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Two electrical tools, side-by-side. See which fits your task.
Electrical
Reference for photoelectric sensors: through-beam, retro-reflective, and diffuse.
Open PhotoelectricYour specific task is pendulum period calc — formula, units, worked example. Open the page, drop your input, get the result — typically under a second.
Your goal is reference for photoelectric sensors: through-beam, retro-reflective, and diffuse. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Pendulum Period focuses on pendulum period calc — formula, units, worked example; Photoelectric focuses on reference for photoelectric sensors: through-beam, retro-reflective, and diffuse. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Pendulum Period and Photoelectric work without signup. We only ask for an email if you decide to subscribe to a paid plan.