Mukesh Kumar Mehto
The basic idea of the automated Softdrink dispenser is that it allows the user to select one out of three options (small, medium and large) for the amount of liquid as desired. The 8085 microprocessor constantly monitors the switches and looks for the moment when any of the switches is pressed. Then the microprocessor inputs the data and detects which switch is pressed. After it knows which switch is pressed, it just has to put the SOD (Serial Output Data) pin on high state for the corresponding time. The SOD pin is connected to a darlington pair which is then used to control the pump at the output.