Visual Morse code practice with light
When headphones aren’t allowed — or hearing isn’t the channel — use light. Start with the flashlight tool, learn the SOS blink, and keep the translator handy for text. Sound tools remain one click away if you want both.
When to use
Silent practice; demos; accessibility-minded drills; camping-table flashlight play (safely); classrooms where audio isn’t an option.
When not
Don’t strobe at people who didn’t consent; photosensitive users need an obvious Stop. Don’t signal toward roads or aircraft for fun. Not emergency certification.
Assumptions
Screen flash is primary; vibration optional; LED torch best-effort. “Visual trainer” in v1 routes to light tools + the same learning stack — not a separate Koch engine.
Examples
Input
Fullscreen SOS at slow WPM in a dark room
Result
Clear short/long blinks (practice only)
Input
Flash OK · watch letter gaps
Result
Looks like letters, not random disco
Input
Vibration on (where supported)
Result
Feel the schedule without sound
How it works
- Open flashlight with a short message at slow WPM.
- Try the SOS preset for a known rhythm.
- Add audio on the audio translator if you want both channels.
Flashlight message → SOS preset → optional audio twin on audio-translator
Gotchas
- Phone auto-brightness fights you — lock brightness when possible.
- “Visual trainer” is not a separate Koch engine in v1 — it routes to light tools + the same learning stack.
- Never signal toward roads or aircraft for fun.
- iOS may limit vibration/torch — screen flash is the reliable path.
Compare
When sound isn’t the channel
Headphones banned, hearing isn’t available, or you want a silent demo — start with flashlight, learn the SOS blink, keep the translator for text. Sound tools remain one click away ( audio translator).
v1 honesty
“Visual trainer” here routes to light tools plus the same learning stack — not a separate Koch engine with a different alphabet. Screen flash is primary; vibration optional; torch LED best-effort.
Safety
Don’t strobe at people who didn’t consent. Photosensitive users need Stop. Never signal toward roads or aircraft for fun. Practice only.
Common questions
Direct answers — no synonym padding.
Related tools
Practice tool only — not a license exam, not emergency training certification. See Methodology and Terms.