The development of ARM-based portable and adaptable power supply
Author: Tomislav Brlek
Subject: Advanced Programmable Electronic Systems
Mentor: Assoc. prof. Matej Rojc, PhD
Degree: 2
Date: 2019
DKUM: *
This master’s thesis describes a development of a portable and adjustable power supply.
This master’s thesis describes a development of a portable and adjustable power supply. The first part of the thesis introduces us to the working principle of power supplies in general. Next, we present a functional design of a portable and adjustable power supply and a list of its required functionalities. Chapter “switched-mode power supplies” introduces us to the theoretical basics of the said power supplies, while chapter “linear regulators” introduces us to different types of linear regulators and tells us more about how they work. Everything regarding which microcontroller was used and why it was used is described in the “ARM microcontroller” chapter. Besides microcontrollers, it also talks about which integrated development environment is used and how the microcontroller is programmed. A full and detailed description of each part of the analog circuitry can be found in the chapter “describing the development of the portable and adjustable power supply”. Lastly, the user interface is described in detail.
In the first part of the thesis we present the existing laboratory power supplies and how they work. In the functional scheme we have defined all those parameters that such power supplies also include. In the following sections, we also introduce the various switching power supplies. In the chapter on linear regulators, we present the operation of linear regulators. In the chapter on ARM microcontrollers we present why we chose the ARM microcontroller and also why the STM32L433RCT6. In the section on developing a portable and customizable power supply, we give a detailed introduction of the power supply development from the very design to the design and prototype. In the user interface, we also introduce only the use of the screen, respectively. setting options and how data is displayed. We finish the task with the results.
Based on the design of the existing power supplies mentioned in the previous section, we propose a new design for an advanced configurable power source. The aim of the master’s thesis is to develop a comprehensive, small, affordable, efficient, adjustable and portable power supply. The proposed design will be as secure as other power supplies, making it more useful for users when powering different electronic systems when no network power is available nearby. In the chapter that addresses the development of a portable and adjustable power supply, we detail the individual electronic components that serve to perform the desired mode of operation. The development of the power supply includes two major components: a fixed voltage control part and a variable voltage power supply. The control part includes those circuits that are required for the desired control of the power supply from the user’s point of view. The variable-voltage power supply covers all those circuits that are required for proper voltage transformations from input to output. For displaying voltage and current data, we chose a screen with a diagonal of 8.128 cm and a built-in touch screen. We used a 16 bit parallel protocol to communicate with the screen. We have also implemented an encoder that allows us to set user-friendly voltage or current values at the output of the power source.
Discussion and Results
