The core functionality involves the user inputting the desired quantity via the keypad, which is then displayed on the LCD. The DC actuator, controlled by the Arduino via the relay, dispenses fluid in calibrated pulses. The load cell and HX 711 combination accurately measures the dispensed quantity, ensuring precise delivery.

This system aims to provide a cost-effective and versatile solution for automated dispensing applications, integrating hardware components with Arduino programming for seamless operation. Potential applications include automated beverage dispensers, chemical mixing processes, and pharmaceutical production lines where accurate dosing is critical.

Objectives:

• To design and develop an Automatic Pulse Dispenser (APD) for accurate and controlled liquid dispensing.
• To use an Arduino Uno as the main controller for processing user inputs and controlling the dispensing operation.
• To allow users to enter the desired liquid quantity through a keypad.
• To display the selected quantity, measured weight, and dispensing status on an LCD.
• To control the DC actuator through a relay for automated liquid dispensing.
• To integrate a load cell with the HX711 amplifier to measure the dispensed quantity accurately.
• To implement a feedback-based dispensing mechanism that stops the actuator when the target quantity is reached.
• To reduce manual effort, minimize liquid wastage, and improve dispensing accuracy.
• To develop a cost-effective and versatile system for applications such as beverage dispensing, chemical mixing, and pharmaceutical dosing.

The major building blocks of this project are:

• Power supply.
• Arduino UNO.
• Relay
• Keypad
• Load cell
• HX 711
• DC Actuator
• LCD display.

    Software’s used in the project:

1. ARDUINO IDE compiler for Embedded C programming.
2. Express SCH for Circuit design.

video: