Snap Circuits 500-in-1 Manual

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Project #455
OBJECTIVE: Use the whistle chip and relay to make sound.
Turn on the slide switch (S1) and the relay (S3) opens and closes
continuously. This creates an AC voltage across the whistle chip
(WC), causing it to vibrate and sound.
Relay & Buzzer
Project #456 Project #457
OBJECTIVE: Use the speaker and relay to make sound.
Relay & Speaker
OBJECTIVE: Light the bulb using the relay.
Relay & Lamp
Use the circuit from project #455. Replace the whistle chip (WC) with the
speaker (SP). Turn on the slide switch (S1) and now you generate a
louder sound using the speaker.
Use the circuit from project #455. Replace the whistle chip (WC) with the
6V lamp (L2). Turn on the slide switch (S1) and the lamp lights.