Maker Electronics Math · Chapter 13

How Many Hours Was It Past the Line?

The sum the Long Watch is built to do. Count the readings past a line, multiply by the interval.

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Enter how many readings were past your line, then press Calculate.
From the book — Chapter 13. hours = readings × interval ÷ 3600. That is the whole thing: no extra sensor, no extra storage, no extra current. The node is already taking the readings.

Chapter 13 works this both ways — hours above a damp line, and hours below the humidity a mushroom flush needs. Everything stays in your browser — no sign-up, nothing stored.