Rotary dialer PIC interface

Step 7 Go beyond.

Figure out some sort of other use for the rotary dial other than blinking an LED.

Comments

[bipdan]

Great job. I was just wandering how i could transform an old phone to work with dtmf. I guees i have half of the answer. I was thinking of couting impulsions with a pic that would control a dtmf emitter when i found your intructuables. This is exectaly the starting point i needed as i was not sure how to connect the rotary switch to the ppic. This is just a porject in my head at the moment but i'll surely come bak if it goes furtuher

[randofo]

The pic can generate DTMF tones easily. AVRs can't. You can also get another chip to do it. Holtek manufactures some that are cheap and easy to use.