Morse code quiz

1. 1

   Pick a mode: Hear it, Read the code, Find the code or Flashcards.

2. 2

   Under the quiz, pick the characters: Letters and numbers, Letters A–Z, Numbers 0–9 or Punctuation.

3. 3

   For a timed test, set the time limit to 10 s or 5 s a question.

4. 4

   Press Start and pick an answer with a tap, its own key (a letter, digit or mark), or 1 to 4 when no answer is a digit; Enter goes to the next question. Stop ends a round early.

5. 5

   After ten questions, read your score, then press Practice the missed ones.

6. 6

   For flashcards, choose what the front shows (Letter, Code or Sound), turn the card and say whether you knew it.

• Three ways to be tested. Hear it plays a character and asks which one it was. Read the code shows dots and dashes. Find the code shows a character and asks for its code.

• Answers that look alike. The three wrong answers have codes of about the same length as the right one, so you cannot pick it by its size.

• A timed test. Set 10 or 5 seconds a question; no answer in time counts as a miss.

• Drill what you missed. The round ends with your misses, their codes and their sound, and one button that quizzes just those.

• Flashcards. A letter, a code or a sound on the front; your “I knew it” or “I didn’t” counts like an answer.

• Progress that stays. Every answer goes into your accuracy, today’s goal and the daily review, kept on this device. Your best score is kept for each mode, set and time limit, and the characters you missed wait on the start screen until you get them right.

Each round asks ten questions drawn at random from the set you chose; with fewer than ten characters to ask, some come up twice.

For each question the quiz shuffles the other characters of the set and keeps the three whose codes are closest in length to the answer: the same number of dots and dashes first, then one more or one fewer. In Numbers every code has five elements, so all four choices are the same length.

With a time limit, the clock starts when the question appears; in Hear it the character plays inside that time. When it runs out, the question is marked wrong and shows the answer.

Hear it plays each character at the speed in the sound settings, 20 WPM to start. The timing follows ITU-R M.1677-1: a dot is one unit, a dash three, and the gap inside a character one.

Speed is counted on the word PARIS, so a unit lasts 1,200 ÷ WPM milliseconds: at 20 WPM, 60 ms, and Q (--.-) takes 780 ms. The punctuation set holds the 13 marks of that standard: . , : ? ' - / ( ) " = + @.

The score is the right answers out of ten, also as a percentage; the longest run counts right answers in a row. A miss also brings that character back in the daily review ten minutes later.

What a score means, and what to do next (the round screen gives the same advice):