Studying with electronics-engineering
Every lesson is also a notebook: mark what you understood, take notes, ask AI when a step does not add up and find everything in "My study". It is free and needs no sign-up.
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Mark each section
Under every heading of a lesson (and under every exercise) there are three buttons: ✓ Got it, ↻ Review, ? Not clear. One click marks the section; a second click removes the mark.
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Take notes
✎ Note opens a box for your notes on that section: it saves itself as you type. At the end of the lesson there is also room for general notes.
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Ask AI
✦ Ask AI opens ChatGPT or Claude (your choice) with the question already written and the text of the section: "explain it more simply", "give me an example", "give me an exercise", "where is it used?". You use your own free account. At the end, "Share" gives you the link of the conversation: paste it in your notes and find it whenever you want.
AI can be wrong, especially with calculations: always check with the lesson.
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Not clear? Ask the author
When you mark "Not clear", an "Ask a question" button appears: it takes you to the comments with the section name already written. Questions get a personal answer.
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Download as PDF
"Download PDF", next to the lesson date, creates a PDF laid out like a book: formulas, figures, code, exercise solutions and page numbers. In the window that opens choose "Save as PDF". There is also a PDF of your notes.
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Find everything in "My study"
From the cap at the top right: how many lessons you studied and completed, the sections to review (oldest first), those not clear, your progress in the courses, your notes with search, your study time this week. Every number leads to its details.
Try it here
A sample section with the real buttons. What you do here is only a test and is not saved.
Example: Ohm's law
In a conductor the current is proportional to the applied voltage: V = R·I. With 12 V across a 4 Ω resistor, 3 A flow.
Frequently asked questions
Is it free? Do I need to sign up?
It is free and needs no sign-up: it works straight away, in every lesson.
Where does my data go?
It stays only in your browser, on this device: the site does not receive it. If you clear the site's browsing data, it is deleted too.
Can I use it on computer and phone?
Yes: in "My study" download a copy of your data on one device and load it on the other.
Is the AI reliable?
It helps a lot to understand, but it can be wrong, especially with calculations. Check with the lesson and, if a doubt remains, ask in the comments.
