Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control a DC motor, a solenoid valve, and a load cell for weight measurement. The circuit is powered by a 12V battery, regulated to 5V for the logic components, and includes an Arduino UNO microcontroller for control logic. The circuit also features a relay module for switching the solenoid valve and an HX711 module for load cell data acquisition.

Component List

12v Battery

• Description: Provides the main power source for the circuit.
• Pins: - (Negative), + (Positive)

12v to 5v Step Down Power Converter

• Description: Converts the 12V input to a regulated 5V output for powering low-voltage components.
• Pins: VIN 9v-36v, VIN+, VIN-, USB OUTPUT 5V, 5v OUTPUT, GND

Terminal Block (04-01)

• Description: Used for organizing and connecting various wires in the circuit.
• Pins: 1, 2, 3, 4, 5, 6, 7, 8

L298N DC Motor Driver

• Description: Controls the direction and speed of the DC motor.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

1 Channel 5V Relay Module

• Description: Allows for control of high-power devices such as the solenoid valve.
• Pins: VCC+, VCC- (GND), IN, N.O., COM, N.C.

DC Mini Metal Gear Motor

• Description: The actuator controlled by the motor driver.
• Pins: IN1, IN2

Plastic Solenoid Valve

• Description: An electrically-controlled valve used for controlling the flow of liquids.
• Pins: pin1, pin2

Load Cell - Red/white/black/green

• Description: A sensor that measures weight or force.
• Pins: E+, A-, E-, A+

HX711 Weighing Sensor Module

• Description: A precision 24-bit analog-to-digital converter (ADC) designed for weigh scales.
• Pins: B-, B+, A-, A+, E-, E+, VCC, CK/TX, DO/RX, GND

Float Switch

• Description: A sensor used to detect the level of liquid within a tank.
• Pins: GND, Digital Pin

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

Wiring Details

12v Battery

• - connected to GND of the circuit.
• + connected to the 12V input of the circuit.

12v to 5v Step Down Power Converter

• VIN 9v-36v connected to + of the 12v Battery.
• VIN- connected to - of the 12v Battery.
• 5v OUTPUT provides 5V to the circuit.
• GND connected to the GND of the circuit.

Terminal Blocks

• Used to facilitate connections between various components and the power supply.

L298N DC Motor Driver

• 12V connected to + of the 12v Battery.
• GND connected to the GND of the circuit.
• ENA, IN1, IN2, IN3, IN4 controlled by the Arduino UNO.
• OUT1, OUT2 connected to the DC Mini Metal Gear Motor.

1 Channel 5V Relay Module

• VCC+ connected to 5v OUTPUT of the Step Down Power Converter.
• VCC- (GND) connected to GND.
• IN controlled by the Arduino UNO.
• COM connected to + of the 12v Battery.
• N.O. connected to the Plastic Solenoid Valve.

DC Mini Metal Gear Motor

• IN1, IN2 connected to OUT1, OUT2 of the L298N DC Motor Driver.

Plastic Solenoid Valve

• pin1, pin2 connected to the 1 Channel 5V Relay Module.

Load Cell - Red/white/black/green

• E+, A-, E-, A+ connected to the corresponding pins on the HX711 Weighing Sensor Module.

HX711 Weighing Sensor Module

• VCC connected to 5v OUTPUT of the Step Down Power Converter.
• GND connected to the GND of the circuit.
• CK/TX, DO/RX connected to the Arduino UNO.

Float Switch

• GND connected to the GND of the circuit.
• Digital Pin connected to the Arduino UNO.

Arduino UNO

• 5V and GND connected to the power supply.
• Digital pins D2 to D10 used to control and interface with other components.

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Additional Notes

• The provided code is a template and does not contain any functional logic. The user must implement the setup and loop functions to control the circuit's components based on the wiring details and component functionalities.
• The documentation.txt file is empty and does not provide additional information.