Pi 4B GND
  • Arduino UNO (1) GND
  • Arduino UNO (2) GND

• V+ connected to:

  • Arduino UNO (1) 5V

• trigger connected to:

  • Arduino UNO (1) D8

• common contact connected to:

  • Water Pump VCC

• normally open connected to:

  • Water Pump GND

Water Pump

• VCC connected to:

  • Relay module 5V-30V common contact

• GND connected to:

  • Relay module 5V-30V normally open

Water Flow Sensor

• Vcc connected to:

  • Arduino UNO (2) 5V

• GND connected to:

  • Arduino UNO (2) GND

• Signal connected to:

  • Arduino UNO (2) D2

Documented Code

Arduino UNO (1)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Arduino UNO (2)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the microcontrollers.