• on Test & Measurement
  • Published in issue 6/2014 on page 26
About the article

Seismic Detector

Seismic Detector
This simple circuit generates acoustic and visual alarms when it detects a shock, vibration or earthquake. It also has a relay that can be used to energize other devices or external indicators.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component List
R1 = 82kOhm
R2 = 470kOhm
R3 = 100kOhm
R4 = 1kOhm
R5 = 100Ohm
P1 = 100kOhm trimpot
C1 = 4.7µF 16V
C2 = 100nF
D1,D2,D3,D4 = 1N4148
LED1 = LED, low-current, red, 3mm
T1 = BC547
IC1 = MCP601 (Microchip)
IC2 = 74HC132
BZ1 = active piezo buzzer, e.g. Multicomp MCKPT-G1210-3916
S1 = pushbutton with break contact
RE1 = PCB relay, 3V (e.g. Omron G5V2H13DC)
Sensor = LDTM-028K (Measurement Specialties)
PCB # 130517-1 [1]

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