ECE 342 Custom Detection Timer

By

Nathan Joo, Jonathan Ruiz Magno and Jesse O

System Design
System Testing
Soldering
PCB
Junior Design
Spring 2026

An embedded countdown timer that only runs while an object stays in front of it. A time-of-flight sensor detects when an object, like a phone, is placed on or near the timer, and the display counts down while it's there. Remove the object and the countdown freezes and a 440 Hz alarm sounds until it's put back. Built around an ESP32 with a laser distance sensor, an OLED display, user buttons, an alarm, and regulated power. The system was split into separate blocks, a sensor, microcontroller, display, user interface, alarm, and power supply, with each one designed and verified on its own before being combined. The team tested it against a set of engineering requirements covering accuracy, response time, detection reliability, and the alarm tone

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Artifacts

Name Description
Project Summary Video A video walking through the Custom Detection Timer, covering the project overview, each team member's blocks, verification results, and a conclusion.   Link
Executive Summary A one-page written summary of the Custom Detection Timer, covering what the system does, how the team approached the design in stages, and what we learned from building and testing it.   Download
System Design Document The full technical document for the Custom Detection Timer, covering the system architecture, block designs, interface specifications, and verification results for each engineering requirement.   Download
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