cordless phone hack

[Jeff Zimmerman]

I am working on a robotics project, and i need a way to control it
cheaply. I have a couple of cordless phones that aren't doing
anything, so it seems simple enough to use the DTMF to drive some
relays and operate the motors.

If anyone could help me out, I would greatly appreciate it.

 

[Peter]

Sounds VERY interesting

 

[Johnathon Chihonik]

On 5 Dec 2003 08:16:52 -0800, [email protected] (Jeff Zimmerman) wrote:

Hi, just starting to learn about telephony in data comm class but will
pass on anything i learn in the next 10 weeks that might be helpful
here for you

 

[Jacobe Hazzard]

I am working on a robotics project, and i need a way to
control it cheaply. I have a couple of cordless phones
that aren't doing anything, so it seems simple enough to
use the DTMF to drive some relays and operate the motors.

If anyone could help me out, I would greatly appreciate
it.

What do you need help with, specifically?

 

[Jeff Zimmerman]

I'm not sure how to even begin, I was thinking I could use a DTMF
decoder (similar to one that will display the number dialed) on the
line input on the base. but I think the voltages would be a problem,
my robot is limited to 24 VDC.

Another idea was to try to figure out where the tone is generated on
the base and go from there. I think this would be alot harder.

 

[Anand Dhuru]

I'm not sure how to even begin, I was thinking I could use a DTMF
decoder (similar to one that will display the number dialed) on the
line input on the base. but I think the voltages would be a problem,
my robot is limited to 24 VDC.

Another idea was to try to figure out where the tone is generated on
the base and go from there. I think this would be alot harder.

Hi,

Go to http://www.boondog.com and scroll down the tutorials list to the
DTMF decoder. I thinks that is pretty much what you are looking for.

Regards,

Anand Dhuru