PC Controlled DC Power Supply (EJ09 - ECE342 - W24)

Our project is a dual-channel DC Power Supply that supply's a voltage range of 2-14 Volts while pulling up to 1.5 Amps while displaying the Voltage, Current, and Power at the load of each channel by an serial channel. The supplied voltage is able to be changed from user input through both button pushes in increments and through a computer by a USB serial connection. In order to implement the above, we used a Raspberry Pi 3b in order to implement a display and interact with our main circuit's IC's. Our main circuit comprised of voltage regulators, digital potentiometers, and Op-Amps in order to create the varied output voltage seen at the end of each channel. Some of our notable accomplishment was the designing of a functional PCB, making an enclosure that meets IP43 standards, and writing the code to interface with multiple SPI devices. Some main challenges that we ran into was the temperature Characteristics of Op-Amps affecting our maximum current at the load, and getting accurate voltage and current readings at the channels.

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Artifacts

Name Description
PCB Layout Footprint layout of voltage divider PCB. The PCB possesses dimensions of 1.14 x 1.97 inch (29.0 x 50.0 mm) and contains 2 copper layers.   Download
Voltage Divider Schematic Schematic diagram of voltage divider circuit. Includes custom symbols for OPA564 and AD8402.   Download
Executive Summary Describes the original problem, our steps in solving it and our project timeline   Download
Project Summary Video Video of Project and design decisions   Download