comment [8]
- From trax on 07-12-2009 at 20:49:00
Hi Tony, all those capacitors you mentioned are in nF; 100nF and 10nF. The resistors are 374
kOhm and 4.7 kOhm.
IP: n/a
/Projects/Phone call alert
After putting together this little device, you must enter programming-mode to learn some phone numbers which this module will call after detecting an input on it's sensor pin.
After programming just supply power to the device. After pressing the button "Pokreni dojavu alarma" it will start to dial (tone or pulse, depending on the jumper setup). When the phone call is succesfully established, the called party should press pound key "#" to stop the device from calling another number or again.
UPDATE: Source code is now available for download!
You should put a sensor instead of button "Pokreni dojavu alarma".
Programming the numbers
- press the "program" button
- pick up the phone that is connected to the same phone-line as this device
- punch-in first number and then "*" key
- punch-in then next number and then "*" key
- punch-in the rest of numbers, if more, and finalise with "*#" (example: 061123123*061456456*#)
Please note: The device will learn 64 characters/digits including * and # keys.
Author (sent by): Trax
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Date: 17-02-2007
Lokalna verzija ove stranice: Phone call alert
Tags: controller, dtmf, line, phone. +add your tag
505_phone_dojava.zip
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comment [9]
- From edotz on 16-02-2010 at 23:12:57
Gdje se moze najjednostavnije kupiti MT8880, odnosno u kakvim uredjajima se konkretno nalazi da
ga pokusam skinuti?
IP: n/a
comment [7]
- From Tony Savarese on 07-12-2009 at 18:43:01
Thanks for posting your phone alarm project. It is exactly what I need. The schematic has
some charactors that I cant read. Please state the units for the capacitors that are connected
to MT8880 pins 2, 19, and 20 (100 ?F). Also for the capacitor at pin 8 (10 ?F). Please
confirm that the resistor at pin 18 is 374 kOhm. Please identify the value for the resistor
used with BC547 (4k7 ?). Thanks in advance. - Tony
IP: 65.70.183.71
comment [6]
- From tiencuong on 02-08-2009 at 17:36:19
Hi Trax ! I have just build this project. I have some problem : Some capacitor you use i can
not find them in my city then i use some capacitor 2A1003j,2A104J, MPH104j...But it no run.How
about capacitor you use : model,type...please tell me..I double check your schematic and PCB ,
I see them not same. Please give me Schematic same your boar. I'll try build it .You remind you
had said you will post one new version of GSM alarm in few day. PLease as soon as posible . I'm
waitting it.
Thank Trax very much
IP: n/a
comment [5]
- From baltazar on 12-05-2009 at 18:11:06
http://hackedgadgets.com/2007/03/27/alarm-phone-dialer/
IP: n/a
comment [4]
- From trax on 03-05-2009 at 23:16:35
Trafo je iz starog PC modema. Trebalo bi da bude 600ohm:600ohm ali moze i neki priblizan.
IP: n/a
comment [3]
- From slobodan on 02-05-2009 at 16:31:09
Koji trafo je upotrebljen, osim da je u odnosu 1/1 nema drugih podataka, i da li postoji spisak
delova za ovaj uredjaj, osim u el shemi.
IP: n/a
comment [2]
- From trax on 03-02-2009 at 17:42:24
You have everything you need in ZIP file above (just click on the red Download button). There
is no step-by-step process explained because it's pretty basic stuff: make PCB, drill holes,
solder parts and program the PIC micro controller with the HEX.
IP: n/a
comment [1]
- From tahsin_420 on 03-02-2009 at 08:22:26
anyone please give me the step by step process to build it . & please give me the code or
link to go to the code. thanks. please mail me if need.
tahsinakash06@gmail.com
IP: n/a
