/Schematics/Everything else/GSM phone ring detection

This circuit was designed to detect when a call is incoming in a cellular phone (even when the calling tone of the device is switched-off) by means of a flashing LED.
The device must be placed a few centimeters from the cellular phone, so its sensor coil L1 can detect the field emitted by the phone receiver during an incoming call.

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Part list

R1____________100K 1/4W Resistor
R2______________3K9 1/4W Resistor
R3______________1M 1/4W Resistor
C1,C2_________100nF 63V Polyester Capacitors
C3____________220µF 25V Electrolytic Capacitor
D1______________LED Red 10mm. Ultra-bright (see Notes)
D2___________1N5819 40V 1A Schottky-barrier Diode (see Notes)
Q1____________BC547 45V 100mA NPN Transistor
IC1____________7555 or TS555CN CMos Timer IC
L1_____________Sensor coil (see Notes)
B1_____________1.5V Battery (AA or AAA)

Author (sent by): Red circuits

Download counter: 3,499

Rate: (2.88, votes 1517)

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Date: 26-03-2007

Lokalna verzija ove stranice: Detekcija emitovanja mobitela

202_detekcijaemitovanjamobitela.zip

Bookmark and Share Comments (16)

comment [16]

Ovaj sklop ce tesko raditi, jer za napajanje NE555 treba min 4.5V
IP: 37.19.108.12

comment [15]

Kako cu napraviti senzorsku zavojnicu?
IP: n/a

comment [14]

a sad vidim:) IP: 213.133.11.215
IP: 213.133.11.215

comment [13]

kolike su vrijednosti ovih djelova? IP: 213.133.11.215
IP: 213.133.11.215

comment [12]

Na izlazu je udvostrucivac napona (kondenzator i dioda), zato moze da radi na 1,5 V. IP: 213.198.202.228
IP: 213.198.202.228

comment [11]

sorry, sada vidim da moba biti par cm. Ako je to to, ovo se moze kupiti za 3 km gotovo. Manje je od klikera, privjesak za mobitel koji svjetluca kada mob zazvoni. Meni treba nesto sto bi radilo na 4-5 metara (unutar prostorije). Je'l moze?? IP: 80.71.146
IP: 80.71.146

comment [10]

Samo da kupim dijelove i bacam se na posao. Zanima me na koju ovo daljinu detektuje signal? IP: 80.71.146.42
IP: 80.71.146.42

comment [9]

javi ako radi :)
IP:

comment [8]

pa ovo sam cekao! Ljudi, ovo trazim duze vrijeme. Odlicno. nisam jos probao ali se bacam na posao. IP: 89.146.131.26
IP: 89.146.131.26

comment [7]

hm.. da.. zeznuo sam se.. ona sto trosi 20mA struje radi na 2 volta
IP:


Comment page: 12>


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