EE · Power · Energy systems
jperc is where electrical engineering becomes understandable: clear lessons, practical tools, and real project thinking—all built in public as the channel grows.
The idea
Don’t wait until you know everything.
Learn one thing. Explain it clearly. Build the next thing.
Latest lessons
Digital systems 101
Digital systems 101
Electrical fundamentals
jperc resources
This section will grow as new resources are created. The first worksheet will support the newest binary arithmetic lesson.
A practice worksheet for binary addition, subtraction, multiplication, and division is being built to accompany the newest lesson.
Tool 001 · Energy fundamentals
Turn watts and time into watt-hours and kilowatt-hours. It runs entirely in your browser—no downloads and no data collection.
Power tells you the rate electricity is being used. Energy tells you how much was used over time.
The roadmap
Each stage supports the next, so the channel becomes a record of real learning—not a highlight reel made after the work is done.
Make electrical and digital-systems fundamentals clear enough to use, not just memorize.
Connect the fundamentals to the equipment and systems that power real buildings.
Turn each lesson into a documented, software-based engineering case study.
Build toward power systems, solar, batteries, and more efficient energy infrastructure.
Current build · Project 001
A conceptual case study exploring how a commercial building uses electricity, what creates peak demand, and which retrofit ideas could be worth investigating.
Utility data Foundation set
✓Baseline analysis Building now
→Retrofit ideas Next brick
·Case study + video Share the result
·Follow the build
Follow jperc as the lessons get clearer, the projects get deeper, and this site grows alongside the channel.
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