Mobile phone sniffer – gsm telephone detector
This handy, pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cellphone from a distance of one and-a-half metres. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also useful for detecting the use of mobile phone for spying and unauthorised video transmission.
The circuit can detect both the incoming and outgoing calls, SMS and video transmission even if the mobile phone is kept in the silent mode. The moment the bug detects RF transmission signal from an activated mobile phone, it starts sounding a beep alarm and the LED blinks. The alarm continues until the signal transmission ceases.
Cellphone sniffer circuit diagram
Read the rest here – gsm sniffer
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about 1 year ago
please send the circuit for my mail
about 1 year ago
Hi………..
Can you send me the ckt diagram & description of above mentioned ckt.
I want to do the project.
about 1 year ago
what a wonderful project. can you mail the schematics and components and their ratings to my email. thanks
about 1 year ago
can this sniffer be used to put a phone within it’s range to standby mode. pls send the schematic to my email provided. well done
about 12 months ago
Will this device detect cell phones in the presence of WIFI?
about 4 months ago
Yes. Mobile phone radiation will be in the range 2.5-3.5GHz.
D.MOHANKUMAR
about 10 months ago
whats the frequecy range of the signal coming from a cellular phone that it can detect?
about 4 months ago
Mobile phones uses radiation between 2.5 – 3.5 GHz in the microwave range.
D.MOHANKUMAR
about 8 months ago
How d area can be increased?
about 4 months ago
with this design, range will be maximum 2 meters radius
d.mohankumar(author)
about 7 months ago
I want detail information about GSM sniffer.
about 4 months ago
Mail me dmohankumarwc@gmail.com
D.MOHANKUMAR
about 7 months ago
how can i increase the area?can phones in south africa be detected?
about 4 months ago
With this simple design it is difficult to increase range more than 2 meters. Circuit is suItable for all GSM phones.
D.MOHANKUMAR
about 7 months ago
How does it works & will it detect the active mobile if it is in use or in idle condition also?
about 6 months ago
Ckt of GSM Sniffer is very simple&also useful for me.
about 4 months ago
hi…
i’am doing b-tech & taken this project as my mini proj.
i have designed it but its not working properly…..so can u help me. plz its urgent till 29th oct…..
about 4 months ago
can u also tell me the frequency range off cell phones that it can detect
about 6 months ago
tell me more about d G.S.M sniffer.can this device be use in Nigeria and on any mobile phone.
about 4 months ago
can u tell me if mobile is switch off condition how will u detect?
about 4 months ago
this gsm detector will not detect mobile phones that are turned off.
about 4 months ago
In the switch off condition, the circuit will not detect the signal, since there is no signal from the phone
D.MOHANKUMAR
about 4 months ago
Details and the trouble shooting is given in the blog of web site http:/electronicsprojects.mediadir.in
D.Mohankumar
Author
about 4 months ago
The circuit Mobile Bug is well tested and working properly. It was published in Electronics for You Magazine(INDIA).
D.MOHANKUMAR(Author)
Sel.Gr.Lecturer in Zoology
Govt.College for Women
Trivandrum,Kerala,India