Alarm System Telephone Dailer

http://www.jakeselectronics.net/

Category:

Science & Technology

Tags:

• Home
• Alarm
• System
• Telephone
• Dialer
• PIC
• PIC16F84A
• Holtek
• 9200B
• DTMF
• Generator
• Programmer
• Sensor
• Jake
• Sutherland

[jakeontheweb]

I lost all the info for this circuit.

I can tell you though, i use a HOLTEK 9200B DTMF Generator to make the tones.

Find the data sheet, most of the info is in there.

And just google phone circuits on how to hook it up. you need a 600:600 ohm ac impedance transformer too.

[vargshagrath]

9

10

11

12...........................

Until the last number. Is this correct???

Thank you! For your help again it´s so helpfull.

If i have some mistakes with the English grammar, i´m so sorry i´m not very well in English xDD!!

Regards!!

[jakeontheweb]

@vargshagrath yes this looks right.

I can't remember exactly.

The timing diagram in the datasheet make it very clear.

[vargshagrath]

Hi!! I like your prooject!!. One cuestion.

how i can send the dtmf tone to the phone line?,

in others words, Which Interface did you used?. To conect the pin "TONE OUT" with the phone line?

[jakeontheweb]

@vargshagrath You need to couple it through an isolation tranformer.

Find a schematic that uses a 600ohm:600ohm impedance transformer.

[Darkdragonmillon]

where can i get this system in the market

[jakeontheweb]

@Darkdragonmillon I'm guessing you mean an alarm system With a telephone dialer.

Well, I haven't really researched this type of system so I dont know whats on the market. I just got straight into building my own because I knew what I wanted it to do.

I have been planning to expland it, but haven't got around to it YET.

I will one day.

[omairification]

hi jake it a good project i want build one for my self can u please provide me with the circuit diagram and parts list looking forward Omair

[vargshagrath]

Ohhh it works!!! Thanks a lot for your help n.n!!!

Oh i cant get a 600ohm:600ohm impedance transformer for interfacing the tone to the phone line, but i was found other way to interfacing it, whit a transistor and 2 capacitors. it´s very simple but works fine n.n!!!

[vargshagrath]

Oh!! OK!! Again thanks for your help!!! n.n

[vargshagrath]

Ohh!! Thanks a lot for your help!!! now i understand.,,, Amm in your program... How is your secuence for dialing a number?? For example...... If i want to dial 8112345 Is correct if i do this?: 1.- Set High the "Enable BIT". 2.- Send the data corresponding to the number 8 to the port 3.- Set low the "Enable Bit" 4.- Delay of 200 ms 5.-Set high the "Enable Bit" 6.- Send the data corresponding to the number 1 to the port 7.-Set Low "ENable Bit" 8.-Delay of 200 ms.