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Forrest M. Mims III: Vibration Sensor Kit

KIT-VIBSEN: JAMECO KITPRO View Larger Image
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JAMECO KITPRO
Jameco Part no. 2155532
Manufacturer JAMECO KITPRO
Manufacturer no. KIT-VIBSEN
Catalog 152 , page 147
Pricing & Availability

$22.95

# of Unit Price
1+ $22.95
5+ $20.95
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Forrest M. Mims III: Vibration Sensor Kit

The circuit shown here doesn't use any moving parts to detect vibration. Rather, a piezo speaker element is used as a sensitive vibration sensor. Curious how it works? The piezo speaker is connected to the input of an op amp operated as a comparator. This operation is achieved by eliminating the usual feedback resistor between the output (pin 6) and the inverting input (pin 2). In operation, tiny vibrations cause the piezo element to generate a small voltage. The LED glows when the voltage exceeds that applied to pin 3 of the op amp by sensitivity control R2. Visit the Jameco Workshop page for complete build instructions.

About Forrest Mims III

Kit Includes:

Part No.
Qty.
Description
1745688
1
IC, LTC1050CN8, DIP-8
691711
10
1/4 watt resistor, 3.9M Ω
42981
1
1/2 watt potentiometer, 1M Ω
690865
10
1/4 watt resistor, 1k Ω
333973
1
5mm red LED
1956776
1
Piezzo transducer, 90dB, 4500 Hz
11280
1
9 volt battery clip
2120153
1
9 volt battery
51626
1
8-pin IC socket
105794
1
Metal 9V battery clip
---
1
PCB


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