Mobile phone signal detector

[*zilot*]

Hi

I need some schematic for simply Mobile Phone signal detector. Just to make some alarm when mobile phone in the neighbourhood is switched on.

For example you want to know if somebody around use mobile phone, or so.

Can anybody helpe me, please ??

 

[*zilot*]

Have you (or someone who reads this) realised this little utility.

Do you have some practical hints for realisation ??

Thanks for sharing

 

[mgf]

Hello *Zilot*,

have one unit ready for 900Mhz, and yes its working.
Just one thing: start first with 8 cm of wire for both antennas, and continue cutting mm by mm till good signal sensing.

for 1800Mhz i will try making antenna on pcb, something microstrip.

good luck
mgf

 

[mgf]

Hello *Zilot*,

have one unit ready for 900Mhz, and yes its working.
Just one thing: start first with 8 cm of wire for both antennas, and continue cutting mm by mm till good signal sensing.

for 1800Mhz i will try making antenna on pcb, something microstrip.

good luck
mgf

 

[*zilot*]

Ok

I'll do in that way. Thanks.