Blog

Notes from building MyDailyTool. Mostly practical references for developers, designers, and anyone who needs a calculator that doesn't lie.

• 2026-06-02 7 min read

  Capacitors in Series vs Parallel: Formulas & Calculator

  Learn how series and parallel capacitors work, when to use each, and how to calculate total capacitance — with formulas, worked examples, and an RC time constant explainer.

  electronicscapacitorcircuitreferenceelectrical
• 2026-05-22 9 min read

  LLM Token Counting: GPT, Claude, Llama & Gemini Explained

  A practical guide to LLM tokens — how they work, why each model counts differently, real cost calculations at scale, and how to count tokens before sending a request.

  llmaitokensdeveloperreference
• 2026-05-08 8 min read

  Regex Cheat Sheet: Patterns Every Dev Should Know

  A practical regex reference — character classes, quantifiers, anchors, groups, and lookaheads — with ready-to-use patterns for emails, URLs, dates, and more.

  regexdeveloperreference
• 2026-05-06 6 min read

  JSON Formatting Guide: Pretty-Print & Validate Like a Pro

  Everything you need to know about JSON formatting — indentation rules, minification for production, common validation errors, and how to convert between JSON and other formats.

  jsondeveloperreference
• 2026-05-03 7 min read

  ISO 8601 Cheat Sheet: Is 24:00 a Valid Time?

  Is 24:00 valid in ISO 8601? Is 18:00? When 00:00 means start vs end of day — quick answers plus a full cheat sheet for dates, times, offsets, and durations.

  datesdeveloperreferenceiso 8601timestamp