System & utilities
Flashlight with strobe and SOS
Drives the camera LED as a torch, with a strobe mode and an SOS pattern in Morse code.
At a glance
| Sensor used | Camera LED (an output, not a sensor) |
|---|---|
| Unit | On, strobe, or SOS pattern |
| Useful range | Bounded by LED brightness and battery |
| Cannot do | Run while another app has exclusive use of the camera |
How it works
The mechanism, not the marketing.
Android exposes the camera flash as a torch that can be switched on independently of taking a photo. Strobe toggles it at a set interval; SOS sends the Morse pattern for distress — three short, three long, three short.
Honest limits
What a phone cannot do here.
- Strobe lighting can trigger seizures in people with photosensitive epilepsy. Use it with care around others.
- The LED and driver warm up under sustained use, and some devices dim the torch to manage heat.
- If another app holds the camera, the torch may be unavailable until it is released.
Questions
Does the strobe drain the battery?
Less than a constant torch, since the LED is off much of the time, but the flash is one of the more power-hungry components either way.
What does the SOS pattern send?
Morse code for SOS — three short flashes, three long, three short — the internationally recognised distress signal.
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