Diamond security system in museum with loud 60dB siren
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Intelligent Bike security system with voice alert, flash light indicator and 125dB siren
1Technical Specifications
Domain : Security systems
Power Supply : 12V lead acid Rechargeable Battery(1.3Ah)
Siren : 125Db (6-12v)
Speaker : ...
High Sensitive Metal Detector for Detecting Metal Objects (Better Security System for to Detect Terrorists / Human Bombs)
0Abstract
One of the simplest methods of metal detecting is by beat frequency oscillator. Basically, the circuit consists of two balanced oscillator. One oscillator provides the reference signal, and other oscillator is acting as the detector element. The reference oscillator’s frequency is fixed, while the detector oscillator is variable depending on the presence of a metal. The reference oscillator ...
