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44. Siren
Build the circuit above. Press the switch (62) and you will hear the siren from the speaker (93). The Three-in-One (11)
contains an Integrated Circuit (IC) that produces the siren sound. An IC is a set of electronic circuits on one small at
piece (or “chip”) of semiconductor material, normally silicon. ICs enable much more complicated circuits to be designed in
orders of magnitude smaller, cheaper, and faster manners than those constructed using discrete electronic components.
1st level
1st level
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