DIY – Earthquake Alarm Kit – Tested & Verified (Educational projects and learning DIY kit)
| Parameter | Value |
|---|---|
| Operating Voltage | 6V – 9V DC |
| Sensing Component | Vibration/tilt sensor (spring or ball-contact type) |
| Switching Component | NPN Transistor(s) — amplifies sensor trigger to drive alarm output |
| Output Indicator | Buzzer (audible alarm) + LED (visual alarm) |
| Circuit Type | Analog, vibration-triggered switching circuit |
| Assembly Type | Breadboard-based (no soldering required) or PCB-based (soldering variant) |
| Power Source | 9V battery (not always included — confirm inclusion) |
| Trigger Response | Alarm activates when the sensor detects shaking, tilt, or sudden movement |
| Weight | 0.25 kg |
|---|
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