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DIY – Lazer Alarm Electricity Kit – Tested & Verified (Educational projects and learning DIY kit)
| Parameter | Value |
|---|---|
| Operating Voltage | 6V – 9V DC |
| Laser Output Power | < 5mW (Class 2 laser — low-power, eye-safe under normal use) |
| Laser Wavelength | ~650nm (visible red) |
| Sensing Component | LDR (Photoresistor), resistance range ~1kΩ (light) to ~1MΩ (dark) |
| Switching Component | NPN Transistor(s) — acts as electronic trigger for buzzer/LED |
| Output Indicator | Buzzer (audible alarm) + LED (visual alarm) |
| Circuit Type | Analog, beam-interruption 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 laser beam to LDR is blocked/interrupted |
| Weight | 0.25 kg |
|---|
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