Cell phone detector circuit diagram

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This cell phone detector circuit can sense the presence of an activated mobile cell phone from a distance of one and-a-half meters.
If a RF signal is detected the cell phone detector circuit will inform you using a sound alarm (beep sound ) and a blinking LED .

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In this type of circuit (that use high frequency 0.9-3Ghz ) you can not use an LC circuit for frequency tuning  .
The circuit uses a 0.22μF disk capacitor (C3) to according the RF circuit to ensure the capability of the circuit to capture the mobile phone signal .
This cellular phone detector can detect any activity of a mobile phone : incoming or outgoing SMS , video transmission or voice transmission .
The C3 capacitor must have leads length of 18 mm with 8 mm spacing between leads to obtain the desired frequency .  This small disk capacitor acts as a small gigahertz loop antenna to collect the RF signals  .
The CA3130 operational amplifier IC is used as a current to voltage converter .
This cellular phone detector electronic circuit diagram can be used to verify the presence of an active cellular phone in the tested area .

Cell phone detector circuit diagram

Comments

Can i increase the range of

Can i increase the range of detector ,for this what to do

sir . i dont konw the (12k

sir . i dont konw the (12k and 15k resistor ) watts.please tale me these resistor watts.

sir can i connect a jammer

sir can i connect a jammer circuit with that of the cell phone detector circuit?
if so how can i do it?
pls help me sir.

can i use ca3140 because am

can i use ca3140 because am not having ca3130?

why we use this particular

why we use this particular resistor and capacitor for this circuit??where can i get the details calculation

sir,please help me am working

sir,please help me am working with this circuit but i didn't get CA3130 ic in my local area can you show me what can i do pleas help this is my 1st projuct.and what ic is replec this can i use lm741.with regaeds thanks!!!!

how can i increase the

how can i increase the detection distance to atleast 5 meters?

sir, i designed this circuit

sir, i designed this circuit directly in PCB board, but after nw placing the component the led is glowing countinously. i do no y this is so !!!. it costed very much please help me, im waiting for ur mail..

can increase the detection

can increase the detection distance to 10mts ect ? .plz give rly to my mail

This circit is working even

This circit is working even if i switched off all phone. the circuit is beeping even without connecting antenna

The circuit is working

The circuit is working perfectly

Not working for me... The LED

Not working for me...
The LED gets on even there is no cell phone.
So sad :(

i connected thid circuit but

i connected thid circuit but its beeping even no device is found... what can i do plz reply to my email...

Check if is there some other

Check if is there some other devices around; also you can try to shield antenna with an aluminum box and see what is happen.

Yes i got..it's 100%

Yes i got..it's 100% working....thanks a lot admin...thanku very much

I connected this circuit on a

I connected this circuit on a bread board..but when i switched on buzzer is beeping without any device..the output is about 12 without any device.what is the problem ...plz help me

You check the 555 timer IC

You check the 555 timer IC confrigaution & sets according the pin diagram.

plz rply me about advantages

plz rply me about advantages and disadvantages

I've connected this circuit

I've connected this circuit but of electronic alarm and diode works directly during the closure of the circuit without the presence of mobile phones. What is the problem? I need help

Check if is some other device

Check if is some other device close to the circuit.

i want to increase its

i want to increase its distance and capability of the device .
i would to like add a jammer circuit to it. so how can i add to it?

can increase the detection

can increase the detection distance to 10mts ect ? .plz give rly to my mail

Can the project detect the

Can the project detect the individual with a phone?? The network been used? Block transmission? Sense the presence of a phone even wben switched off?

This circuit only works for

This circuit only works for RF signal ,if u want circuit works in off condition .u will use mobile jammer circuit.

This circuit only detect RF

This circuit only detect RF signal, so it can not be used to detect a network or to detect a switched off phone.

i want increase it's

i want increase it's detecting distance....so what should i use???

Every thing is ok but the

Every thing is ok but the circuit is not sensing properly.
Although distance of C3 is 8mm.
Kindly tell me what should i do I have to display my Project after 4 days.

more details of this circuit

more details of this circuit diagram, advantages and disadvantages

Can You please send me all

Can You please send me all the details regarding this project asap ?

i tried building this circuit

i tried building this circuit diagram but it not detecting when i make a phone call i av tried it several times but it not sensing,can you please help me.please help me with the reply through my mail thank you.

Check the C3 capacitor leads

Check the C3 capacitor leads length and spacing

I tried to connect the

I tried to connect the circuit, cell phone dector but it wasnt sensing and i even tried to make some calls but still not responding.
Please put me true by replying me via my email.
Thanks

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