Developer Builds Browser-Based Morse Code Translator Using Plain JavaScript

·1 views

A developer has created a fully functional Morse code translator that runs entirely in the browser using plain JavaScript and the Web Audio API, with no frameworks or build tools required. The tool converts text to Morse code and back using a simple lookup table, while generating audio tones programmatically without any audio files. Accurate timing of dots, dashes, and silences — following standard Morse ratios — was key to making the audio sound authentic. The finished project includes adjustable speed settings, a synced visual light indicator, Farnsworth timing for learners, and an image-based Morse decoder. The developer describes the project as a practical weekend build that covers data structures, async timing, and browser audio APIs in one compact challenge.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

How to Clean Excel Data Before Converting It to SQL INSERT Statements

Transferring data from Excel to a SQL database is prone to errors when source data is inconsistent or poorly formatted. Common issues include numbers stored as text, mixed date formats, special characters, leading or trailing spaces, and empty cells that are not properly normalized to NULL values. These inconsistencies trigger SQL errors such as data type conversion failures or string truncation warnings, which can corrupt databases and require hours of debugging. Developers have traditionally relied on Excel formulas, Find and Replace tools, and VBA macros to clean data, though these methods are time-consuming and require coding expertise. A structured pre-conversion cleaning process — addressing data types, duplicates, encoding issues, and irregular table layouts — is recommended to ensure reliable and error-free SQL imports.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

Three-Tier Autonomy Framework Emerges as Safe Standard for AI Media-Buying Agents

As AI agents become more capable of managing advertising spend autonomously, a three-tier framework has emerged from production deployments to balance efficiency with oversight. At Level 1, the agent only surfaces recommendations while a human retains full decision-making authority; at Level 2, the human approves actions before the agent executes them. Level 3 allows the agent to act independently, but only within tightly defined KPI boundaries and with kill switches in place. Full autonomy has repeatedly failed in real-world use, with agents misreading bot traffic, misjudging temporary performance dips, or generating policy-violating creatives. Operators in regulated industries such as finance, iGaming, and healthcare are advised to avoid L3 entirely until at least three months of reliable L1 and L2 data have been established.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

ChangelogPro Generates Release Notes Locally in Browser Using On-Device AI

A developer has built ChangelogPro, a browser-based tool that converts raw git commit messages into structured release notes without sending any data to external servers. The tool uses an on-device AI model powered by WebGPU, meaning all processing happens locally in the user's RAM rather than on a cloud platform. Users paste their git log output into the tool, which then categorizes commits into user-facing features, fixes, and internal chores automatically. The approach eliminates API costs, rate limits, and privacy concerns that come with third-party SaaS changelog tools. The tool also works offline after the initial load, though it requires a modern browser and sufficient local hardware to run inference.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

How a PHP/Symfony Developer Handles Dependency Injection After Switching to Go

Software engineer Anton, who works primarily in PHP/Symfony and Go, is in the process of migrating a live PHP monolith into Go microservices. In a detailed technical writeup, he reflects on Symfony's dependency injection container as the feature he missed most during the transition. He breaks down six core capabilities of Symfony's DI system — including autowiring, service decoration, lazy loading, and compiled containers — analyzing both what each feature provides and what complexity it conceals. The compiled container, he notes, is particularly valuable because it catches missing or ambiguous dependencies at build time rather than during live requests. Having moved past the comparison, Anton describes what he built in Go instead, emphasizing that his approach is specific to his own codebase and not intended as general advice.

0 comments Read more at DEV Community