Power on mobile phone detector circuit
Source: InternetPublisher:Lemontree Keywords: mobile phone detector Updated: 2021/10/29
Circuit working principle: This circuit can detect any
transmission signal of calls, short messages and videos , even if the mobile phone is in silent mode. Once the circuit detects the radio frequency transmission signal
from the powered-on mobile phone , it will immediately sound an alarm and drive the LED
to flash. The frequency band used by mobile phones is 0.9-3 GHz and the wavelength is 3.3-10 cm, so the detector circuit
designed in this article should have the ability to detect the gigahertz frequency band.
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