TechCrate 002 — Police Siren
TechCrate 002 — Police SirenConfiguration: --
$20.99
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Build a two-tone police siren with two 555 timer chips and an 8-ohm speaker. Explore how one timer changes the tone produced by the other.
Experiment kit contents
- 555 timer chips
- 1K resistors
- 10K resistors
- 33K resistor
- 100K resistor
- 0.1µF (104) capacitor
- 10µF capacitor
- 100µF capacitor
- 1000µF capacitor
- 8-ohm speaker
From your Starter Kit
Breadboard, 9V battery, Battery snap connector, Jumper wires.
Subscriber instructions PDF · Build video and customer files
Optional — go further
Optional: compare the timing resistor values with power disconnected and explore how they relate to the siren tones. The complete build and its checks work without a meter.
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Watch step-by-step breadboard wiring, oscilloscope waveforms, and circuit verification for experiments in this series.
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