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Wouldn't it be fun to use an old "Ma Bell" or candlestick phone in a car? My idea adapts a modern cell phone and cigarette lighter jack to power a rotary phone.
Use a bunch of logic gates or a BasicStamp to interpret the rotary pulse and control the ringer. Solder the digital controls to the
buttons of a used cell phone. To be safe (and to make a lot of fun noises), use a relay and resistor for each button on the phone. Power the POTS phone with a modified inverter.
The program or logic set-up would have to provide for sending and ending, of course. This idea probably wouldn't work well with the recent PC-like generation of cell phones.
I would love to be driving down the road and hear a real bell ring. My passenger would answer and say, "Sir, you're wanted on the ether."
250$ at Sparkfun [loonquawl, May 28 2009]
[loonquawl, May 28 2009]
||+, just because I like rotary phones.
||Mobile rotary pay phone. 35 cents please.
||cellphone in old phone is variously baked: [link];
||Basically, google for the terms : cell phone rotary