AUTOMATIC HAND DRYER WITH TEMPERATURE DISPLAY
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AUTOMATIC HAND DRYER WITH TEMPERATURE DISPLAY
Chapter one
INTRODUCTION
Engineering focuses on goal-oriented initiatives. Projects that can remove issues such as time lag, stress and energy consumption, cost, and environmental risks/hazards.
This project focuses on the design and construction of an automatic hand-dryer with temperature display in order to minimise the dangers and challenges connected with the manual hand-drying procedure while also displaying the temperature of the air used to dry the object.
This project is built using both passive and active components. It is also pure hardwired, meaning it does not employ micro-program control.
1.1 General Description of the Project
This project involves the design and implementation of an automatic hand-dryer with temperature display in numerous blocks, which are then joined to make a single functional unit. The first block of the optocoupler is made up of a laser diode and an LDR, and its output is conditioned by a 74LS132, which generates control logic.
This control logic is utilised to bias a transistor switch, which activates the electromagnetic relay and switches the dryer. The control logic also serves to activate/power the temperature display circuit.
This portion is implemented using an IC linear temperature sensor (LM35), whose output is routed to a quad-comparator with hysteresis. This comparator output resets a frequency generator
which is counted by a 2-digit decimal counting unit and displays the blower’s air temperature in degrees Celsius. The technology dries the hand and displays the temperature on a seven segment display.
1.2 Objectives of the Project
The primary goal of this project is to design and install an automatic hand dryer with temperature display. The initiative also aims to familiarise Computer Engineering graduates with electronic system designs that use digital systems and random logic.
The project’s goal is to familiarise the young graduate with engineering ethics, technical and scientific writing, and the fundamentals of engineering professional activity. It also aims to test/access the young engineers’ abilities to complete engineering projects within a specific time frame.
1.3 Significance of the Study
This project’s design and implementation of an automatic hand dryer with temperature display represents a significant advancement in automation and control. It means a lot in CEE, EEE, Physics, and Electronics.
This concept is a commercially viable product for homes and restaurants. A project of this nature, if appropriately updated, can serve as a temperature control system for the server room, kiln, and oven.
1.4 Scope of the Project
This project focuses on designing and implementing an automatic hand-dryer with temperature display. It includes the following: IC Liner Temperature Sensor (LM 35), Opto-coupler with LDR and laser diodes, decimal counting unit, and Quad-comparator (LM 339).
It includes additional passive and active components employed in the design. The research also examines the method of calculating the basic circuit characteristics employed in the design. This study does not go over the design of the motor used in the hand drier.
1.5 Project Report Organisation
This project report is divided into five chapters to clearly demonstrate the stages required in its implementation. The first chapter includes the system’s introduction and aims, while the second part focuses on the literature review and project-relevant theories.
Chapter 3 concentrates on system design and analysis, while Chapter 4 examines system implementation, testing, and results. The fifth and last chapter discusses the summary and conclusion.
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