SIMPLE MOBILE PHONE DETECTOR:
It is a device that detects the mobile phone which is near to it. It detects based on the frequencies that are generated
from the mobile when a call is received by the user or a call is made by the user using a mobile phone.
SIMPLE MOBILE PHONE DETECTOR will detects only when there is call going on or SMS received /sending . We can say easily as at the time of communication we can detect .
- CA 3130 IC
- 1K ohm resistor
- 100K resistor
- 2.2M resistor
- 47 piko farad capacitor
- 0.22 micro farad capacitor
- 100 micro farad capacitor
- BC 548 transistor
- 9V battery
- Bread board
Insert the CA 3130 IC on the beard board.
Insert the transistor on the bread board and connect the 6 th pin of ic to the base of the transistor.
Connect the collector of the ic to the 1k resistor
Insert the led on the bread board and connect the connect the +ve terminal of the led to the emitter of the transistor.
Connect the 2nd pin of the ic to the base of the transistor using a 2.2M ohm resistor.
Connect the pin 3 of the ic to the 100k ohm resistor.
Insert the 100 micro farad capacitor such that the anode of the capacitor is connected to the 3rd pin of the transistor.
Connect the 2.2 M ohm resistor to the 3rd pin of the ic.
Connect the 2nd pin and the 3rd pin of the ic using the 0.22 micro farad capacitor.
Connect the pin 1 to pin 8 using the 47 piko farad capacitor.
Connect the +ve and the -ve terminals of the battery to the circuit as shown below.