The Automatic Pulse Dispenser (APD) is designed to dispense liquids with precision based on user-defined parameters. The system integrates an Arduino Uno microcontroller, a keypad for user input, an LCD for displaying information, relays for controlling two DC actuators, a load cell for weight measurement, an HX711 amplifier for accurate data acquisition, and a thermal printer for printing transaction details. Users input the desired quantity in grams, which is then displayed on the LCD. The actuators dispense fluid in controlled pulses, while the load cell continuously monitors the weight. Once the target weight is reached, the actuators automatically shut off to ensure accurate dispensing. Additionally, the thermal printer prints a receipt containing the weight and cost of the dispensed liquid. The APD provides a cost-effective and reliable solution for various applications, including automated beverage dispensers, chemical mixing, and pharmaceutical dosing, where precision is essential.    

The major building blocks of this project are:

• Power supply.
• Arduino UNO.
• TWO Relays.
• Keypad
• Load cell
• HX 711
• TWO DC Actuators.
• Thermal printer.
• LCD display.

      Software’s used in the project:  

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

       

Regulated Power Supply:

 

BLOCK DIAGRAM:

video: