Idunno
4th May 2002, 18:22
Here's an interesting little gizmo. Found it in a magazine called "How to wind up a moderator". The website is www.crayola.com and the full plans for the instrument are available on their website under the 'mini projects' link.
Could be very useful to pilots! Anyone know how much it would cost to get one built? I'm not an electronics person myself. Any volunteers to build one?
Mobile Phone Sniffer
track down mobile phones using this handy directional finder
Design by B. Kainka
In some situations and locations, the use of a mobile phone is forbidden. You may be discussing sensitive information in a closed meeting or holding important exams. How can you be sure that a concealed phone is not being used to pass information outside? Maybe you’re just curious and would like to know if someone nearby is using a phone. This neat unit will not only detect the presence of mobile phone activity (voice or text), it can home in on the culprit!
If you are not familiar with the characteristic RF pulses sent out by a mobile cell phone just go over to an FM radio and switch the mobile on or off while holding it close to the radio aerial. These radio frequency (RF) pulses are an annoyance to amateur radio enthusiasts because they always seem to be picked up by sensitive input stages and you sometimes hear them on Outside Broadcast television programmes where people close to the presenter are using a mobile.
Detecting these pulses is not difficult;
edited by What_does_this_button_do?
Could be very useful to pilots! Anyone know how much it would cost to get one built? I'm not an electronics person myself. Any volunteers to build one?
Mobile Phone Sniffer
track down mobile phones using this handy directional finder
Design by B. Kainka
In some situations and locations, the use of a mobile phone is forbidden. You may be discussing sensitive information in a closed meeting or holding important exams. How can you be sure that a concealed phone is not being used to pass information outside? Maybe you’re just curious and would like to know if someone nearby is using a phone. This neat unit will not only detect the presence of mobile phone activity (voice or text), it can home in on the culprit!
If you are not familiar with the characteristic RF pulses sent out by a mobile cell phone just go over to an FM radio and switch the mobile on or off while holding it close to the radio aerial. These radio frequency (RF) pulses are an annoyance to amateur radio enthusiasts because they always seem to be picked up by sensitive input stages and you sometimes hear them on Outside Broadcast television programmes where people close to the presenter are using a mobile.
Detecting these pulses is not difficult;
edited by What_does_this_button_do?