#nt2017

NT2017 Rotary Cellphone MK I

It took over a year to get around to it, but I’ve finally overhauled my rotary cellphone to a state of functionality.  The Feather FONA board was partially damaged, and could no longer charge the battery.  There was a programming fault that prevented the called party from hearing anything being spoken, but that’s cleared up now.

I still haven’t figured out why caller ID information isn’t being returned correctly out of the function call provided by Adafruit, but whatever.  The faux dial tone no longer works, which is frustrating.  I still haven’t added things like a menu system to let the user set things like speaker volume, or read out texts, or whatever.  I added a vibration motor so you can unobtrusively be notified of incoming calls, which is the way I like it.

Sweet Jesus. What kind of glorious magician are you?

My business card says most of the relevant stuff:

Set up a makeshift workbench in my hotel room, hoping that I could fix the rotary cellphone before tomorrow. No dice after an hour of trying things ​with my handfull of parts.

Turns out that the SIM800’s 2.8V regulator isnt accessable on the Fona Feather boards. So there goes that. There is no 5V regulator on the SIM800 whatsoever. I can’t seem to get results when I convert the lithium battery up to 5V and feed it directly to the 5V input. Can’t feed the 3.3V rail with 3 volts, it doesn’t like that, not that the 32u4 should mind.

But hey, atleast I made it to NJ without destroying my engine this time around…

So some of y’all may not have heard, but I magically got this thing running at the 11th hour 2AM before the first day of VCF East XII.  I still think something important is broken here, but I can’t say what for sure.  I know the charging system on the Feather Fona is impeded by whatever broke.

Still, it ran all three days of VCF East for quite a few hours each day, and garnered a surprising amount of confusion, followed by praise.  Many people thought it was just a toy at first, then realized I was dead serious about it being a functional cellphone.

The rotary cellphone project has been revived with a fresh Feather Fona.  Charging is working again, which is nice.  Something isn’t quite right with my hook switch/dial tone logic.  I can place calls, and receive calls, but outbound audio isn’t passing...