Hi I am Sridhar,
This is my first instructable.
This is my mobile detector .
This mobile detector is used to prevent mobile phones in confidential rooms, exam halls, etc,. This mobile detector is used to find the mobile where it is not allowed & the mobile should be in the ON condition. This mobile detector is very useful & cheap . This mobile detector detects the RF transmission signal from the mobiles & this detects even mobile in silent mode.This mobile detector is used to find mobiles by incoming & outgoing calls , SMS , unauthorized video transaction .
Step 1: STEP1: COMPONENTS
3.Resistors at 1/4W
2.2M Ohm -1
1K Ohm -1
100K Ohm - 1
22 pf ceramic -3
0.22uf ceramic -1
0.1 uf polyester/ceramic -1
100uF/25V Electrolytic -1
5.Red LED -1
7.Copper rod -1
Step 2: STEP2:CIRCUIT DIAGRAM
Circuit diagram in the document (doc2.docx)
And make the connection as per shown in circuit diagram.
Step 3: STEP3:FINAL VIEW
This is the final view of the circuit which is made by after connection.
Step 4: STEP4:OUTPUT
Verify before connecting battery.
Connect the battery.
This is the output when the signal comes out from mobile , it detects in fraction of seconds .
It detects the signal from mobile , when the mobile within the radius 2m .
When the signal comes from mobiles the LED blinks .
The LED blinks slowly when the mobile far from mobile detector.
And the LED blinks fastly when the mobile close to detector .
The above files are multisim files.