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Household Machines

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BURGLAR ALARM: You Will Need

Breadboard with base, 9V battery and connector, wire strippers, breadboard wire, normally open magnetic switch with magnet, scissors, double-sided adhesive tape, 9V buzzer, LED, NPN transistor, 4011B NAND chip, SPST switch, 220R 10K resistors.

Andy Crawford (c) Dorling Kindersley

ASSET ID - 50295463