Visual Learning machine
Smoke alarm: a sensor that sees in the dark
By @elvar_official, part of Visual Learning. A light and a sensor that only see each other when there is smoke.
Made with ClaudeEnglishFreeNo account
Open on its siteThe question it answers
How does an alarm see smoke if everything inside is dark?
The steps
- 1Clean air
- 2The toast burns
- 3Into the maze
- 4The light scatters
- 5Alarm
- 6The air clears
- 7Test button
The big idea: Inside there is a dark maze where a light and a sensor never see each other. Smoke scatters the light into the corner, and when it blocks 2.5% of the light per foot, the alarm sounds.
The question, steps and idea are translated from the original site.
What it is
An optical sensor from the inside: a dark chamber, a light and a sensor that never face each other. You see how smoke scatters the light toward the sensor and how the alarm decides when to sound.
- Visual Learning machine 9
- Step-by-step and Auto mode
Use it on the roadmap
- Stage 3. Motors, drivers and sensors
How a light sensor detects something without contact and when it decides to trigger.
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