tobulab

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Last updated on Nov 7, 2026
Pasin Toburankajornsang

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Pasin Toburankajornsang

About tobulab

Planners, worksheets, spreadsheets and templates

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On Etsy since 2026

Planners, worksheets, spreadsheets and templates

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Digital downloads, and each listing says what we tested

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Last updated on Nov 7, 2026

Frequently asked questions

How do I get my files?

Right after payment, Etsy shows a download link on your purchase page and emails it to you. You can download again any time from You > Purchases. Nothing is shipped.

Have the spreadsheets been tried in Google Sheets?

Google Sheets has not been tried for these files. Each workbook is an .xlsx with no macros, and the listing's Compatibility section says which apps were used in testing.

Are the PE practice problems real exam questions?

No. They are original exam-style problems written for practice. Not affiliated with or endorsed by NCEES, and no guarantee of exam results.

Which standards do the calculators follow?

Cable sizing follows the IEC 60364-5-52 method. Current ratings are calculated with the IEC 60287 thermal method with safe-side margins, not copied from any standard's tables, and you can type your own local table value for any circuit. These are estimation aids: always verify against your local wiring rules and a qualified engineer. Not affiliated with IEC.

Can I share or resell the files?

Please don't. Your purchase is a personal licence: use the files for your own study and your own projects, but don't share, upload or resell them.

Something doesn't work. What now?

Send us a message through Etsy and tell us what you see (a screenshot helps). We'll fix the file or help you set it up.

Which apps work with the digital planners?

They are hyperlinked PDFs made for note apps that keep links, such as GoodNotes or Notability. Scripts tested the links in the file. Each listing says whether a real note app has been tried.

Can I print the worksheets on A4 paper?

Most sets include US Letter and A4 PDFs. The listing says which sizes are in the set. A test print has not been recorded unless the listing says so.

Is this financial, tax or engineering advice?

No. Our files are planning, record-keeping and practice tools. Check results with a qualified adviser, your lender's statements or your local code.

Have the fillable PDF binders been tried in a PDF app?

Not yet. A script typed into every field, saved the file and read each entry back. Adobe Acrobat Reader, Preview and other PDF apps have not been tried, and neither has a test print. Each listing says what was tested. You can also print the blank pages and write by hand.