Energy Conversion Design Challenge

Design, test, and improve a warning device that changes electrical energy into light, sound, or motion.

Your Challenge

A bicycle rider needs a warning device that other people can notice. Build a device that creates a useful signal.

Criteria:

The circuit must be complete.
The device must create light, sound, or motion.
The signal strength must reach at least 60.

Constraints:

Use one power source.
Use one switch.
Use one output device.
Spend no more than 10 points.

Component Shop

Budget used: 0 / 10

Power Source

🔋

Small Battery

Cost: 2 · Power: 50

🔋

Large Battery

Cost: 4 · Power: 90

Switch

🎚️

On/Off Switch

Cost: 1

Output Device

💡

Light Bulb

Cost: 3 · Creates light

🔔

Buzzer

Cost: 3 · Creates sound

⚙️

Motor

Cost: 3 · Creates motion

Optional Improvement

🪞

Light Reflector

Cost: 2 · Makes light easier to see

📣

Sound Horn

Cost: 2 · Makes sound louder

🚩

Motor Flag

Cost: 2 · Makes motion easier to see

Design Workspace

Drag one component into each required slot. The improvement slot is optional. Close the switch before testing the device.

1. Power Source

Drag a battery here

2. Switch

Drag a switch here

3. Output Device

Drag an output here

4. Improvement

Optional component

Circuit switch: No electricity can flow.

⚡

Build a device and press Test Design.

Electrical energy → Choose an output device

What energy output do you predict?

Why do you think the device will produce that output?

Design Comparison

Save your first tested design. Then change at least one component, test the new design, and save it as your improved design.

Design	Power Source	Output	Improvement	Cost	Signal Strength	Met Criteria?
First Design	—	—	—	—	—	—
Improved Design	—	—	—	—	—	—

Energy Conversion Design Challenge

Design Workspace

Test Results

Design Comparison

Explain Your Improvement