FINAL DESIGN TEST · 100 POINTS

Signal Lab: Can Your Partner Decode It?

Build a sound circuit and send a short instruction without speaking or showing the written answer.

Days
8-10

Audience
A partner with the Morse key

Required
First test + revision + final test

Get the planner

Open the editable Signal Lab · Make a Google copyOpen the printable Signal Lab

Your brief

Choose a teacher-approved three- to five-letter message: GO, OK, YES, NO, WAIT, TURN, OPEN, or CLOSE. Translate it into Morse code and send it with short and long sounds.

During the decode: do not speak, point to the answer, mouth the word, or show the written code. Your partner may use the Morse key.

Days 8-10

Build and safely test the speaker or alarm circuit.
Write the message and verify every letter against the Morse key.
Rehearse dots, dashes, and letter spaces.
Run the first blind decode. Record the partner's exact answer.
Revise timing, spacing, volume, or one weak circuit connection.
Run the final decode under the same no-hint rules.

100-point rubric

Criterion	Points	Success
Safe, working circuit	25	Dependable signal demonstrated more than once.
Code accuracy + signal timing	25	Correct Morse with distinct dots, dashes, and spaces.
Partner test + revision	25	Exact first result, specific revision, final result.
Evidence + explanation	25	Circuit evidence and path/switch/speaker explanation.

Submit

✓ Completed Signal Lab planner and test record
✓ Photo or short video proving the circuit produces the signal
✓ Written explanation: The switch ___, which caused ___, so the speaker ___.

Upload the evidence and packet, or use the teacher-approved share-link route.