My Uno powered phone is finally finished/at a state where it does what its supposed to thanks in part to some help here. Unlike the other rotary mobile phones I am aware of this is in candlestick form.
The biggest problem was space. I would guess theres significantly less room to work around than your typical desk model. Most of the electronics I was able to fit into the phone casing itself but the battery and part of the ringer circuit required a box. It'd probably be possible to shrink the box or even eliminate but its too much of a hassle at this point. Next thing I would like to do is add an LCD display. However, I am already using most of the pins on the Uno so I'm not all that confident about being able to progress with this project. Especially since the Uno barely fits inside the phone as is.
I know they're called 'rotary' phones in the US, but elsewhere in the English speaking world they're known as 'dial' phones, as the phone itself isn't usually rotary, only the dial. The phones fitted in kiosks [booths] were fixed in place and couldn't be rotated.
The phone had to be 'off the hook' before you dialled a number, so that you could listen for the dialling tone. Wiring the hook as the power switch would extend your battery life. You might also like to use the tone library to produce a fake dialling tone. Google 'dialling tone frequency' to see what that is in the US. I know, in the UK, it's 425Hz. It varied slightly from one exchange to another in the days of Strowger (electro-mechanical) gear, but it's standardised at that frequency in modern electronic exchanges.
jarwulf:
I am already using most of the pins on the Uno so I'm not all that confident about being able to progress with this project.
Seriously!
You are using a UNO?
No wonder you are having problems fitting it.
Common sense dictates you use a Pro Micro, or at least a Nano if you must have USB connectivity (on a phone?). And you would be using a GSM module rather than a "shield".
Henry_Best:
Wiring the hook as the power switch would extend your battery life.
It would, but then how does one ring in to the phone?
I've gotten a strap and taken it around to several restaurants and shopping places. People aren't much for talking to strangers where I'm at unless they are selling something so mostly its just glances and some stares.
