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Pressure-Sensitive Alarm

Pressure-Sensitive Alarm

+4238IC1LM5557615O/PVCCR1216IC2401714158131216IC340171415813VR14.7KVR2100KC1C20.01μGND+6VTO+12VR2100Ω0.5WT1BC547R11KT2SL100LS18Ω, 0.5WSPEAKERC4100μ25VC30.1μGNDPressure-Sensitive Alarm
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publish time: 2020-10-23
Circuit Everyday

This is a low - cost pressure - sensitive burglar alarm.The alarm USES a homemade pressure sensor that ACTS as a variable capacitor, using two copper clad plates and a sponge between them.

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